From 8ef5ecd01ca5a5df87cb09d357a33ecb040451e0 Mon Sep 17 00:00:00 2001
From: ntk148v <ntk148v@users.noreply.github.com>
Date: Thu, 5 Dec 2024 03:37:23 +0000
Subject: [PATCH] deploy: 08633bcd04260ab538548efc698e8a992b12678f

---
 categories/index.html                         |    2 +-
 contact/index.html                            |    2 +-
 ...87c2c122c8be67cbd44532216013244c9ed994.css |    1 +
 ...6659db826835ff1dc67d1b304b0e6430cd35fd.css |    1 -
 index.html                                    |    4 +-
 index.xml                                     | 1847 ++++++++++++++++-
 posts/ansitheus/index.html                    |    2 +-
 posts/atop/index.html                         |    2 +-
 posts/bgp-ecmp-load-balancing/index.html      |    2 +-
 posts/clumsy-docker-network-notes/index.html  |    2 +-
 posts/docker-iptables/index.html              |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 posts/goat-playground/index.html              |    2 +-
 posts/goignore/index.html                     |    2 +-
 posts/golang-async/index.html                 |    2 +-
 posts/golang-block-forever/index.html         |    2 +-
 posts/index.html                              |    2 +-
 posts/index.xml                               | 1841 +++++++++++++++-
 posts/iptables/index.html                     |    2 +-
 posts/lets-comment/index.html                 |    2 +-
 .../index.html                                |    2 +-
 posts/linux-run-in-the-background/index.html  |    2 +-
 posts/linux-swap-space-note/index.html        |    2 +-
 posts/linux-sysrq/index.html                  |   64 +
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 .../index.html                                |    2 +-
 posts/operate-etcd-cluster/index.html         |    2 +-
 posts/problem-solving-techniques/index.html   |    2 +-
 posts/recurse-center/index.html               |    2 +-
 posts/rename-files-in-linux/index.html        |    2 +-
 posts/rip-kobe-bryant/index.html              |    2 +-
 .../set-animated-gif-as-wallpaper/index.html  |    2 +-
 .../testing-ansible-with-molecule/index.html  |    2 +-
 posts/thoughts/index.html                     |    2 +-
 .../index.html                                |    2 +-
 sitemap.xml                                   |    2 +-
 tags/algorithm/index.html                     |    2 +-
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 tags/ansible/index.html                       |    2 +-
 tags/ansible/index.xml                        |   51 +-
 tags/basketball/index.html                    |    2 +-
 tags/basketball/index.xml                     |    8 +-
 tags/bgp/index.html                           |    2 +-
 tags/bgp/index.xml                            |   29 +-
 tags/compton/index.html                       |    2 +-
 tags/compton/index.xml                        |    4 +-
 tags/csharp/index.html                        |    2 +-
 tags/csharp/index.xml                         |   13 +-
 tags/docker/index.html                        |    2 +-
 tags/docker/index.xml                         |   38 +-
 tags/ecmp/index.html                          |    2 +-
 tags/ecmp/index.xml                           |   29 +-
 tags/etcd/index.html                          |    2 +-
 tags/etcd/index.xml                           |  114 +-
 tags/faythe/index.html                        |    2 +-
 tags/faythe/index.xml                         |    9 +-
 tags/golang/index.html                        |    2 +-
 tags/golang/index.xml                         |   97 +-
 tags/hugo/index.html                          |    2 +-
 tags/hugo/index.xml                           |  790 ++++++-
 tags/i3/index.html                            |    2 +-
 tags/i3/index.xml                             |   11 +-
 tags/index.html                               |    2 +-
 tags/index.xml                                |    2 +-
 tags/iptables/index.html                      |    2 +-
 tags/iptables/index.xml                       |    9 +-
 tags/linux/index.html                         |    2 +-
 tags/linux/index.xml                          |  654 +++++-
 tags/network/index.html                       |    2 +-
 tags/network/index.xml                        |   29 +-
 tags/non-tech/index.html                      |    2 +-
 tags/non-tech/index.xml                       |   13 +-
 tags/note/index.html                          |    2 +-
 tags/note/index.xml                           |   57 +-
 tags/openstack/index.html                     |    2 +-
 tags/openstack/index.xml                      |    9 +-
 tags/playground/index.html                    |    2 +-
 tags/playground/index.xml                     |  790 ++++++-
 tags/polybar/index.html                       |    2 +-
 tags/polybar/index.xml                        |    9 +-
 tags/prometheus/index.html                    |    2 +-
 tags/prometheus/index.xml                     |   28 +-
 tags/ramblings/index.html                     |    2 +-
 tags/ramblings/index.xml                      |   19 +-
 tags/rofi/index.html                          |    2 +-
 tags/rofi/index.xml                           |  181 +-
 tags/shell/index.html                         |    2 +-
 tags/shell/index.xml                          |   13 +-
 tags/tech/index.html                          |    2 +-
 tags/tech/index.xml                           | 1750 +++++++++++++++-
 tags/techniques/index.html                    |    2 +-
 tags/techniques/index.xml                     |   21 +-
 tags/thoughts/index.html                      |    2 +-
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 tags/tiling-vm/index.html                     |    2 +-
 tags/tiling-vm/index.xml                      |   53 +-
 tags/tiling-wm/index.html                     |    2 +-
 tags/tiling-wm/index.xml                      |  201 +-
 tags/tips/index.html                          |    2 +-
 tags/tips/index.xml                           |  210 +-
 tags/tool/index.html                          |    2 +-
 tags/tool/index.xml                           |   10 +-
 tags/trick/index.html                         |    2 +-
 tags/trick/index.xml                          |   57 +-
 tags/xresources/index.html                    |    2 +-
 tags/xresources/index.xml                     |    4 +-
 112 files changed, 8840 insertions(+), 406 deletions(-)
 create mode 100644 css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css
 delete mode 100644 css/toigian.min.b0f760f912c9912a782fcf5aa56659db826835ff1dc67d1b304b0e6430cd35fd.css
 create mode 100644 posts/linux-sysrq/index.html

diff --git a/categories/index.html b/categories/index.html
index a09d030..2baa82b 100644
--- a/categories/index.html
+++ b/categories/index.html
@@ -1,5 +1,5 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/categories/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Categories</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" 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 2024
 <a href=https://github.com/ntk148v/hugo-toigian class="font-bold hover:underline">hugo-toigian</a></span><div id=header-theme-button><svg id="dark_mode_btn" class="hidden toolbox-btn" width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M21.752 15.002A9.718 9.718.0 0118 15.75c-5.385.0-9.75-4.365-9.75-9.75.0-1.33.266-2.597.748-3.752A9.753 9.753.0 003 11.25C3 16.635 7.365 21 12.75 21a9.753 9.753.0 009.002-5.998z"/></svg><svg id="light_mode_btn" class="hidden toolbox-btn" width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12 3v2.25m6.364.386-1.591 1.591M21 12h-2.25m-.386 6.364-1.591-1.591M12 18.75V21m-4.773-4.227-1.591 1.591M5.25 12H3m4.227-4.773L5.636 5.636M15.75 12a3.75 3.75.0 11-7.5.0 3.75 3.75.0 017.5.0z"/></svg></div></div></div></footer></body></html>
\ No newline at end of file
diff --git a/contact/index.html b/contact/index.html
index 0e668b1..c21b653 100644
--- a/contact/index.html
+++ b/contact/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Contact
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div id=toc></div><div class=content><p>You can reach me out on my online profiles 👇</p><ul><li><a href=https://github.com/ntk148v>Github</a></li><li><a href=https://t.me/@kiennt26>Telegram</a></li><li><a href=mailto:kiennt2609@gmail.com>Email</a></li></ul></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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\ No newline at end of file
diff --git a/index.html b/index.html
index a77053b..6616fdd 100644
--- a/index.html
+++ b/index.html
@@ -1,7 +1,7 @@
-<!doctype html><html lang=en><head><meta name=generator content="Hugo 0.133.1"><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
+<!doctype html><html lang=en><head><meta name=generator content="Hugo 0.139.3"><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Welcome
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">kiennt26's home</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">kiennt26's home</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>      ___
 </span></span><span class=line><span class=cl>     <span class=o>(</span>.. <span class=se>\ </span>     * whoami?     ntk148v/kiennt26/kiennt2609
 </span></span><span class=line><span class=cl>     <span class=o>(</span>&lt;&gt; <span class=p>|</span>      * country     Vietnam
 </span></span><span class=line><span class=cl>    //  <span class=se>\ \ </span>    * contact     check Contact page
diff --git a/index.xml b/index.xml
index 2c59b0f..6e47c42 100644
--- a/index.xml
+++ b/index.xml
@@ -1,69 +1,1778 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Welcome on kiennt26's home</title><link>https://ntk148v.github.io/</link><description>Recent content in Welcome on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 19 Jul 2024 08:53:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>Source:
-https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/ https://www.digitalocean.com/community/tutorials/atop-command-in-linux https://www.atoptool.nl/index.php top is great, we&amp;rsquo;re all familiar with it. htop is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data.</description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>A clumsy Docker networking notes Nguồn:
-https://github.com/ntk148v/til/tree/master/docker/networking https://argus-sec.com/docker-networking-behind-the-scenes/ https://docs.docker.com/network/ https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md https://docs.docker.com/engine/tutorials/networkingcontainers/ https://docs.docker.com/network/iptables/ https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj Khái niệm Các khái niệm:
-Network namespace:
-Trước khi đi vào network namespace, cần hiểu về Namespace. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác).</description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>The following content is rendered from my #til github. Recurse Center Source: https://www.recurse.com/
-The retreat where curious programmers recharge and grow I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from Julia Evan&amp;rsquo;s blog.
-Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other.</description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.
-Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:
-Commands must be on a single line. Arguments must be separated by whitespace. No quoting arguments or escaping whitespace. No piping or redirection. Before we start, make sure you have .</description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>This article is Golang version of Asynchronous programming with async and await guideline. They did really good job to demonstrate how asynchronous programming looks like.
-You can find source code here.
-Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.
-1. Pour a cup of coffee. 2. Heat a pan, then fry two eggs. 3. Fry three slices of bacon. 4. Toast two pieces of bread. 5. Add butter and jam to the toast.</description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>The following content is rendered from my #til github. Testing Ansible with Molecule Source:
-https://molecule.readthedocs.io/en/latest/getting-started/ https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule Table of contents:
-Testing Ansible with Molecule 0. Problem 1. Introduction 2. Play with Molecule 2.1. Getting started 2.2. Custom Docker image 2.3. Test an existing role 2.4. Test Cluster 0. Problem You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:</description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>Environment: Ubuntu 22.04, but it should work in other Linux distributions.
-Source: https://www.sobyte.net/post/2023-03/linux-services-in-the-background/
-You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?
-graph TD A(You don't want to wait for a running command) --> B{Do you want to see output?} A --> C{Do you want the command to stay running after the session ends?</description></item><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>A collection of interesting thoughts and opinions that I come across Willingness to look stupid Willingness to look stupidhttps://t.co/0WrVAzLQ6g pic.twitter.com/6NjysMwbch
-&amp;mdash; Dan Luu (@danluu) October 21, 2021 I recently read this article by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.
-People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:.</description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>The following content is from my #til github. Source
-https://github.com/leandromoreira/linux-network-performance-parameters/ https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/ https://blog.cloudflare.com/how-to-achieve-low-latency/ https://blog.cloudflare.com/how-to-receive-a-million-packets/ https://beej.us/guide/bgnet/html/ https://blog.csdn.net/armlinuxww/article/details/111930788 https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning Linux Networking stack Source:
-https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/
-https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/
-https://juejin.cn/post/7106345054368694280
-https://openwrt.org/docs/guide-developer/networking/praxis
-https://blog.51cto.com/u_15169172/2710604
-https://sn0rt.github.io/media/paper/TCPlinux.pdf
-https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8
-The complete network data flow:
-It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets. Linux queue: NOTE: The follow sections will heavily use sysctl. If you don&amp;rsquo;t familiar with this command, take a look at HOWTO#sysctl section.</description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>Iptables Source:
-https://www.thegeekstuff.com/2011/01/iptables-fundamentals/
-https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html
-https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
-https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/ - advanced
-Iptables
-1. Introduction 2. Netfilter hooks 3. iptables tables and chains 4. iptables rules 5. iptables drawbacks 6. iptables TRACE 1. Introduction iptables is used to manage packet filtering and NAT rules. iptables works with the kernel netfilter packet filtering framework. iptables is replaced with nftables, but iptables syntax is still commonly used as a baseline. iptables on a high-level. iptables tables chains rules 2.</description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>Hey, this is a simple post to play with GoAT Diagram.
-a W L A i a n p b d t o o w p s 1 B I n W t i e F r i n e t a L a S O p e S t b r o v X p e r 2 C A l o B u l d u e t B o o t h T a a i b O l S e t b 1 D · · · · · a U D A t b e a · · a # u d b n i · · · · a t c s # u a b · · · · · e t B e · · · d L S A e · N r · · v · · · e · · U r · · b · # u R · n a · · t c · # u k</description></item><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>via GIPHY
-Haven't thought of anything, have you? No, neither have I. Think, think, think
-The Feynman Algorithm The Feynman algorithm was facetiously suggested by Murray Gell-Mann, a colleague of Richard Feynman, in a New York Times interview.
-It is the combination of three steps:
-1. Write down the problem. 2. Think real hard. 3. Write down the solution. Polya&amp;rsquo;s Principles If you can&amp;#39;t solve a problem, then there is an easier problem you can solve: find it.</description></item><item><title>Contact</title><link>https://ntk148v.github.io/contact/</link><pubDate>Wed, 02 Nov 2022 10:15:45 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/contact/</guid><description>You can reach me out on my online profiles :point_down:
-Github Telegram Email</description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>Mission If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.
-Docker network Let&amp;rsquo;s start with a fact that Docker manipulates iptables rules to provide network isolation, on Linux. Docker installs custom iptables chains named DOCKER, DOCKER-USER and DOCKER-ISOLATION-STAGE-*, and it ensures that incoming packets are always checked by these chains first.
-iptables -L -n Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge.</description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>I&amp;rsquo;ve used Utterances for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - Giscus. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.
-So..
-Why migrate? Post reactions: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself.</description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>According to Reddis post and i3-gaps issue, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer doesn&amp;rsquo;t like it. But nevermind, we still have two ways to achieve it.
-Rounded i3-gaps Resloved have an awesome fork to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it here.
-Install i3-gaps. # Dependencies sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.</description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>Rename a single file with mv. Just a basic thing. Rename multiple files with mv. # Rename files with suffix .yaml to yml for f in *.yaml; do mv -- &amp;#34;$f&amp;#34; &amp;#34;${f%.yaml}.yml&amp;#34; done Rename multiple files with rename. # Install rename command # Ubuntu/Debian-derived distros sudo apt install rename # RedHat-derived distros sudo yum install prename # The follow examples are performed in Ubuntu/Debian-derived distros rename &amp;#39;s/.yaml/.yml/&amp;#39; *.yaml # Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34; rename &amp;#39;s/prev_/next_&amp;#39; *.</description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>Goignore - A .gitignore wizard which gnerates .gitignore files from the command line for you. Inspired by joe Features No installation necessary - just use the binary. Works on Linux, Windows &amp;amp; MacOS. Interactive user interface with bubbletea: Pagination, Filtering, Help&amp;hellip; Supports all Github-supported .gitignore files. Install Download the latest binary from the Release page. It&amp;rsquo;s the easiest way to get started with goignore. Make sure to add the location of the binary to your $PATH.</description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description> WIP</description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>bat - (cat alternative) bat: A cat(1) clone with syntax highlighting and Git integration. Example: fd - (find alternative) fd: a simple, fast and user-friendly alternative to find. Examples: httpie - (wget/curl alternative) httpie: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more. Examples: # Hello world $ http httpie.io/hello # Custom HTTP method, HTTP headers and JSON data $ http PUT pie.</description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>NOTE: Environment Ubuntu 20.04
-Dependencies Xwinwrap: sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev git clone https://github.com/ujjwal96/xwinwrap.git cd xwinwrap make sudo make install make clean Gifsicle: sudo apt install gifsicle The helper script A helper script to setup animated .gif in dual monitors.
-#!/bin/bash # Uses xwinwrap to display given animated .gif in dual monitors. if [ $# -ne 1 ]; then echo 1&amp;gt;&amp;amp;2 Usage: $0 image.gif exit 1 fi gif=$1 killall -9 xwinwrap killall -9 gifview # Get monitors resolution SCR1=`xrandr | awk &amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;` SCR2=`xrandr | awk &amp;#39;!</description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>What is Swap? Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.
-Swap partition size Old rule of thumb swap: 2 * the-amount-of-RAM So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time.</description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>Ansitheus: Ansible + Prometheus Prometheus overview NOTE: Checkout the Prometheus official documentation.
-Prometheus is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.
-Features a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs PromQL, a flexible query language to leverage this dimensionality no reliance on distributed storage; single server nodes are autonomous time series collection happens via a pull model over HTTP pushing time series is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing &amp;amp; dashboarding support Architecture &amp;amp; components Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs.</description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>NOTE: This is my perspective aggregation. You can easily find these such of knowledges in the references.
-Context Etcd Version v3.4.0.
-Requirements Number of nodes &amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with n-members, quorum is (n/2)+1. CPUs Etcd doesn&amp;rsquo;t require a lot of CPU capacity. Typical clusters need 2-4 cores to run smoothly.</description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:
-References Firstly give them some credits:
-https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/ https://pliutau.com/different-ways-to-block-go-runtime-forever/ NOTE: I run these with Golang 1.12
-The original package main import &amp;#34;fmt&amp;#34; func show() { for i := 1; i &amp;lt; 9696969; i++ { time.Sleep(1000) fmt.Println(i) } } func main() { go show() // The main goroutine is exited before the show() be done.</description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>Source: The Undefeated
-I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.
-Rest In Peace Mamba :basketball:</description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.
-That&amp;rsquo;s why I choose a Disqus alternative - Utterances. Utterances is a lightweight comments widget built on Github issues.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Welcome on kiennt26's home</title><link>https://ntk148v.github.io/</link><description>Recent content in Welcome on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux Magic System Request Key Hacks</title><link>https://ntk148v.github.io/posts/linux-sysrq/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-sysrq/</guid><description>&lt;p>Source: &lt;a href="https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html">https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html&lt;/a>&lt;/p>
+&lt;h2 id="giới-thiệu">Giới thiệu&lt;/h2>
+&lt;p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &amp;ldquo;treo&amp;rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng &lt;strong>Magic System Request Key (SysRq)&lt;/strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?&lt;/p>
+&lt;p>SysRq là một tính năng của Linux, cho phép người dùng gửi &amp;ldquo;tín hiệu cầu cứu&amp;rdquo; trực tiếp đến kernel của hệ điều hành.&lt;/p></description></item><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop">https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop&lt;/a>&lt;/li>
+&lt;li>&lt;a href="http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/">http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.digitalocean.com/community/tutorials/atop-command-in-linux">https://www.digitalocean.com/community/tutorials/atop-command-in-linux&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.atoptool.nl/index.php">https://www.atoptool.nl/index.php&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>top&lt;/code> is great, we&amp;rsquo;re all familiar with it. &lt;code>htop&lt;/code> is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But &lt;a href="https://www.atoptool.nl/index.php">&lt;code>atop&lt;/code>&lt;/a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &amp;ndash; in real time or &lt;em>historically&lt;/em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.&lt;/p></description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>&lt;h1 id="a-clumsy-docker-networking-notes">A clumsy Docker networking notes&lt;/h1>
+&lt;p>Nguồn:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ntk148v/til/tree/master/docker/networking">https://github.com/ntk148v/til/tree/master/docker/networking&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://argus-sec.com/docker-networking-behind-the-scenes/">https://argus-sec.com/docker-networking-behind-the-scenes/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/">https://docs.docker.com/network/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md">https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/engine/tutorials/networkingcontainers/">https://docs.docker.com/engine/tutorials/networkingcontainers/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/iptables/">https://docs.docker.com/network/iptables/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj">https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="khái-niệm">Khái niệm&lt;/h2>
+&lt;ul>
+&lt;li>
+&lt;p>Các khái niệm:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://man7.org/linux/man-pages/man8/ip-netns.8.html">Network namespace&lt;/a>:&lt;/p>
+&lt;ul>
+&lt;li>Trước khi đi vào network namespace, cần hiểu về &lt;strong>Namespace&lt;/strong>. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác). Tính năng này hoạt động bằng cách đưa tập các tài nguyên và process vào cùng một namespace, các namespace khác nhau sẽ tham chiếu đến các tài nguyên riêng biệt. Tài nguyên có thể tồn tại trong nhiều không gian. Ví dụ về các tài nguyên như vậy là process ID, hostname, user ID, tên file và một số tên (name) liên quan đến quyền truy cập mạng và giao tiếp giữa các process.&lt;/li>
+&lt;li>Networking namespace là một trong các loại namespace. Mỗi network namespace có &lt;a href="https://en.wikipedia.org/wiki/Network_stack">network stack&lt;/a> riêng: địa chỉ IP, network interface, route table, &amp;hellip;&lt;/li>
+&lt;li>Bạn có thể xem thao tác các network namespace bằng câu lệnh sau:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">$ sudo ip netns &amp;lt;sub-command&amp;gt;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://wiki.archlinux.org/index.php/Network_bridge">Network bridge&lt;/a>: một thiết bị mạng ảo chuyển tiếp các gói giữa hai hoặc nhiều phân đoạn mạng.&lt;/p></description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/recurse-center/README.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="recurse-center">Recurse Center&lt;/h1>
+&lt;p>Source: &lt;a href="https://www.recurse.com/">https://www.recurse.com/&lt;/a>&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-text" data-lang="text">&lt;span class="line">&lt;span class="cl">The retreat where curious programmers recharge and grow
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from &lt;a href="https://jvns.ca/blog/2017/09/17/how-i-spent-my-time-at-the-recurse-center/">Julia Evan&amp;rsquo;s blog&lt;/a>.&lt;/p>
+&lt;p>Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other. You will spnd six or 12 weeks programming at the edge of your abilities alongside motivated peers - at no cost to you.&lt;/p></description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>&lt;p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.&lt;/p>
+&lt;p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:&lt;/p>
+&lt;ul>
+&lt;li>Commands must be on a single line.&lt;/li>
+&lt;li>Arguments must be separated by whitespace.&lt;/li>
+&lt;li>No quoting arguments or escaping whitespace.&lt;/li>
+&lt;li>No piping or redirection.&lt;/li>
+&lt;/ul>
+&lt;blockquote>
+&lt;p>Before we start, make sure you have .NET Core environment and knownledge.&lt;/p></description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>This article is Golang version of &lt;a href="https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/">Asynchronous programming with async and await guideline&lt;/a>. They did really good job to demonstrate how asynchronous programming looks like.&lt;/p>
+&lt;p>You can find source code &lt;a href="https://github.com/ntk148v/testing/tree/master/golang/breakfast">here&lt;/a>.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Pour a cup of coffee.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Heat a pan, then fry two eggs.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Fry three slices of bacon.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">4. Toast two pieces of bread.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">5. Add butter and jam to the toast.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">6. Pour a glass of orange juice.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Each step takes time to finish, for example, you have to wait X seconds to make a glass of orange juice. Let&amp;rsquo;s write those instructions as Golang:&lt;/p></description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/ansible/molecule.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://molecule.readthedocs.io/en/latest/getting-started/">https://molecule.readthedocs.io/en/latest/getting-started/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule">https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>Table of contents:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#0-problem">0. Problem&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-play-with-molecule">2. Play with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#21-getting-started">2.1. Getting started&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#22-custom-docker-image">2.2. Custom Docker image&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#23-test-an-existing-role">2.3. Test an existing role&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#24-test-cluster">2.4. Test Cluster&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="0-problem">0. Problem&lt;/h2>
+&lt;p>You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:&lt;/p></description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>&lt;strong>Environment:&lt;/strong> Ubuntu 22.04, but it should work in other Linux distributions.&lt;/p>
+&lt;p>&lt;strong>Source&lt;/strong>: &lt;a href="https://www.sobyte.net/post/2023-03/linux-services-in-the-background/">https://www.sobyte.net/post/2023-03/linux-services-in-the-background/&lt;/a>&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?&lt;/p>
+
+&lt;div class="mermaid" align="center">
+graph TD
+A(You don't want to wait &lt;br>for a running command) --> B{Do you want to see output?}
+A --> C{Do you want the command to stay &lt;br>running after the session ends?}
+C --> |Yes| E(screen)
+B --> |No| D(Ctrl-Z or &amp;)
+B --> |Yes| F{Do you have requirements &lt;br>for log cutting, running users?}
+F --> |No| G(nohup)
+F --> |Yes| H(supervisor or systemd)
+&lt;/div>
+
+&lt;h2 id="ctrl-z-or-">Ctrl-Z or &amp;amp;&lt;/h2>
+&lt;p>For example, you have to excute &lt;code>ping&lt;/code> command:&lt;/p></description></item><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ A collection of interesting thoughts and opinions that I come across
+&lt;/blockquote>
+
+&lt;h2 id="willingness-to-look-stupid">Willingness to look stupid&lt;/h2>
+&lt;div align="center">
+ &lt;blockquote class="twitter-tweet">&lt;p lang="en" dir="ltr">Willingness to look stupid&lt;a href="https://t.co/0WrVAzLQ6g">https://t.co/0WrVAzLQ6g&lt;/a> &lt;a href="https://t.co/6NjysMwbch">pic.twitter.com/6NjysMwbch&lt;/a>&lt;/p>&amp;mdash; Dan Luu (@danluu) &lt;a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021&lt;/a>&lt;/blockquote> &lt;script async src="https://platform.twitter.com/widgets.js" charset="utf-8">&lt;/script>
+&lt;/div>
+&lt;p>I recently read &lt;a href="https://danluu.com/look-stupid/">this article&lt;/a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.&lt;/p>
+&lt;p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:. I&amp;rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &amp;hellip;). And I know that I&amp;rsquo;m not the only one, look smart but being stupid.&lt;/p></description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is from &lt;a href="https://github.com/ntk148v/til/blob/master/linux/network-performance-ultimate-guide.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;p>&lt;strong>Source&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/leandromoreira/linux-network-performance-parameters/">https://github.com/leandromoreira/linux-network-performance-parameters/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf">https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/">https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-achieve-low-latency/">https://blog.cloudflare.com/how-to-achieve-low-latency/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-receive-a-million-packets/">https://blog.cloudflare.com/how-to-receive-a-million-packets/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://beej.us/guide/bgnet/html/">https://beej.us/guide/bgnet/html/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.csdn.net/armlinuxww/article/details/111930788">https://blog.csdn.net/armlinuxww/article/details/111930788&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning">https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="linux-networking-stack">Linux Networking stack&lt;/h2>
+&lt;p>&lt;strong>Source:&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/">https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://juejin.cn/post/7106345054368694280">https://juejin.cn/post/7106345054368694280&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://openwrt.org/docs/guide-developer/networking/praxis">https://openwrt.org/docs/guide-developer/networking/praxis&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.51cto.com/u_15169172/2710604">https://blog.51cto.com/u_15169172/2710604&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://sn0rt.github.io/media/paper/TCPlinux.pdf">https://sn0rt.github.io/media/paper/TCPlinux.pdf&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8">https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>The complete network data flow:&lt;/p>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="http://web.archive.org/web/20170905131225if_/https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png" alt="">&lt;/p>
+&lt;ul>
+&lt;li>It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets.&lt;/li>
+&lt;li>Linux queue:&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://github.com/leandromoreira/linux-network-performance-parameters/raw/master/img/linux_network_flow.png" alt="">&lt;/p>
+&lt;p>&lt;strong>NOTE&lt;/strong>: The follow sections will heavily use &lt;code>sysctl&lt;/code>. If you don&amp;rsquo;t familiar with this command, take a look at &lt;a href="#204-sysctl">HOWTO#sysctl section&lt;/a>.&lt;/p></description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>&lt;h1 id="iptables">Iptables&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://www.thegeekstuff.com/2011/01/iptables-fundamentals/">https://www.thegeekstuff.com/2011/01/iptables-fundamentals/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html">https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture">https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/">https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/&lt;/a> - advanced&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="#iptables">Iptables&lt;/a>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-netfilter-hooks">2. Netfilter hooks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#3-iptables-tables-and-chains">3. iptables tables and chains&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#4-iptables-rules">4. iptables rules&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#5-iptables-drawbacks">5. iptables drawbacks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#6-iptables-trace">6. iptables TRACE&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="1-introduction">1. Introduction&lt;/h2>
+&lt;ul>
+&lt;li>iptables is used to manage packet filtering and NAT rules.&lt;/li>
+&lt;li>iptables works with the kernel &lt;code>netfilter&lt;/code> packet filtering framework.
+&lt;ul>
+&lt;li>iptables is replaced with &lt;code>nftables&lt;/code>, but &lt;code>iptables&lt;/code> syntax is still commonly used as a baseline.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>iptables on a high-level.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> chains
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rules
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-netfilter-hooks">2. Netfilter hooks&lt;/h2>
+&lt;ul>
+&lt;li>There are 4 netfilter hooks that programs can register with. As packets progress through the stack, they will trigger the kernel modules that have registered with these hooks.
+&lt;ul>
+&lt;li>&lt;code>NF_IP_PRE_ROUTING&lt;/code>: triggered by any incoming traffic very soon after entering network stack. This hook is processed before any routing decisions have been made regarding where to send the packet.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_IN&lt;/code>: triggered after an incoming packet has been routed if the packet is destined for the local system.&lt;/li>
+&lt;li>&lt;code>NF_IP_FORWARD&lt;/code>: triggered after an incoming packet has been routed if the packet is to be forwarded to another host.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_OUT&lt;/code>: triggered by any locally created outbound traffic as soon as it hits the network stack.&lt;/li>
+&lt;li>&lt;code>NF_IP_POST_ROUTING&lt;/code>: triggerd by any outgoing or forwarded traffic after routing has taken place and just before being sent out on the wire.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://people.netfilter.org/pablo/nf-hooks.png" alt="">&lt;/p></description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>&lt;p>Hey, this is a simple post to play with &lt;a href="https://github.com/blampe/goat">GoAT Diagram&lt;/a>.&lt;/p>
+
+
+
+&lt;div class="goat svg-container ">
+ 
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+&lt;/g>
+
+ &lt;/svg>
+ 
+&lt;/div></description></item><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>&lt;div align="center">
+ &lt;iframe src="https://giphy.com/embed/777Aby0ZetYE8" width="480" height="259" frameBorder="0" class="giphy-embed" allowFullScreen>&lt;/iframe>&lt;p>&lt;a href="https://giphy.com/gifs/cute-think-pooh-777Aby0ZetYE8">via GIPHY&lt;/a>&lt;/p>
+ &lt;p>Haven't thought of anything, have you? No, neither have I. Think, think, think&lt;/p>
+&lt;/div>
+&lt;h2 id="the-feynman-algorithm">The Feynman Algorithm&lt;/h2>
+&lt;p>The &lt;a href="http://wiki.c2.com/?FeynmanAlgorithm">Feynman algorithm&lt;/a> was facetiously suggested by &lt;a href="http://en.wikipedia.org/wiki/Murray_Gell-Mann">Murray Gell-Mann&lt;/a>, a colleague of &lt;a href="https://en.wikipedia.org/wiki/Richard_Feynman">Richard Feynman&lt;/a>, in a New York Times interview.&lt;/p>
+&lt;p>It is the combination of three steps:&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Write down the problem.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Think real hard.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Write down the solution.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="polyas-principles">Polya&amp;rsquo;s Principles&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">If you can&amp;#39;t solve a problem, then there is an easier problem you can
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">solve: find it.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">-- George Poyla --
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>George Polya described in his 1957 book &lt;a href="https://en.wikipedia.org/wiki/How_to_Solve_It">How to Solve It&lt;/a> (HowToSolveIt) a set of heuristics for solving problems. A basic outline of his approach is pretty similar to Feynman&amp;rsquo;s Algorithm:&lt;/p></description></item><item><title>Contact</title><link>https://ntk148v.github.io/contact/</link><pubDate>Wed, 02 Nov 2022 10:15:45 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/contact/</guid><description>&lt;p>You can reach me out on my online profiles :point_down:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ntk148v">Github&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://t.me/@kiennt26">Telegram&lt;/a>&lt;/li>
+&lt;li>&lt;a href="mailto:kiennt2609@gmail.com">Email&lt;/a>&lt;/li>
+&lt;/ul></description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>&lt;h2 id="mission">Mission&lt;/h2>
+&lt;p>If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.&lt;/p>
+&lt;h2 id="docker-network">Docker network&lt;/h2>
+&lt;p>Let&amp;rsquo;s start with a fact that Docker manipulates &lt;code>iptables&lt;/code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named &lt;code>DOCKER&lt;/code>, &lt;code>DOCKER-USER&lt;/code> and &lt;code>DOCKER-ISOLATION-STAGE-*&lt;/code>, and it ensures that incoming packets are always checked by these chains first.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables -L -n
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge. You may want to check &lt;a href="https://github.com/ntk148v/til/blob/master/docker/networking/README.md">Docker network note&lt;/a>. I will only show iptables packet flow: For example, we have a host with ip 10.0.10.26, then start a container that is exposed port 8000 to internet.&lt;/p></description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>&lt;p>I&amp;rsquo;ve used &lt;a href="./lets-comment.md">Utterances&lt;/a> for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - &lt;a href="https://github.com/giscus/giscus">Giscus&lt;/a>. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.&lt;/p>
+&lt;p>So..&lt;/p>
+&lt;h2 id="why-migrate">Why migrate?&lt;/h2>
+&lt;ul>
+&lt;li>&lt;strong>Post reactions&lt;/strong>: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself. giscus provides this feature.&lt;/li>
+&lt;li>&lt;strong>Conversation view&lt;/strong>: utterances will simply render comments as a list in the order they have been created. Giscus groups replies to a comment instead. I mean comment is about discussion, right?&lt;/li>
+&lt;/ul>
+&lt;h2 id="prepare-your-site">Prepare your site&lt;/h2>
+&lt;ul>
+&lt;li>Migrate from utterances: &lt;a href="https://docs.github.com/en/discussions/managing-discussions-for-your-community/moderating-discussions#converting-an-issue-to-a-discussion">convert the existing issues into discussions&lt;/a>.&lt;/li>
+&lt;li>Follow &lt;a href="https://giscus.app/">Giscus&lt;/a>, it&amp;rsquo;s quite simple.&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>Leave a comment :point_down:&lt;/code>&lt;/p></description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>&lt;p>According to &lt;a href="https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/">Reddis post&lt;/a> and &lt;a href="https://github.com/Airblader/i3/issues/167">i3-gaps issue&lt;/a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-328562433">doesn&amp;rsquo;t like it&lt;/a>. But nevermind, we still have two ways to achieve it.&lt;/p>
+&lt;h2 id="rounded-i3-gaps">Rounded i3-gaps&lt;/h2>
+&lt;p>&lt;a href="https://github.com/resloved">Resloved&lt;/a> have an awesome &lt;a href="https://github.com/resloved/i3">fork&lt;/a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it &lt;a href="https://github.com/ntk148v/i3">here&lt;/a>.&lt;/p>
+&lt;ul>
+&lt;li>Install i3-gaps.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Dependencies&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-util0-dev libxcb-icccm4-dev libyajl-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libstartup-notification0-dev libxcb-randr0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libev-dev libxcb-cursor-dev libxcb-xinerama0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> autoconf libxcb-xrm0 libxcb-xrm-dev automake i3status &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> ninja-build meson libxcb-shape0-dev build-essential -y
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ntk148v/i3.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> i3/
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Compile&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mkdir -p build &lt;span class="o">&amp;amp;&amp;amp;&lt;/span> &lt;span class="nb">cd&lt;/span> build
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">meson ..
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">ninja
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo ninja install
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Configure rounded corners by adding this to your config.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">border_radius 10
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result, but you can see that these corners look so jagged (check out this &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-485263770">comment&lt;/a>).&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-1.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-4.png">
+&lt;/figure>
+
+&lt;h2 id="picom">picom&lt;/h2>
+&lt;ul>
+&lt;li>You can also achieve rounded corners by using &lt;a href="https://github.com/yshui/picom">picom&lt;/a>.&lt;/li>
+&lt;li>Install picom.&lt;/li>
+&lt;li>Configure rounded corners by changing &lt;code>corner_radius&lt;/code> value.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl"># Path ~/.config/picom.conf
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">corner_radius: 10;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result looks much smoother.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-2.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-3.png">
+&lt;/figure></description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>&lt;ul>
+&lt;li>Rename a single file with &lt;code>mv&lt;/code>. Just a basic thing.&lt;/li>
+&lt;li>Rename multiple files with &lt;code>mv&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Rename files with suffix .yaml to yml&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">for&lt;/span> f in *.yaml&lt;span class="p">;&lt;/span> &lt;span class="k">do&lt;/span> mv -- &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="nv">$f&lt;/span>&lt;span class="s2">&amp;#34;&lt;/span> &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="si">${&lt;/span>&lt;span class="nv">f&lt;/span>&lt;span class="p">%.yaml&lt;/span>&lt;span class="si">}&lt;/span>&lt;span class="s2">.yml&amp;#34;&lt;/span> &lt;span class="k">done&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Rename multiple files with &lt;code>rename&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Install rename command&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install rename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># RedHat-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo yum install prename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># The follow examples are performed in Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/.yaml/.yml/&amp;#39;&lt;/span> *.yaml
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/prev_/next_&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Delete part of a filename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/next_//&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Limit changes to specific parts of filenames&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Only change the files that start with &amp;#34;paramater&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/^param/parameter/&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Search with grouping&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;string&amp;#34; and &amp;#34;strong&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/(str|stro)ng/strength&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Use translations with rename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Force filenames to uppercase&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;y/a-z/A-Z&amp;#39;&lt;/span> *.py
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># More?&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">man rename
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;a href="https://github.com/ntk148v/goignore">Goignore&lt;/a> - A &lt;code>.gitignore&lt;/code> wizard which gnerates &lt;code>.gitignore&lt;/code> files from the command line for you. Inspired by &lt;a href="https://github.com/karan/joe">joe&lt;/a>
+&lt;/blockquote>
+
+&lt;h2 id="features">Features&lt;/h2>
+&lt;ul>
+&lt;li>No installation necessary - just use the binary.&lt;/li>
+&lt;li>Works on Linux, Windows &amp;amp; MacOS.&lt;/li>
+&lt;li>Interactive user interface with &lt;a href="https://github.com/charmbracelet/bubbletea">bubbletea&lt;/a>: Pagination, Filtering, Help&amp;hellip;&lt;/li>
+&lt;li>Supports all Github-supported &lt;a href="https://github.com/github/gitignore.git">.gitignore files&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="install">Install&lt;/h2>
+&lt;ul>
+&lt;li>Download the latest binary from the &lt;a href="https://github.com/ntk148v/goignore/releases">Release page&lt;/a>. It&amp;rsquo;s the easiest way to get started with &lt;code>goignore&lt;/code>.&lt;/li>
+&lt;li>Make sure to add the location of the binary to your &lt;code>$PATH&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="usage">Usage&lt;/h2>
+&lt;ul>
+&lt;li>Just run.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">chmod a+x goignore
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">goignore
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>
+&lt;p>At the first time, &lt;code>goignore&lt;/code> will download the Gitignore templates from Github. It may take a few seconds (depend on your network).&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>&lt;h2 id="bat---cat-alternative">bat - (cat alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/bat">bat&lt;/a>: A cat(1) clone with syntax highlighting and Git integration.&lt;/li>
+&lt;li>Example:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/bat.png">
+&lt;/figure>
+
+&lt;h2 id="fd---find-alternative">fd - (find alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/fd">fd&lt;/a>: a simple, fast and user-friendly alternative to &lt;code>find&lt;/code>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg">
+&lt;/figure>
+
+&lt;h2 id="httpie---wgetcurl-alternative">httpie - (wget/curl alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://httpie.io">httpie&lt;/a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Hello world&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http httpie.io/hello
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Custom HTTP method, HTTP headers and JSON data&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http PUT pie.dev/put X-API-Token:123 &lt;span class="nv">name&lt;/span>&lt;span class="o">=&lt;/span>John
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Submitting forms&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http -f POST pie.dev/post &lt;span class="nv">hello&lt;/span>&lt;span class="o">=&lt;/span>World
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Upload a file using redirect input&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http pie.dev/post &amp;lt; files/data.json
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://httpie.io&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="ripgrep---grep-alternative">ripgrep - (grep alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep">ripgrep&lt;/a>: a faster &lt;code>grep&lt;/code>. ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.&lt;/li>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep#quick-examples-comparing-tools">Benchmark&lt;/a>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Basic use&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg fast README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Regular expressions&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fast\w+&amp;#39;&lt;/span> README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Recursive search - recursively searching the directory (current directory is default)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fn write\(&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="delta">delta&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/dandavison/delta">delta&lt;/a>: Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.&lt;/li>
+&lt;li>Diff/git diff doesn&amp;rsquo;t show you exactly what was changed.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/git-diff.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Delta shows within-line highlights based on a Levenshtein edit inference algorithm.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/delta.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>By default, delta restructures the git output slightly to make the hunk markers human-readable:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://user-images.githubusercontent.com/52205/81059276-254cf980-8e9e-11ea-95c3-8b757a4c11b5.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Example config:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>core&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> pager: delta
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>delta&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> plus-style: &lt;span class="s2">&amp;#34;syntax #98c379&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> minus-style: &lt;span class="s2">&amp;#34;syntax #e06c75&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> syntax-theme: OneHalfDark
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> navigate: &lt;span class="nb">true&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> features: line-numbers decorations
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>interactive&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> diffFilter: delta --color-only
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Completely replace &lt;code>diff&lt;/code> with &lt;code>delta&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">diff&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;delta&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="z">z&lt;/h2>
+&lt;ul>
+&lt;li>Tired for &lt;code>cd&lt;/code>ing into the same directories over and over? Save your time with &lt;code>z&lt;/code> command!&lt;/li>
+&lt;li>&lt;a href="https://github.com/rupa/z">z&lt;/a>: jump around. Z is a shell script that makes jumping around your file directory pleasantly simple. Instead of trying to remember the exact path of where you need to go, or worse, &lt;code>cd&lt;/code>ing into the next directory followed by &lt;code>ls&lt;/code>ing and then cding again over and over (we’ve all been there), Z allows you to “lazy type” where you want to go and it’ll handle the rest.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Takes me to my workspace folder from anywhere.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ z workspace
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="fzf">fzf&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/junegunn/fzf">fzf&lt;/a>: fzf is a general-purpose command-line fuzzy finder.&lt;/li>
+&lt;li>It&amp;rsquo;s an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Read the list from STDIN and write the selected item to STDOUT&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ find * -type f &lt;span class="p">|&lt;/span> fzf &amp;gt; selected
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim &lt;span class="k">$(&lt;/span>fzf&lt;span class="k">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># COMMAND **&amp;lt;TAB&amp;gt;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under the current directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># - You can select multiple items with TAB key&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under your home directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ~/**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under current directory (single-selection)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under ~/github that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> ~/github/fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Can select multiple processes with &amp;lt;TAB&amp;gt; or &amp;lt;Shift-TAB&amp;gt; keys&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">kill&lt;/span> -9 &amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unset&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">export&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unalias&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/junegunn/fzf&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-vim.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-cd.png">
+&lt;/figure>
+
+&lt;h2 id="thefuck">thefuck&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/nvbn/thefuck">thefuck&lt;/a>: Magnificent app which corrects your previous console command.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ apt-get install vim
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Could not open lock file /var/lib/dpkg/lock - open &lt;span class="o">(&lt;/span>13: Permission denied&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Unable to lock the administration directory &lt;span class="o">(&lt;/span>/var/lib/dpkg/&lt;span class="o">)&lt;/span>, are you root?
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ fuck
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt-get install vim &lt;span class="o">[&lt;/span>enter/↑/↓/ctrl+c&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">Reading package lists... Done
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">...
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://github.com/nvbn/thefuck&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="exa---ls-alternative">exa - (ls alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://the.exa.website">exa&lt;/a>: A modern replacement for ls. &lt;code>exa&lt;/code> is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Completely replace &lt;code>ls&lt;/code> with &lt;code>exa&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">ls&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;exa&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa-ls.png">
+&lt;/figure></description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Environment Ubuntu 20.04&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="dependencies">Dependencies&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ujjwal96/xwinwrap">Xwinwrap&lt;/a>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ujjwal96/xwinwrap.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo make install
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make clean
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Gifsicle:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install gifsicle
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="the-helper-script">The helper script&lt;/h2>
+&lt;p>A helper script to setup animated .gif in dual monitors.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="cp">#!/bin/bash
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="cp">&lt;/span>&lt;span class="c1"># Uses xwinwrap to display given animated .gif in dual monitors.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">if&lt;/span> &lt;span class="o">[&lt;/span> &lt;span class="nv">$#&lt;/span> -ne &lt;span class="m">1&lt;/span> &lt;span class="o">]&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="k">then&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">echo&lt;/span> 1&amp;gt;&lt;span class="p">&amp;amp;&lt;/span>&lt;span class="m">2&lt;/span> Usage: &lt;span class="nv">$0&lt;/span> image.gif
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">exit&lt;/span> &lt;span class="m">1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">fi&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">gif&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nv">$1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 gifview
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Get monitors resolution&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR1&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR2&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;!/primary/ &amp;amp;&amp;amp; /connected/ { print $3 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR1&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR2&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>If you want to run xwinwrap by yourself, here is the example:&lt;/p></description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>&lt;h2 id="what-is-swap">What is Swap?&lt;/h2>
+&lt;p>Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.&lt;/p>
+&lt;h2 id="swap-partition-size">Swap partition size&lt;/h2>
+&lt;h3 id="old-rule-of-thumb">Old rule of thumb&lt;/h3>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">swap: 2 * the-amount-of-RAM
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time. Nowadays, RAM has become a &lt;code>cheap&lt;/code> &amp;amp; &lt;code>affordable&lt;/code> commondity, so the 2x rule is outdated.&lt;/p></description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">Ansitheus: Ansible + Prometheus
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="prometheus-overview">Prometheus overview&lt;/h2>
+&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Checkout the &lt;a href="https://prometheus.io/docs/introduction/overview/">Prometheus official documentation&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;p>&lt;a href="https://github.com/prometheus">Prometheus&lt;/a> is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.&lt;/p>
+&lt;h3 id="features">Features&lt;/h3>
+&lt;ul>
+&lt;li>a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs&lt;/li>
+&lt;li>PromQL, a flexible query language to leverage this dimensionality&lt;/li>
+&lt;li>no reliance on distributed storage; single server nodes are autonomous&lt;/li>
+&lt;li>time series collection happens via a pull model over HTTP&lt;/li>
+&lt;li>pushing time series is supported via an intermediary gateway&lt;/li>
+&lt;li>targets are discovered via service discovery or static configuration&lt;/li>
+&lt;li>multiple modes of graphing &amp;amp; dashboarding support&lt;/li>
+&lt;/ul>
+&lt;h3 id="architecture--components">Architecture &amp;amp; components&lt;/h3>
+&lt;p>Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. It stores all scraped samples locally &amp;amp; runs rules over this data to either aggregate &amp;amp; record new time series from existing data or generate alerts. Grafana or other API consumers can be used to visualize the collected data.&lt;/p></description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: This is my perspective aggregation. You can easily find these such of knowledges in &lt;a href="#5-references">the references&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="context">Context&lt;/h2>
+&lt;p>Etcd Version &lt;code>v3.4.0&lt;/code>.&lt;/p>
+&lt;h2 id="requirements">Requirements&lt;/h2>
+&lt;h3 id="number-of-nodes">Number of nodes&lt;/h3>
+&lt;ul>
+&lt;li>&amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with &lt;strong>n-members&lt;/strong>, quorum is &lt;strong>(n/2)+1&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;h3 id="cpus">CPUs&lt;/h3>
+&lt;ul>
+&lt;li>Etcd doesn&amp;rsquo;t require a lot of CPU capacity.&lt;/li>
+&lt;li>Typical clusters need &lt;strong>2-4 cores&lt;/strong> to run smoothly.&lt;/li>
+&lt;/ul>
+&lt;h3 id="memory">Memory&lt;/h3>
+&lt;ul>
+&lt;li>Etcd performance depends on having enough memory (cache key-value data, tracking watchers&amp;hellip;).&lt;/li>
+&lt;li>Typical &lt;strong>8GB&lt;/strong> is enough.&lt;/li>
+&lt;/ul>
+&lt;h3 id="disk">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd cluster is very sensitive to disk latencies. Since etcd must persist proposals to its log, disk activity from other processes may cause long &lt;code>fsync&lt;/code> latencies. The upshot is etcd may miss heartbeats, causing request timeouts and temporary leader loss. An etcd server can sometimes stably run alongside these processes when given a high disk priority.&lt;/li>
+&lt;li>Check whether a disk is fast enough for etcd using &lt;a href="https://github.com/axboe/fio">fio&lt;/a>. If the 99th percentile of fdatasync is &lt;strong>&amp;lt;10ms&lt;/strong>, your storage is ok.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ fio --rw&lt;span class="o">=&lt;/span>write --ioengine&lt;span class="o">=&lt;/span>sync --fdatasync&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --directory&lt;span class="o">=&lt;/span>test-data &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> --size&lt;span class="o">=&lt;/span>22m --bs&lt;span class="o">=&lt;/span>&lt;span class="m">2300&lt;/span> --name&lt;span class="o">=&lt;/span>mytest
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>&lt;strong>SSD&lt;/strong> is recommended.&lt;/li>
+&lt;/ul>
+&lt;h3 id="network">Network&lt;/h3>
+&lt;ul>
+&lt;li>Etcd cluster should be deployed in a fast and reliable network. Low latency ensures etcd members can communicate fast. High bandwidth can reduce the time to recover a failed etcd member.&lt;/li>
+&lt;li>&lt;strong>1GbE&lt;/strong> is sufficient for common etcd.&lt;/li>
+&lt;li>Note that the network isn&amp;rsquo;t the only source of latency. Each request and response may be impacted by slow disks on both the leader and followers.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tuning">Tuning&lt;/h2>
+&lt;h3 id="time-parameters">Time parameters&lt;/h3>
+&lt;ul>
+&lt;li>&lt;code>Heartbeat interval&lt;/code>.
+&lt;ul>
+&lt;li>The frequency with which the leader will notify followers that it is still the leader.&lt;/li>
+&lt;li>Default: &lt;strong>100ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>Around 0.5-1.5 x round-trip time (RTT) between members&lt;/strong>. Measure RTT with &lt;code>ping&lt;/code>.&lt;/li>
+&lt;li>Tradeoff: Too low -&amp;gt; etcd will send unnecessary messages -&amp;gt; increase the usage of CPU and network resources. Too high -&amp;gt; leads to high election timeout.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>&lt;code>Election timeout&lt;/code>.
+&lt;ul>
+&lt;li>How long a follower node will go without hearing a heartbeat before attempting to become leader itself.&lt;/li>
+&lt;li>Default: &lt;strong>1000ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>&amp;gt;= 10 x RTT and &amp;lt; 50s&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>The heartbeat interval and election timeout value should be &lt;strong>the same for all members in one cluster&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --heartbeat-interval&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> --election-timeout&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_HEARTBEAT_INTERVAL&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> &lt;span class="nv">ETCD_ELECTION_TIMEOUT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="disk-1">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd server can sometimes stably run alongside these processes when given a high disk priority using &lt;a href="https://linux.die.net/man/1/ionice">ionice&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># best effort, highest priority&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ sudo ionice -c2 -n0 -p &lt;span class="sb">`&lt;/span>pgrep etcd&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="snapshot">Snapshot&lt;/h3>
+&lt;ul>
+&lt;li>etcd appends all key changes to a log file -&amp;gt; huge log that grows forever :point_up:&lt;/li>
+&lt;li>Solution: Make periodic snapshots (save the current and remove old logs).&lt;/li>
+&lt;li>Default: make snapshots after every &lt;strong>10 000 changes&lt;/strong>.&lt;/li>
+&lt;li>Tuning: Just in case that etcd&amp;rsquo;s memory and disk usage is too high, lower threshold.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --snapshot-count&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_SNAPSHOT_COUNT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="maintenance">Maintenance&lt;/h2>
+&lt;h3 id="history-compaction">History compaction&lt;/h3>
+&lt;ul>
+&lt;li>Etcd keeps an exact history of its keyspace, the history should be periodically compacted to avoid performance degradation and eventual storage space exhaustion.&lt;/li>
+&lt;li>Etcd can be set to automatically compact the keyspace with the &lt;code>--auto-compaction-*&lt;/code> option with a period of hours.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># keep one hour of history&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --auto-compaction-retention&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --auto-compaction-mode&lt;span class="o">=&lt;/span>periodic
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Compaction modes:
+&lt;ul>
+&lt;li>Revision-based: &lt;code>--auto-compaction-mode=revision --auto-compaction-retention=1000&lt;/code> automatically Compact on &amp;ldquo;latest revision&amp;rdquo; - 1000 every 5-minute (when latest revision is 30000, compact on revision 29000). Use this when having a large keyspace.&lt;/li>
+&lt;li>Periodic: &lt;code>--auto-compaction-mode=periodic --auto-compaction-retention=72h&lt;/code> automatically Compact with 72-hour retention window every 1-hour. Use this when having a huge number of revisions for a key-value pair.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h3 id="defragmentation">Defragmentation&lt;/h3>
+&lt;ul>
+&lt;li>Compacting old revisions internally fragments etcd by leaving gaps in backend database - &lt;code>internal fragmentation&lt;/code>.&lt;/li>
+&lt;li>Internal fragmentation space is available for use by etcd but unavailable to the host filesystem.&lt;/li>
+&lt;li>Solution: Release this space back to the filesystem with defrag.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ etcdctl defrag
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>It should be run rather infrequently, as there is always going to be an unavoidable pause.&lt;/li>
+&lt;/ul>
+&lt;h2 id="references">References&lt;/h2>
+&lt;ul>
+&lt;li>Etcd hardware: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md">https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md&lt;/a>&lt;/li>
+&lt;li>Etcd tuning: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md">https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md&lt;/a>&lt;/li>
+&lt;li>Etcd maintainence: &lt;a href="https://etcd.io/docs/v3.4.0/op-guide/maintenance/">https://etcd.io/docs/v3.4.0/op-guide/maintenance/&lt;/a>&lt;/li>
+&lt;/ul></description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>&lt;p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:&lt;/p>
+&lt;h2 id="references">References&lt;/h2>
+&lt;p>Firstly give them some credits:&lt;/p>
+&lt;ol>
+&lt;li>&lt;a href="https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/">https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://pliutau.com/different-ways-to-block-go-runtime-forever/">https://pliutau.com/different-ways-to-block-go-runtime-forever/&lt;/a>&lt;/li>
+&lt;/ol>
+&lt;blockquote>
+&lt;p>NOTE: I run these with Golang 1.12&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="the-original">The original&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">1000&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="c1">// The main goroutine is exited before the show() be done.
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="bad---an-empty-infinite-loop">Bad - An empty infinite loop&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="p">(&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;time&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="c1">// Empty, just do nothing
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">5&lt;/span> &lt;span class="o">*&lt;/span> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nx">Second&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>An infinite loop here is a busy loop that does nothing except burn CPU time.&lt;/p></description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>&lt;p>&lt;img src="./theundefeated-kobe-bryant.pg" alt="">&lt;/p>
+&lt;p>Source: &lt;a href="https://theundefeated.com/features/kobe-vs-kobe-bryant-lakers-numbers-8-and-24-jersey-retirement/">The Undefeated&lt;/a>&lt;/p>
+&lt;p>I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.&lt;/p>
+&lt;p>Rest In Peace Mamba :basketball:&lt;/p>
+&lt;p>&lt;img src="./kobe.jpg" alt="">&lt;/p></description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>&lt;p>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.&lt;/p>
+&lt;p>That&amp;rsquo;s why I choose a Disqus alternative - &lt;a href="https://utteranc.es/">Utterances&lt;/a>. Utterances is a lightweight comments widget built on Github issues. Use Github issues for blog comments, wiki pages and more!&lt;/p></description></item></channel></rss>
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ansitheus/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Ansitheus</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ansitheus/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Ansitheus</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Ansitheus</h1><time class="text-sm italic tabular-nums text-muted">2020/05/05&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/ansible/ id=tag>Ansible</a>
 <a href=/tags/prometheus/ id=tag>Prometheus</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#prometheus-overview>Prometheus overview</a><ol><li><a href=#features>Features</a></li><li><a href=#architecture--components>Architecture & components</a></li></ol></li><li><a href=#ansitheus>Ansitheus</a><ol><li><a href=#why-ansitheus>Why Ansitheus?</a></li><li><a href=#features-1>Features</a></li><li><a href=#components>Components</a></li><li><a href=#getting-started>Getting started</a></li><li><a href=#contributors>Contributors</a></li></ol></li></ol></nav></div></details></div><div class=content><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>Ansitheus: Ansible + Prometheus
diff --git a/posts/atop/index.html b/posts/atop/index.html
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@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Atop
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/atop/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Atop</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/atop/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Atop</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Atop</h1><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tool/ id=tag>Tool</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#installation>Installation</a></li><li><a href=#first-look>First look</a><ol><li><a href=#system-level-top-section>System level (top section)</a></li><li><a href=#process-level-bottom-section>Process level (bottom section)</a></li></ol></li><li><a href=#background-running>Background running</a></li><li><a href=#useful-commands-and-shortcut>Useful commands and shortcut</a></li><li><a href=#for-advanced-users>For advanced users</a><ol><li><a href=#thread-information>Thread information</a></li><li><a href=#disk-activity-information>Disk activity information</a></li><li><a href=#memory-leaks>Memory leaks</a></li></ol></li></ol></nav></div></details></div><div class=content><p>Source:</p><ul><li><a href=https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop>https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop</a></li><li><a href=http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/>http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/</a></li><li><a href=https://www.digitalocean.com/community/tutorials/atop-command-in-linux>https://www.digitalocean.com/community/tutorials/atop-command-in-linux</a></li><li><a href=https://www.atoptool.nl/index.php>https://www.atoptool.nl/index.php</a></li></ul><p><code>top</code> is great, we&rsquo;re all familiar with it. <code>htop</code> is even better, (and with eye-catching look). But sometimes these tools aren&rsquo;t enough, they only give the 10,000 foot overview of resource. They don&rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But <a href=https://www.atoptool.nl/index.php><code>atop</code></a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &ndash; in real time or <em>historically</em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.</p><h2 id=installation>Installation</h2><p>Installation is as simple as opening your package manager and selecting it for installation.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl><span class=c1># RedHat CentOS</span>
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/network/ id=tag>Network</a>
 <a href=/tags/bgp/ id=tag>Bgp</a>
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/12/12&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/docker/ id=tag>Docker</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#khái-niệm>Khái niệm</a></li><li><a href=#docker-và-network-namespace>Docker và network namespace</a></li><li><a href=#tản-mạn-qua-docker-networking-subsystem>Tản mạn qua Docker networking subsystem</a><ol><li><a href=#docker0---default-bridge-network>docker0 - default bridge network</a></li><li><a href=#user-defined-bridge-network>User-defined bridge network</a></li></ol></li><li><a href=#một-số-command-hay-ho>Một số command hay ho</a></li></ol></nav></div></details></div><div class=content><h1 id=a-clumsy-docker-networking-notes>A clumsy Docker networking notes</h1><p>Nguồn:</p><ul><li><a href=https://github.com/ntk148v/til/tree/master/docker/networking>https://github.com/ntk148v/til/tree/master/docker/networking</a></li><li><a href=https://argus-sec.com/docker-networking-behind-the-scenes/>https://argus-sec.com/docker-networking-behind-the-scenes/</a></li><li><a href=https://docs.docker.com/network/>https://docs.docker.com/network/</a></li><li><a href=https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md>https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md</a></li><li><a href=https://docs.docker.com/engine/tutorials/networkingcontainers/>https://docs.docker.com/engine/tutorials/networkingcontainers/</a></li><li><a href=https://docs.docker.com/network/iptables/>https://docs.docker.com/network/iptables/</a></li><li><a href=https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj>https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj</a></li></ul><h2 id=khái-niệm>Khái niệm</h2><ul><li><p>Các khái niệm:</p><ul><li><p><a href=https://man7.org/linux/man-pages/man8/ip-netns.8.html>Network namespace</a>:</p><ul><li>Trước khi đi vào network namespace, cần hiểu về <strong>Namespace</strong>. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác). Tính năng này hoạt động bằng cách đưa tập các tài nguyên và process vào cùng một namespace, các namespace khác nhau sẽ tham chiếu đến các tài nguyên riêng biệt. Tài nguyên có thể tồn tại trong nhiều không gian. Ví dụ về các tài nguyên như vậy là process ID, hostname, user ID, tên file và một số tên (name) liên quan đến quyền truy cập mạng và giao tiếp giữa các process.</li><li>Networking namespace là một trong các loại namespace. Mỗi network namespace có <a href=https://en.wikipedia.org/wiki/Network_stack>network stack</a> riêng: địa chỉ IP, network interface, route table, &mldr;</li><li>Bạn có thể xem thao tác các network namespace bằng câu lệnh sau:</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>$ sudo ip netns &lt;sub-command&gt;
 </span></span></code></pre></div></li><li><p><a href=https://wiki.archlinux.org/index.php/Network_bridge>Network bridge</a>: một thiết bị mạng ảo chuyển tiếp các gói giữa hai hoặc nhiều phân đoạn mạng.</p></li><li><p><strong>Veth pair</strong>: hiểu đơn giản là virtual network cable nối giữa 2 network interface device (NIC).</p></li></ul></li><li><p>Về cơ bản, Docker sử dụng các tính năng trên như sau:</p></li></ul><p><img src=https://res.cloudinary.com/practicaldev/image/fetch/s--tGvJLH6y--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://dev-to-uploads.s3.amazonaws.com/i/pszchqfvcjpl13dextrc.png alt></p><h2 id=docker-và-network-namespace>Docker và network namespace</h2><blockquote><p>Ví dụ sau lấy theo các thông số, cấu hình mặc định khi chạy Docker container.</p></blockquote><ul><li>Khi tạo và chạy 1 container, Docker đồng thời tạo ra một network namespace riêng cho container đó. Sau đó, Docker kết nối network của container đó với Linux bridge <strong>docker0</strong> bằng veth pair.</li><li>Như ở trên đã nói, để xem danh sách network namespace, gõ câu lệnh sau:</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>$ sudo ip netns list
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/docker/ id=tag>Docker</a>
 <a href=/tags/iptables/ id=tag>Iptables</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#mission>Mission</a></li><li><a href=#docker-network>Docker network</a></li><li><a href=#you-may-do-it-wrong---common-mistakes>You may do it wrong - common mistakes</a><ol><li><a href=#modify-docker-generated-rules-manually>Modify Docker generated rules manually</a></li><li><a href=#insert-you-rules-in-the-wrong-chain>Insert you rules in the wrong chain</a></li><li><a href=#modify-and-persistent-iptables-wrong>Modify and persistent iptables wrong</a></li></ol></li><li><a href=#do-it-right>Do it right!</a><ol><li><a href=#overview>Overview</a></li><li><a href=#getting-started>Getting started</a></li></ol></li><li><a href=#references>References</a></li></ol></nav></div></details></div><div class=content><h2 id=mission>Mission</h2><p>If you&rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.</p><h2 id=docker-network>Docker network</h2><p>Let&rsquo;s start with a fact that Docker manipulates <code>iptables</code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named <code>DOCKER</code>, <code>DOCKER-USER</code> and <code>DOCKER-ISOLATION-STAGE-*</code>, and it ensures that incoming packets are always checked by these chains first.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>iptables -L -n
diff --git a/posts/getting-started-tiling-wm-part-1-i3/index.html b/posts/getting-started-tiling-wm-part-1-i3/index.html
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 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Getting Started with Tiling WM [Part 1] - I3
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I3</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-1-i3/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 1] - I3</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 1] - I3</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tiling-wm/ id=tag>Tiling-Wm</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a>
diff --git a/posts/getting-started-tiling-wm-part-2-rofi/index.html b/posts/getting-started-tiling-wm-part-2-rofi/index.html
index 044d90a..01c37b5 100644
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+++ b/posts/getting-started-tiling-wm-part-2-rofi/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Getting Started with Tiling WM [Part 2] - Rofi
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Rofi</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-2-rofi/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 2] - Rofi</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 2] - Rofi</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-2-rofi/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 2] - Rofi</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-2-rofi/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 2] - Rofi</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 2] - Rofi</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tiling-wm/ id=tag>Tiling-Wm</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a>
diff --git a/posts/getting-started-tiling-wm-part-3-polybar/index.html b/posts/getting-started-tiling-wm-part-3-polybar/index.html
index 0ebb881..8a85f73 100644
--- a/posts/getting-started-tiling-wm-part-3-polybar/index.html
+++ b/posts/getting-started-tiling-wm-part-3-polybar/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Getting Started with Tiling WM [Part 3] - Polybar
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Polybar</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-3-polybar/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 3] - Polybar</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 3] - Polybar</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-3-polybar/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 3] - Polybar</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-3-polybar/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 3] - Polybar</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 3] - Polybar</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tiling-wm/ id=tag>Tiling-Wm</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a>
diff --git a/posts/getting-started-tiling-wm-part-4-xresources/index.html b/posts/getting-started-tiling-wm-part-4-xresources/index.html
index 72a6cc4..df69936 100644
--- a/posts/getting-started-tiling-wm-part-4-xresources/index.html
+++ b/posts/getting-started-tiling-wm-part-4-xresources/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Getting Started with Tiling WM [Part 4] - Xresources
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Xresources</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started with Tiling WM [Part 4] - Xresources</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started with Tiling WM [Part 4] - Xresources</h1><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/tiling-wm/ id=tag>Tiling-Wm</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a>
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@@ -1,7 +1,7 @@
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/tiling-wm/ id=tag>Tiling-Wm</a>
 <a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a>
diff --git a/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/index.html b/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/index.html
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@@ -1,7 +1,7 @@
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started Tiling Wm [Part 6] I3 Rounded Corners</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Getting Started Tiling Wm [Part 6] I3 Rounded Corners</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</h1><time class="text-sm italic tabular-nums text-muted">2022/01/10&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/tiling-vm/ id=tag>Tiling-Vm</a>
 <a href=/tags/linux/ id=tag>Linux</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#rounded-i3-gaps>Rounded i3-gaps</a></li><li><a href=#picom>picom</a></li></ol></nav></div></details></div><div class=content><p>According to <a href=https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/>Reddis post</a> and <a href=https://github.com/Airblader/i3/issues/167>i3-gaps issue</a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer <a href=https://github.com/Airblader/i3/issues/167#issuecomment-328562433>doesn&rsquo;t like it</a>. But nevermind, we still have two ways to achieve it.</p><h2 id=rounded-i3-gaps>Rounded i3-gaps</h2><p><a href=https://github.com/resloved>Resloved</a> have an awesome <a href=https://github.com/resloved/i3>fork</a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it <a href=https://github.com/ntk148v/i3>here</a>.</p><ul><li>Install i3-gaps.</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl><span class=c1># Dependencies</span>
diff --git a/posts/goat-playground/index.html b/posts/goat-playground/index.html
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--- a/posts/goat-playground/index.html
+++ b/posts/goat-playground/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Goat Playground
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/goat-playground/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Goat Playground</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/goat-playground/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Goat Playground</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Goat Playground</h1><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/hugo/ id=tag>Hugo</a>
 <a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/playground/ id=tag>Playground</a></div><div id=toc></div><div class=content><p>Hey, this is a simple post to play with <a href=https://github.com/blampe/goat>GoAT Diagram</a>.</p><div class="goat svg-container"><svg font-family="Menlo,Lucida Console,monospace" viewBox="0 0 760 841"><g transform="translate(8,16)"><path d="M64 32h64" fill="none" stroke="currentcolor"/><path d="M176 32h16" fill="none" stroke="currentcolor"/><path d="M192 32h32" fill="none" stroke="currentcolor"/><path d="M224 32h16" fill="none" stroke="currentcolor"/><path d="M288 32h16" fill="none" stroke="currentcolor"/><path d="M304 32h32" fill="none" stroke="currentcolor"/><path d="M336 32h16" fill="none" stroke="currentcolor"/><path d="M4e2 32h8" fill="none" stroke="currentcolor"/><path d="M456 32h8" fill="none" stroke="currentcolor"/><path d="M512 32h16" fill="none" stroke="currentcolor"/><path d="M560 32h16" fill="none" stroke="currentcolor"/><path d="M624 32h40" fill="none" 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diff --git a/posts/goignore/index.html b/posts/goignore/index.html
index 00dd734..89af43e 100644
--- a/posts/goignore/index.html
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@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Goignore
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/goignore/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Goignore</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/goignore/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Goignore</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Goignore</h1><time class="text-sm italic tabular-nums text-muted">2021/11/26&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/golang/ id=tag>Golang</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#features>Features</a></li><li><a href=#install>Install</a></li><li><a href=#usage>Usage</a></li></ol></nav></div></details></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-foam"><a href=https://github.com/ntk148v/goignore>Goignore</a> - A <code>.gitignore</code> wizard which gnerates <code>.gitignore</code> files from the command line for you. Inspired by <a href=https://github.com/karan/joe>joe</a></blockquote><h2 id=features>Features</h2><ul><li>No installation necessary - just use the binary.</li><li>Works on Linux, Windows & MacOS.</li><li>Interactive user interface with <a href=https://github.com/charmbracelet/bubbletea>bubbletea</a>: Pagination, Filtering, Help&mldr;</li><li>Supports all Github-supported <a href=https://github.com/github/gitignore.git>.gitignore files</a>.</li></ul><h2 id=install>Install</h2><ul><li>Download the latest binary from the <a href=https://github.com/ntk148v/goignore/releases>Release page</a>. It&rsquo;s the easiest way to get started with <code>goignore</code>.</li><li>Make sure to add the location of the binary to your <code>$PATH</code>.</li></ul><h2 id=usage>Usage</h2><ul><li>Just run.</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>chmod a+x goignore
 </span></span><span class=line><span class=cl>goignore
diff --git a/posts/golang-async/index.html b/posts/golang-async/index.html
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@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
 | Golang Async
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/golang/ id=tag>Golang</a></div><div id=toc></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-iris"><p>This article is Golang version of <a href=https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/>Asynchronous programming with async and await guideline</a>. They did really good job to demonstrate how asynchronous programming looks like.</p><p>You can find source code <a href=https://github.com/ntk148v/testing/tree/master/golang/breakfast>here</a>.</p></blockquote><p>Throughout this article, we&rsquo;ll write the instructions to make a breakfast.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>1. Pour a cup of coffee.
 </span></span><span class=line><span class=cl>2. Heat a pan, then fry two eggs.
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/golang/ id=tag>Golang</a>
 <a href=/tags/trick/ id=tag>Trick</a>
 <a href=/tags/note/ id=tag>Note</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#references>References</a></li><li><a href=#the-original>The original</a></li><li><a href=#bad---an-empty-infinite-loop>Bad - An empty infinite loop</a></li><li><a href=#good---busy-blocking>Good - Busy blocking</a></li><li><a href=#good---waiting-on-itself>Good - Waiting on itself</a></li><li><a href=#good---empty-select>Good - Empty select</a></li><li><a href=#good---double-locking>Good - Double locking</a></li><li><a href=#good---reading-an-empty-channel>Good - Reading an Empty Channel</a></li><li><a href=#good---self-produce-and-consume>Good - Self produce-and-consume</a></li></ol></nav></div></details></div><div class=content><p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&rsquo;ve collected:</p><h2 id=references>References</h2><p>Firstly give them some credits:</p><ol><li><a href=https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/>https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/</a></li><li><a href=https://pliutau.com/different-ways-to-block-go-runtime-forever/>https://pliutau.com/different-ways-to-block-go-runtime-forever/</a></li></ol><blockquote><p>NOTE: I run these with Golang 1.12</p></blockquote><h2 id=the-original>The original</h2><div class=highlight><pre tabindex=0 class=chroma><code class=language-go data-lang=go><span class=line><span class=cl><span class=kn>package</span> <span class=nx>main</span>
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class=col-span-2>Thoughts</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/writing-a-simple-shell-in-c-sharp/ class=col-span-2>Writing a Simple Shell in C Sharp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/recurse-center/ class=col-span-2>Recurse-Center</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/23&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-async/ class=col-span-2>Golang Async</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/iptables/ class=col-span-2>Iptables</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/02/24&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-run-in-the-background/ class=col-span-2>Linux Run in the Background</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/testing-ansible-with-molecule/ class=col-span-2>Testing Ansible With Molecule</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/problem-solving-techniques/ class=col-span-2>Problem Solving Techniques</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goat-playground/ class=col-span-2>Goat Playground</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2022</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/ class=col-span-2>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/01/10&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/bgp-ecmp-load-balancing/ class=col-span-2>Bgp Ecmp Load Balancing</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/docker-iptables/ class=col-span-2>Docker and Iptables: You may do it wrong!</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/10/25&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/moving-from-utterances-to-giscus/ class=col-span-2>Moving from Utterances to Giscus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/08/30&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2021</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-tools-that-you-never-knew-you-needed/ class=col-span-2>Linux tools that you never knew you needed</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-1-i3/ class=col-span-2>Getting Started with Tiling WM [Part 1] - I3</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-2-rofi/ class=col-span-2>Getting Started with Tiling WM [Part 2] - Rofi</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-3-polybar/ class=col-span-2>Getting Started with Tiling WM [Part 3] - Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goignore/ class=col-span-2>Goignore</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/11/26&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/set-animated-gif-as-wallpaper/ class=col-span-2>Set Animated Gif as Wallpaper</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/01/14&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class=col-span-2>Getting Started with Tiling WM [Part 4] - Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-5-compton/ class=col-span-2>Getting Started with Tiling WM [Part 5] - Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/rename-files-in-linux/ class=col-span-2>Rename Files in Linux</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/12/16&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-block-forever/ class=col-span-2>Golang: Block forever</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/operate-etcd-cluster/ class=col-span-2>Operate Etcd cluster</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/28&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/ansitheus/ class=col-span-2>Ansitheus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-swap-space-note/ class=col-span-2>Swap space note</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/rip-kobe-bryant/ class=col-span-2>Rest In Peace Kobe Bryant</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/01/27&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2019</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/openstack-autoscaling-new-approach/ class=col-span-2>Openstack Autoscaling New Approach</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2018</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/lets-comment/ class=col-span-2>Lets Comment</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2018/10/02&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center 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@@ -1,68 +1,1773 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Posts on kiennt26's home</title><link>https://ntk148v.github.io/posts/</link><description>Recent content in Posts on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 19 Jul 2024 08:53:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/posts/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>Source:
-https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/ https://www.digitalocean.com/community/tutorials/atop-command-in-linux https://www.atoptool.nl/index.php top is great, we&amp;rsquo;re all familiar with it. htop is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data.</description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>A clumsy Docker networking notes Nguồn:
-https://github.com/ntk148v/til/tree/master/docker/networking https://argus-sec.com/docker-networking-behind-the-scenes/ https://docs.docker.com/network/ https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md https://docs.docker.com/engine/tutorials/networkingcontainers/ https://docs.docker.com/network/iptables/ https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj Khái niệm Các khái niệm:
-Network namespace:
-Trước khi đi vào network namespace, cần hiểu về Namespace. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác).</description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>The following content is rendered from my #til github. Recurse Center Source: https://www.recurse.com/
-The retreat where curious programmers recharge and grow I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from Julia Evan&amp;rsquo;s blog.
-Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other.</description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.
-Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:
-Commands must be on a single line. Arguments must be separated by whitespace. No quoting arguments or escaping whitespace. No piping or redirection. Before we start, make sure you have .</description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>This article is Golang version of Asynchronous programming with async and await guideline. They did really good job to demonstrate how asynchronous programming looks like.
-You can find source code here.
-Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.
-1. Pour a cup of coffee. 2. Heat a pan, then fry two eggs. 3. Fry three slices of bacon. 4. Toast two pieces of bread. 5. Add butter and jam to the toast.</description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>The following content is rendered from my #til github. Testing Ansible with Molecule Source:
-https://molecule.readthedocs.io/en/latest/getting-started/ https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule Table of contents:
-Testing Ansible with Molecule 0. Problem 1. Introduction 2. Play with Molecule 2.1. Getting started 2.2. Custom Docker image 2.3. Test an existing role 2.4. Test Cluster 0. Problem You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:</description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>Environment: Ubuntu 22.04, but it should work in other Linux distributions.
-Source: https://www.sobyte.net/post/2023-03/linux-services-in-the-background/
-You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?
-graph TD A(You don't want to wait for a running command) --> B{Do you want to see output?} A --> C{Do you want the command to stay running after the session ends?</description></item><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>A collection of interesting thoughts and opinions that I come across Willingness to look stupid Willingness to look stupidhttps://t.co/0WrVAzLQ6g pic.twitter.com/6NjysMwbch
-&amp;mdash; Dan Luu (@danluu) October 21, 2021 I recently read this article by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.
-People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:.</description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>The following content is from my #til github. Source
-https://github.com/leandromoreira/linux-network-performance-parameters/ https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/ https://blog.cloudflare.com/how-to-achieve-low-latency/ https://blog.cloudflare.com/how-to-receive-a-million-packets/ https://beej.us/guide/bgnet/html/ https://blog.csdn.net/armlinuxww/article/details/111930788 https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning Linux Networking stack Source:
-https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/
-https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/
-https://juejin.cn/post/7106345054368694280
-https://openwrt.org/docs/guide-developer/networking/praxis
-https://blog.51cto.com/u_15169172/2710604
-https://sn0rt.github.io/media/paper/TCPlinux.pdf
-https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8
-The complete network data flow:
-It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets. Linux queue: NOTE: The follow sections will heavily use sysctl. If you don&amp;rsquo;t familiar with this command, take a look at HOWTO#sysctl section.</description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>Iptables Source:
-https://www.thegeekstuff.com/2011/01/iptables-fundamentals/
-https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html
-https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
-https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/ - advanced
-Iptables
-1. Introduction 2. Netfilter hooks 3. iptables tables and chains 4. iptables rules 5. iptables drawbacks 6. iptables TRACE 1. Introduction iptables is used to manage packet filtering and NAT rules. iptables works with the kernel netfilter packet filtering framework. iptables is replaced with nftables, but iptables syntax is still commonly used as a baseline. iptables on a high-level. iptables tables chains rules 2.</description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>Hey, this is a simple post to play with GoAT Diagram.
-a W L A i a n p b d t o o w p s 1 B I n W t i e F r i n e t a L a S O p e S t b r o v X p e r 2 C A l o B u l d u e t B o o t h T a a i b O l S e t b 1 D · · · · · a U D A t b e a · · a # u d b n i · · · · a t c s # u a b · · · · · e t B e · · · d L S A e · N r · · v · · · e · · U r · · b · # u R · n a · · t c · # u k</description></item><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>via GIPHY
-Haven't thought of anything, have you? No, neither have I. Think, think, think
-The Feynman Algorithm The Feynman algorithm was facetiously suggested by Murray Gell-Mann, a colleague of Richard Feynman, in a New York Times interview.
-It is the combination of three steps:
-1. Write down the problem. 2. Think real hard. 3. Write down the solution. Polya&amp;rsquo;s Principles If you can&amp;#39;t solve a problem, then there is an easier problem you can solve: find it.</description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>Mission If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.
-Docker network Let&amp;rsquo;s start with a fact that Docker manipulates iptables rules to provide network isolation, on Linux. Docker installs custom iptables chains named DOCKER, DOCKER-USER and DOCKER-ISOLATION-STAGE-*, and it ensures that incoming packets are always checked by these chains first.
-iptables -L -n Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge.</description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>I&amp;rsquo;ve used Utterances for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - Giscus. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.
-So..
-Why migrate? Post reactions: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself.</description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>According to Reddis post and i3-gaps issue, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer doesn&amp;rsquo;t like it. But nevermind, we still have two ways to achieve it.
-Rounded i3-gaps Resloved have an awesome fork to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it here.
-Install i3-gaps. # Dependencies sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.</description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>Rename a single file with mv. Just a basic thing. Rename multiple files with mv. # Rename files with suffix .yaml to yml for f in *.yaml; do mv -- &amp;#34;$f&amp;#34; &amp;#34;${f%.yaml}.yml&amp;#34; done Rename multiple files with rename. # Install rename command # Ubuntu/Debian-derived distros sudo apt install rename # RedHat-derived distros sudo yum install prename # The follow examples are performed in Ubuntu/Debian-derived distros rename &amp;#39;s/.yaml/.yml/&amp;#39; *.yaml # Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34; rename &amp;#39;s/prev_/next_&amp;#39; *.</description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>Goignore - A .gitignore wizard which gnerates .gitignore files from the command line for you. Inspired by joe Features No installation necessary - just use the binary. Works on Linux, Windows &amp;amp; MacOS. Interactive user interface with bubbletea: Pagination, Filtering, Help&amp;hellip; Supports all Github-supported .gitignore files. Install Download the latest binary from the Release page. It&amp;rsquo;s the easiest way to get started with goignore. Make sure to add the location of the binary to your $PATH.</description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description> WIP</description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>bat - (cat alternative) bat: A cat(1) clone with syntax highlighting and Git integration. Example: fd - (find alternative) fd: a simple, fast and user-friendly alternative to find. Examples: httpie - (wget/curl alternative) httpie: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more. Examples: # Hello world $ http httpie.io/hello # Custom HTTP method, HTTP headers and JSON data $ http PUT pie.</description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>NOTE: Environment Ubuntu 20.04
-Dependencies Xwinwrap: sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev git clone https://github.com/ujjwal96/xwinwrap.git cd xwinwrap make sudo make install make clean Gifsicle: sudo apt install gifsicle The helper script A helper script to setup animated .gif in dual monitors.
-#!/bin/bash # Uses xwinwrap to display given animated .gif in dual monitors. if [ $# -ne 1 ]; then echo 1&amp;gt;&amp;amp;2 Usage: $0 image.gif exit 1 fi gif=$1 killall -9 xwinwrap killall -9 gifview # Get monitors resolution SCR1=`xrandr | awk &amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;` SCR2=`xrandr | awk &amp;#39;!</description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>What is Swap? Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.
-Swap partition size Old rule of thumb swap: 2 * the-amount-of-RAM So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time.</description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>Ansitheus: Ansible + Prometheus Prometheus overview NOTE: Checkout the Prometheus official documentation.
-Prometheus is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.
-Features a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs PromQL, a flexible query language to leverage this dimensionality no reliance on distributed storage; single server nodes are autonomous time series collection happens via a pull model over HTTP pushing time series is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing &amp;amp; dashboarding support Architecture &amp;amp; components Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs.</description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>NOTE: This is my perspective aggregation. You can easily find these such of knowledges in the references.
-Context Etcd Version v3.4.0.
-Requirements Number of nodes &amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with n-members, quorum is (n/2)+1. CPUs Etcd doesn&amp;rsquo;t require a lot of CPU capacity. Typical clusters need 2-4 cores to run smoothly.</description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:
-References Firstly give them some credits:
-https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/ https://pliutau.com/different-ways-to-block-go-runtime-forever/ NOTE: I run these with Golang 1.12
-The original package main import &amp;#34;fmt&amp;#34; func show() { for i := 1; i &amp;lt; 9696969; i++ { time.Sleep(1000) fmt.Println(i) } } func main() { go show() // The main goroutine is exited before the show() be done.</description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>Source: The Undefeated
-I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.
-Rest In Peace Mamba :basketball:</description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.
-That&amp;rsquo;s why I choose a Disqus alternative - Utterances. Utterances is a lightweight comments widget built on Github issues.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Posts on kiennt26's home</title><link>https://ntk148v.github.io/posts/</link><description>Recent content in Posts on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/posts/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux Magic System Request Key Hacks</title><link>https://ntk148v.github.io/posts/linux-sysrq/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-sysrq/</guid><description>&lt;p>Source: &lt;a href="https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html">https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html&lt;/a>&lt;/p>
+&lt;h2 id="giới-thiệu">Giới thiệu&lt;/h2>
+&lt;p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &amp;ldquo;treo&amp;rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng &lt;strong>Magic System Request Key (SysRq)&lt;/strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?&lt;/p>
+&lt;p>SysRq là một tính năng của Linux, cho phép người dùng gửi &amp;ldquo;tín hiệu cầu cứu&amp;rdquo; trực tiếp đến kernel của hệ điều hành.&lt;/p></description></item><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop">https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop&lt;/a>&lt;/li>
+&lt;li>&lt;a href="http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/">http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.digitalocean.com/community/tutorials/atop-command-in-linux">https://www.digitalocean.com/community/tutorials/atop-command-in-linux&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.atoptool.nl/index.php">https://www.atoptool.nl/index.php&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>top&lt;/code> is great, we&amp;rsquo;re all familiar with it. &lt;code>htop&lt;/code> is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But &lt;a href="https://www.atoptool.nl/index.php">&lt;code>atop&lt;/code>&lt;/a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &amp;ndash; in real time or &lt;em>historically&lt;/em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.&lt;/p></description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>&lt;h1 id="a-clumsy-docker-networking-notes">A clumsy Docker networking notes&lt;/h1>
+&lt;p>Nguồn:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ntk148v/til/tree/master/docker/networking">https://github.com/ntk148v/til/tree/master/docker/networking&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://argus-sec.com/docker-networking-behind-the-scenes/">https://argus-sec.com/docker-networking-behind-the-scenes/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/">https://docs.docker.com/network/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md">https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/engine/tutorials/networkingcontainers/">https://docs.docker.com/engine/tutorials/networkingcontainers/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/iptables/">https://docs.docker.com/network/iptables/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj">https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="khái-niệm">Khái niệm&lt;/h2>
+&lt;ul>
+&lt;li>
+&lt;p>Các khái niệm:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://man7.org/linux/man-pages/man8/ip-netns.8.html">Network namespace&lt;/a>:&lt;/p>
+&lt;ul>
+&lt;li>Trước khi đi vào network namespace, cần hiểu về &lt;strong>Namespace&lt;/strong>. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác). Tính năng này hoạt động bằng cách đưa tập các tài nguyên và process vào cùng một namespace, các namespace khác nhau sẽ tham chiếu đến các tài nguyên riêng biệt. Tài nguyên có thể tồn tại trong nhiều không gian. Ví dụ về các tài nguyên như vậy là process ID, hostname, user ID, tên file và một số tên (name) liên quan đến quyền truy cập mạng và giao tiếp giữa các process.&lt;/li>
+&lt;li>Networking namespace là một trong các loại namespace. Mỗi network namespace có &lt;a href="https://en.wikipedia.org/wiki/Network_stack">network stack&lt;/a> riêng: địa chỉ IP, network interface, route table, &amp;hellip;&lt;/li>
+&lt;li>Bạn có thể xem thao tác các network namespace bằng câu lệnh sau:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">$ sudo ip netns &amp;lt;sub-command&amp;gt;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://wiki.archlinux.org/index.php/Network_bridge">Network bridge&lt;/a>: một thiết bị mạng ảo chuyển tiếp các gói giữa hai hoặc nhiều phân đoạn mạng.&lt;/p></description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/recurse-center/README.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="recurse-center">Recurse Center&lt;/h1>
+&lt;p>Source: &lt;a href="https://www.recurse.com/">https://www.recurse.com/&lt;/a>&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-text" data-lang="text">&lt;span class="line">&lt;span class="cl">The retreat where curious programmers recharge and grow
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from &lt;a href="https://jvns.ca/blog/2017/09/17/how-i-spent-my-time-at-the-recurse-center/">Julia Evan&amp;rsquo;s blog&lt;/a>.&lt;/p>
+&lt;p>Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other. You will spnd six or 12 weeks programming at the edge of your abilities alongside motivated peers - at no cost to you.&lt;/p></description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>&lt;p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.&lt;/p>
+&lt;p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:&lt;/p>
+&lt;ul>
+&lt;li>Commands must be on a single line.&lt;/li>
+&lt;li>Arguments must be separated by whitespace.&lt;/li>
+&lt;li>No quoting arguments or escaping whitespace.&lt;/li>
+&lt;li>No piping or redirection.&lt;/li>
+&lt;/ul>
+&lt;blockquote>
+&lt;p>Before we start, make sure you have .NET Core environment and knownledge.&lt;/p></description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>This article is Golang version of &lt;a href="https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/">Asynchronous programming with async and await guideline&lt;/a>. They did really good job to demonstrate how asynchronous programming looks like.&lt;/p>
+&lt;p>You can find source code &lt;a href="https://github.com/ntk148v/testing/tree/master/golang/breakfast">here&lt;/a>.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Pour a cup of coffee.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Heat a pan, then fry two eggs.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Fry three slices of bacon.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">4. Toast two pieces of bread.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">5. Add butter and jam to the toast.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">6. Pour a glass of orange juice.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Each step takes time to finish, for example, you have to wait X seconds to make a glass of orange juice. Let&amp;rsquo;s write those instructions as Golang:&lt;/p></description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/ansible/molecule.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://molecule.readthedocs.io/en/latest/getting-started/">https://molecule.readthedocs.io/en/latest/getting-started/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule">https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>Table of contents:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#0-problem">0. Problem&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-play-with-molecule">2. Play with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#21-getting-started">2.1. Getting started&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#22-custom-docker-image">2.2. Custom Docker image&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#23-test-an-existing-role">2.3. Test an existing role&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#24-test-cluster">2.4. Test Cluster&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="0-problem">0. Problem&lt;/h2>
+&lt;p>You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:&lt;/p></description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>&lt;strong>Environment:&lt;/strong> Ubuntu 22.04, but it should work in other Linux distributions.&lt;/p>
+&lt;p>&lt;strong>Source&lt;/strong>: &lt;a href="https://www.sobyte.net/post/2023-03/linux-services-in-the-background/">https://www.sobyte.net/post/2023-03/linux-services-in-the-background/&lt;/a>&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?&lt;/p>
+
+&lt;div class="mermaid" align="center">
+graph TD
+A(You don't want to wait &lt;br>for a running command) --> B{Do you want to see output?}
+A --> C{Do you want the command to stay &lt;br>running after the session ends?}
+C --> |Yes| E(screen)
+B --> |No| D(Ctrl-Z or &amp;)
+B --> |Yes| F{Do you have requirements &lt;br>for log cutting, running users?}
+F --> |No| G(nohup)
+F --> |Yes| H(supervisor or systemd)
+&lt;/div>
+
+&lt;h2 id="ctrl-z-or-">Ctrl-Z or &amp;amp;&lt;/h2>
+&lt;p>For example, you have to excute &lt;code>ping&lt;/code> command:&lt;/p></description></item><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ A collection of interesting thoughts and opinions that I come across
+&lt;/blockquote>
+
+&lt;h2 id="willingness-to-look-stupid">Willingness to look stupid&lt;/h2>
+&lt;div align="center">
+ &lt;blockquote class="twitter-tweet">&lt;p lang="en" dir="ltr">Willingness to look stupid&lt;a href="https://t.co/0WrVAzLQ6g">https://t.co/0WrVAzLQ6g&lt;/a> &lt;a href="https://t.co/6NjysMwbch">pic.twitter.com/6NjysMwbch&lt;/a>&lt;/p>&amp;mdash; Dan Luu (@danluu) &lt;a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021&lt;/a>&lt;/blockquote> &lt;script async src="https://platform.twitter.com/widgets.js" charset="utf-8">&lt;/script>
+&lt;/div>
+&lt;p>I recently read &lt;a href="https://danluu.com/look-stupid/">this article&lt;/a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.&lt;/p>
+&lt;p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:. I&amp;rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &amp;hellip;). And I know that I&amp;rsquo;m not the only one, look smart but being stupid.&lt;/p></description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is from &lt;a href="https://github.com/ntk148v/til/blob/master/linux/network-performance-ultimate-guide.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;p>&lt;strong>Source&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/leandromoreira/linux-network-performance-parameters/">https://github.com/leandromoreira/linux-network-performance-parameters/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf">https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/">https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-achieve-low-latency/">https://blog.cloudflare.com/how-to-achieve-low-latency/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-receive-a-million-packets/">https://blog.cloudflare.com/how-to-receive-a-million-packets/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://beej.us/guide/bgnet/html/">https://beej.us/guide/bgnet/html/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.csdn.net/armlinuxww/article/details/111930788">https://blog.csdn.net/armlinuxww/article/details/111930788&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning">https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="linux-networking-stack">Linux Networking stack&lt;/h2>
+&lt;p>&lt;strong>Source:&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/">https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://juejin.cn/post/7106345054368694280">https://juejin.cn/post/7106345054368694280&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://openwrt.org/docs/guide-developer/networking/praxis">https://openwrt.org/docs/guide-developer/networking/praxis&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.51cto.com/u_15169172/2710604">https://blog.51cto.com/u_15169172/2710604&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://sn0rt.github.io/media/paper/TCPlinux.pdf">https://sn0rt.github.io/media/paper/TCPlinux.pdf&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8">https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>The complete network data flow:&lt;/p>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="http://web.archive.org/web/20170905131225if_/https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png" alt="">&lt;/p>
+&lt;ul>
+&lt;li>It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets.&lt;/li>
+&lt;li>Linux queue:&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://github.com/leandromoreira/linux-network-performance-parameters/raw/master/img/linux_network_flow.png" alt="">&lt;/p>
+&lt;p>&lt;strong>NOTE&lt;/strong>: The follow sections will heavily use &lt;code>sysctl&lt;/code>. If you don&amp;rsquo;t familiar with this command, take a look at &lt;a href="#204-sysctl">HOWTO#sysctl section&lt;/a>.&lt;/p></description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>&lt;h1 id="iptables">Iptables&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://www.thegeekstuff.com/2011/01/iptables-fundamentals/">https://www.thegeekstuff.com/2011/01/iptables-fundamentals/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html">https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture">https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/">https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/&lt;/a> - advanced&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="#iptables">Iptables&lt;/a>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-netfilter-hooks">2. Netfilter hooks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#3-iptables-tables-and-chains">3. iptables tables and chains&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#4-iptables-rules">4. iptables rules&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#5-iptables-drawbacks">5. iptables drawbacks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#6-iptables-trace">6. iptables TRACE&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="1-introduction">1. Introduction&lt;/h2>
+&lt;ul>
+&lt;li>iptables is used to manage packet filtering and NAT rules.&lt;/li>
+&lt;li>iptables works with the kernel &lt;code>netfilter&lt;/code> packet filtering framework.
+&lt;ul>
+&lt;li>iptables is replaced with &lt;code>nftables&lt;/code>, but &lt;code>iptables&lt;/code> syntax is still commonly used as a baseline.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>iptables on a high-level.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> chains
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rules
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-netfilter-hooks">2. Netfilter hooks&lt;/h2>
+&lt;ul>
+&lt;li>There are 4 netfilter hooks that programs can register with. As packets progress through the stack, they will trigger the kernel modules that have registered with these hooks.
+&lt;ul>
+&lt;li>&lt;code>NF_IP_PRE_ROUTING&lt;/code>: triggered by any incoming traffic very soon after entering network stack. This hook is processed before any routing decisions have been made regarding where to send the packet.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_IN&lt;/code>: triggered after an incoming packet has been routed if the packet is destined for the local system.&lt;/li>
+&lt;li>&lt;code>NF_IP_FORWARD&lt;/code>: triggered after an incoming packet has been routed if the packet is to be forwarded to another host.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_OUT&lt;/code>: triggered by any locally created outbound traffic as soon as it hits the network stack.&lt;/li>
+&lt;li>&lt;code>NF_IP_POST_ROUTING&lt;/code>: triggerd by any outgoing or forwarded traffic after routing has taken place and just before being sent out on the wire.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://people.netfilter.org/pablo/nf-hooks.png" alt="">&lt;/p></description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>&lt;p>Hey, this is a simple post to play with &lt;a href="https://github.com/blampe/goat">GoAT Diagram&lt;/a>.&lt;/p>
+
+
+
+&lt;div class="goat svg-container ">
+ 
+ &lt;svg
+ xmlns="http://www.w3.org/2000/svg"
+ font-family="Menlo,Lucida Console,monospace"
+ 
+ viewBox="0 0 760 841"
+ >
+ &lt;g transform='translate(8,16)'>
+&lt;path d='M 64,32 L 128,32' fill='none' stroke='currentColor'>&lt;/path>
+&lt;path d='M 176,32 L 192,32' fill='none' stroke='currentColor'>&lt;/path>
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+&lt;text text-anchor='middle' x='616' y='756' fill='currentColor' style='font-size:1em'>·&lt;/text>
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+&lt;text text-anchor='middle' x='640' y='308' fill='currentColor' style='font-size:1em'>L&lt;/text>
+&lt;text text-anchor='middle' x='640' y='388' fill='currentColor' style='font-size:1em'>S&lt;/text>
+&lt;text text-anchor='middle' x='648' y='308' fill='currentColor' style='font-size:1em'>A&lt;/text>
+&lt;text text-anchor='middle' x='648' y='388' fill='currentColor' style='font-size:1em'>e&lt;/text>
+&lt;text text-anchor='middle' x='648' y='788' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='656' y='308' fill='currentColor' style='font-size:1em'>N&lt;/text>
+&lt;text text-anchor='middle' x='656' y='388' fill='currentColor' style='font-size:1em'>r&lt;/text>
+&lt;text text-anchor='middle' x='656' y='772' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='656' y='804' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='664' y='388' fill='currentColor' style='font-size:1em'>v&lt;/text>
+&lt;text text-anchor='middle' x='664' y='756' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='664' y='788' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='664' y='820' fill='currentColor' style='font-size:1em'>·&lt;/text>
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+&lt;text text-anchor='middle' x='672' y='772' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='672' y='804' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='680' y='340' fill='currentColor' style='font-size:1em'>U&lt;/text>
+&lt;text text-anchor='middle' x='680' y='388' fill='currentColor' style='font-size:1em'>r&lt;/text>
+&lt;text text-anchor='middle' x='680' y='756' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='680' y='820' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='688' y='340' fill='currentColor' style='font-size:1em'>b&lt;/text>
+&lt;text text-anchor='middle' x='688' y='772' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='696' y='292' fill='currentColor' style='font-size:1em'>#&lt;/text>
+&lt;text text-anchor='middle' x='696' y='340' fill='currentColor' style='font-size:1em'>u&lt;/text>
+&lt;text text-anchor='middle' x='696' y='388' fill='currentColor' style='font-size:1em'>R&lt;/text>
+&lt;text text-anchor='middle' x='696' y='756' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='704' y='340' fill='currentColor' style='font-size:1em'>n&lt;/text>
+&lt;text text-anchor='middle' x='704' y='388' fill='currentColor' style='font-size:1em'>a&lt;/text>
+&lt;text text-anchor='middle' x='704' y='772' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='704' y='804' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='712' y='340' fill='currentColor' style='font-size:1em'>t&lt;/text>
+&lt;text text-anchor='middle' x='712' y='388' fill='currentColor' style='font-size:1em'>c&lt;/text>
+&lt;text text-anchor='middle' x='712' y='788' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='720' y='292' fill='currentColor' style='font-size:1em'>#&lt;/text>
+&lt;text text-anchor='middle' x='720' y='340' fill='currentColor' style='font-size:1em'>u&lt;/text>
+&lt;text text-anchor='middle' x='720' y='388' fill='currentColor' style='font-size:1em'>k&lt;/text>
+&lt;/g>
+
+ &lt;/svg>
+ 
+&lt;/div></description></item><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>&lt;div align="center">
+ &lt;iframe src="https://giphy.com/embed/777Aby0ZetYE8" width="480" height="259" frameBorder="0" class="giphy-embed" allowFullScreen>&lt;/iframe>&lt;p>&lt;a href="https://giphy.com/gifs/cute-think-pooh-777Aby0ZetYE8">via GIPHY&lt;/a>&lt;/p>
+ &lt;p>Haven't thought of anything, have you? No, neither have I. Think, think, think&lt;/p>
+&lt;/div>
+&lt;h2 id="the-feynman-algorithm">The Feynman Algorithm&lt;/h2>
+&lt;p>The &lt;a href="http://wiki.c2.com/?FeynmanAlgorithm">Feynman algorithm&lt;/a> was facetiously suggested by &lt;a href="http://en.wikipedia.org/wiki/Murray_Gell-Mann">Murray Gell-Mann&lt;/a>, a colleague of &lt;a href="https://en.wikipedia.org/wiki/Richard_Feynman">Richard Feynman&lt;/a>, in a New York Times interview.&lt;/p>
+&lt;p>It is the combination of three steps:&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Write down the problem.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Think real hard.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Write down the solution.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="polyas-principles">Polya&amp;rsquo;s Principles&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">If you can&amp;#39;t solve a problem, then there is an easier problem you can
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">solve: find it.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">-- George Poyla --
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>George Polya described in his 1957 book &lt;a href="https://en.wikipedia.org/wiki/How_to_Solve_It">How to Solve It&lt;/a> (HowToSolveIt) a set of heuristics for solving problems. A basic outline of his approach is pretty similar to Feynman&amp;rsquo;s Algorithm:&lt;/p></description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>&lt;h2 id="mission">Mission&lt;/h2>
+&lt;p>If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.&lt;/p>
+&lt;h2 id="docker-network">Docker network&lt;/h2>
+&lt;p>Let&amp;rsquo;s start with a fact that Docker manipulates &lt;code>iptables&lt;/code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named &lt;code>DOCKER&lt;/code>, &lt;code>DOCKER-USER&lt;/code> and &lt;code>DOCKER-ISOLATION-STAGE-*&lt;/code>, and it ensures that incoming packets are always checked by these chains first.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables -L -n
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge. You may want to check &lt;a href="https://github.com/ntk148v/til/blob/master/docker/networking/README.md">Docker network note&lt;/a>. I will only show iptables packet flow: For example, we have a host with ip 10.0.10.26, then start a container that is exposed port 8000 to internet.&lt;/p></description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>&lt;p>I&amp;rsquo;ve used &lt;a href="./lets-comment.md">Utterances&lt;/a> for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - &lt;a href="https://github.com/giscus/giscus">Giscus&lt;/a>. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.&lt;/p>
+&lt;p>So..&lt;/p>
+&lt;h2 id="why-migrate">Why migrate?&lt;/h2>
+&lt;ul>
+&lt;li>&lt;strong>Post reactions&lt;/strong>: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself. giscus provides this feature.&lt;/li>
+&lt;li>&lt;strong>Conversation view&lt;/strong>: utterances will simply render comments as a list in the order they have been created. Giscus groups replies to a comment instead. I mean comment is about discussion, right?&lt;/li>
+&lt;/ul>
+&lt;h2 id="prepare-your-site">Prepare your site&lt;/h2>
+&lt;ul>
+&lt;li>Migrate from utterances: &lt;a href="https://docs.github.com/en/discussions/managing-discussions-for-your-community/moderating-discussions#converting-an-issue-to-a-discussion">convert the existing issues into discussions&lt;/a>.&lt;/li>
+&lt;li>Follow &lt;a href="https://giscus.app/">Giscus&lt;/a>, it&amp;rsquo;s quite simple.&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>Leave a comment :point_down:&lt;/code>&lt;/p></description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>&lt;p>According to &lt;a href="https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/">Reddis post&lt;/a> and &lt;a href="https://github.com/Airblader/i3/issues/167">i3-gaps issue&lt;/a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-328562433">doesn&amp;rsquo;t like it&lt;/a>. But nevermind, we still have two ways to achieve it.&lt;/p>
+&lt;h2 id="rounded-i3-gaps">Rounded i3-gaps&lt;/h2>
+&lt;p>&lt;a href="https://github.com/resloved">Resloved&lt;/a> have an awesome &lt;a href="https://github.com/resloved/i3">fork&lt;/a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it &lt;a href="https://github.com/ntk148v/i3">here&lt;/a>.&lt;/p>
+&lt;ul>
+&lt;li>Install i3-gaps.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Dependencies&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-util0-dev libxcb-icccm4-dev libyajl-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libstartup-notification0-dev libxcb-randr0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libev-dev libxcb-cursor-dev libxcb-xinerama0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> autoconf libxcb-xrm0 libxcb-xrm-dev automake i3status &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> ninja-build meson libxcb-shape0-dev build-essential -y
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ntk148v/i3.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> i3/
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Compile&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mkdir -p build &lt;span class="o">&amp;amp;&amp;amp;&lt;/span> &lt;span class="nb">cd&lt;/span> build
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">meson ..
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">ninja
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo ninja install
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Configure rounded corners by adding this to your config.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">border_radius 10
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result, but you can see that these corners look so jagged (check out this &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-485263770">comment&lt;/a>).&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-1.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-4.png">
+&lt;/figure>
+
+&lt;h2 id="picom">picom&lt;/h2>
+&lt;ul>
+&lt;li>You can also achieve rounded corners by using &lt;a href="https://github.com/yshui/picom">picom&lt;/a>.&lt;/li>
+&lt;li>Install picom.&lt;/li>
+&lt;li>Configure rounded corners by changing &lt;code>corner_radius&lt;/code> value.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl"># Path ~/.config/picom.conf
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">corner_radius: 10;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result looks much smoother.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-2.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-3.png">
+&lt;/figure></description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>&lt;ul>
+&lt;li>Rename a single file with &lt;code>mv&lt;/code>. Just a basic thing.&lt;/li>
+&lt;li>Rename multiple files with &lt;code>mv&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Rename files with suffix .yaml to yml&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">for&lt;/span> f in *.yaml&lt;span class="p">;&lt;/span> &lt;span class="k">do&lt;/span> mv -- &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="nv">$f&lt;/span>&lt;span class="s2">&amp;#34;&lt;/span> &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="si">${&lt;/span>&lt;span class="nv">f&lt;/span>&lt;span class="p">%.yaml&lt;/span>&lt;span class="si">}&lt;/span>&lt;span class="s2">.yml&amp;#34;&lt;/span> &lt;span class="k">done&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Rename multiple files with &lt;code>rename&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Install rename command&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install rename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># RedHat-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo yum install prename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># The follow examples are performed in Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/.yaml/.yml/&amp;#39;&lt;/span> *.yaml
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/prev_/next_&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Delete part of a filename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/next_//&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Limit changes to specific parts of filenames&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Only change the files that start with &amp;#34;paramater&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/^param/parameter/&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Search with grouping&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;string&amp;#34; and &amp;#34;strong&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/(str|stro)ng/strength&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Use translations with rename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Force filenames to uppercase&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;y/a-z/A-Z&amp;#39;&lt;/span> *.py
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># More?&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">man rename
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;a href="https://github.com/ntk148v/goignore">Goignore&lt;/a> - A &lt;code>.gitignore&lt;/code> wizard which gnerates &lt;code>.gitignore&lt;/code> files from the command line for you. Inspired by &lt;a href="https://github.com/karan/joe">joe&lt;/a>
+&lt;/blockquote>
+
+&lt;h2 id="features">Features&lt;/h2>
+&lt;ul>
+&lt;li>No installation necessary - just use the binary.&lt;/li>
+&lt;li>Works on Linux, Windows &amp;amp; MacOS.&lt;/li>
+&lt;li>Interactive user interface with &lt;a href="https://github.com/charmbracelet/bubbletea">bubbletea&lt;/a>: Pagination, Filtering, Help&amp;hellip;&lt;/li>
+&lt;li>Supports all Github-supported &lt;a href="https://github.com/github/gitignore.git">.gitignore files&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="install">Install&lt;/h2>
+&lt;ul>
+&lt;li>Download the latest binary from the &lt;a href="https://github.com/ntk148v/goignore/releases">Release page&lt;/a>. It&amp;rsquo;s the easiest way to get started with &lt;code>goignore&lt;/code>.&lt;/li>
+&lt;li>Make sure to add the location of the binary to your &lt;code>$PATH&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="usage">Usage&lt;/h2>
+&lt;ul>
+&lt;li>Just run.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">chmod a+x goignore
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">goignore
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>
+&lt;p>At the first time, &lt;code>goignore&lt;/code> will download the Gitignore templates from Github. It may take a few seconds (depend on your network).&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>&lt;h2 id="bat---cat-alternative">bat - (cat alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/bat">bat&lt;/a>: A cat(1) clone with syntax highlighting and Git integration.&lt;/li>
+&lt;li>Example:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/bat.png">
+&lt;/figure>
+
+&lt;h2 id="fd---find-alternative">fd - (find alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/fd">fd&lt;/a>: a simple, fast and user-friendly alternative to &lt;code>find&lt;/code>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg">
+&lt;/figure>
+
+&lt;h2 id="httpie---wgetcurl-alternative">httpie - (wget/curl alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://httpie.io">httpie&lt;/a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Hello world&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http httpie.io/hello
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Custom HTTP method, HTTP headers and JSON data&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http PUT pie.dev/put X-API-Token:123 &lt;span class="nv">name&lt;/span>&lt;span class="o">=&lt;/span>John
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Submitting forms&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http -f POST pie.dev/post &lt;span class="nv">hello&lt;/span>&lt;span class="o">=&lt;/span>World
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Upload a file using redirect input&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http pie.dev/post &amp;lt; files/data.json
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://httpie.io&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="ripgrep---grep-alternative">ripgrep - (grep alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep">ripgrep&lt;/a>: a faster &lt;code>grep&lt;/code>. ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.&lt;/li>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep#quick-examples-comparing-tools">Benchmark&lt;/a>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Basic use&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg fast README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Regular expressions&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fast\w+&amp;#39;&lt;/span> README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Recursive search - recursively searching the directory (current directory is default)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fn write\(&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="delta">delta&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/dandavison/delta">delta&lt;/a>: Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.&lt;/li>
+&lt;li>Diff/git diff doesn&amp;rsquo;t show you exactly what was changed.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/git-diff.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Delta shows within-line highlights based on a Levenshtein edit inference algorithm.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/delta.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>By default, delta restructures the git output slightly to make the hunk markers human-readable:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://user-images.githubusercontent.com/52205/81059276-254cf980-8e9e-11ea-95c3-8b757a4c11b5.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Example config:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>core&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> pager: delta
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>delta&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> plus-style: &lt;span class="s2">&amp;#34;syntax #98c379&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> minus-style: &lt;span class="s2">&amp;#34;syntax #e06c75&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> syntax-theme: OneHalfDark
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> navigate: &lt;span class="nb">true&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> features: line-numbers decorations
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>interactive&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> diffFilter: delta --color-only
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Completely replace &lt;code>diff&lt;/code> with &lt;code>delta&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">diff&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;delta&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="z">z&lt;/h2>
+&lt;ul>
+&lt;li>Tired for &lt;code>cd&lt;/code>ing into the same directories over and over? Save your time with &lt;code>z&lt;/code> command!&lt;/li>
+&lt;li>&lt;a href="https://github.com/rupa/z">z&lt;/a>: jump around. Z is a shell script that makes jumping around your file directory pleasantly simple. Instead of trying to remember the exact path of where you need to go, or worse, &lt;code>cd&lt;/code>ing into the next directory followed by &lt;code>ls&lt;/code>ing and then cding again over and over (we’ve all been there), Z allows you to “lazy type” where you want to go and it’ll handle the rest.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Takes me to my workspace folder from anywhere.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ z workspace
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="fzf">fzf&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/junegunn/fzf">fzf&lt;/a>: fzf is a general-purpose command-line fuzzy finder.&lt;/li>
+&lt;li>It&amp;rsquo;s an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Read the list from STDIN and write the selected item to STDOUT&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ find * -type f &lt;span class="p">|&lt;/span> fzf &amp;gt; selected
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim &lt;span class="k">$(&lt;/span>fzf&lt;span class="k">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># COMMAND **&amp;lt;TAB&amp;gt;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under the current directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># - You can select multiple items with TAB key&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under your home directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ~/**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under current directory (single-selection)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under ~/github that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> ~/github/fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Can select multiple processes with &amp;lt;TAB&amp;gt; or &amp;lt;Shift-TAB&amp;gt; keys&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">kill&lt;/span> -9 &amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unset&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">export&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unalias&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/junegunn/fzf&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-vim.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-cd.png">
+&lt;/figure>
+
+&lt;h2 id="thefuck">thefuck&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/nvbn/thefuck">thefuck&lt;/a>: Magnificent app which corrects your previous console command.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ apt-get install vim
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Could not open lock file /var/lib/dpkg/lock - open &lt;span class="o">(&lt;/span>13: Permission denied&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Unable to lock the administration directory &lt;span class="o">(&lt;/span>/var/lib/dpkg/&lt;span class="o">)&lt;/span>, are you root?
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ fuck
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt-get install vim &lt;span class="o">[&lt;/span>enter/↑/↓/ctrl+c&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">Reading package lists... Done
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">...
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://github.com/nvbn/thefuck&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="exa---ls-alternative">exa - (ls alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://the.exa.website">exa&lt;/a>: A modern replacement for ls. &lt;code>exa&lt;/code> is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Completely replace &lt;code>ls&lt;/code> with &lt;code>exa&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">ls&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;exa&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa-ls.png">
+&lt;/figure></description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Environment Ubuntu 20.04&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="dependencies">Dependencies&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ujjwal96/xwinwrap">Xwinwrap&lt;/a>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ujjwal96/xwinwrap.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo make install
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make clean
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Gifsicle:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install gifsicle
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="the-helper-script">The helper script&lt;/h2>
+&lt;p>A helper script to setup animated .gif in dual monitors.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="cp">#!/bin/bash
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="cp">&lt;/span>&lt;span class="c1"># Uses xwinwrap to display given animated .gif in dual monitors.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">if&lt;/span> &lt;span class="o">[&lt;/span> &lt;span class="nv">$#&lt;/span> -ne &lt;span class="m">1&lt;/span> &lt;span class="o">]&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="k">then&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">echo&lt;/span> 1&amp;gt;&lt;span class="p">&amp;amp;&lt;/span>&lt;span class="m">2&lt;/span> Usage: &lt;span class="nv">$0&lt;/span> image.gif
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">exit&lt;/span> &lt;span class="m">1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">fi&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">gif&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nv">$1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 gifview
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Get monitors resolution&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR1&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR2&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;!/primary/ &amp;amp;&amp;amp; /connected/ { print $3 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR1&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR2&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>If you want to run xwinwrap by yourself, here is the example:&lt;/p></description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>&lt;h2 id="what-is-swap">What is Swap?&lt;/h2>
+&lt;p>Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.&lt;/p>
+&lt;h2 id="swap-partition-size">Swap partition size&lt;/h2>
+&lt;h3 id="old-rule-of-thumb">Old rule of thumb&lt;/h3>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">swap: 2 * the-amount-of-RAM
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time. Nowadays, RAM has become a &lt;code>cheap&lt;/code> &amp;amp; &lt;code>affordable&lt;/code> commondity, so the 2x rule is outdated.&lt;/p></description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">Ansitheus: Ansible + Prometheus
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="prometheus-overview">Prometheus overview&lt;/h2>
+&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Checkout the &lt;a href="https://prometheus.io/docs/introduction/overview/">Prometheus official documentation&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;p>&lt;a href="https://github.com/prometheus">Prometheus&lt;/a> is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.&lt;/p>
+&lt;h3 id="features">Features&lt;/h3>
+&lt;ul>
+&lt;li>a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs&lt;/li>
+&lt;li>PromQL, a flexible query language to leverage this dimensionality&lt;/li>
+&lt;li>no reliance on distributed storage; single server nodes are autonomous&lt;/li>
+&lt;li>time series collection happens via a pull model over HTTP&lt;/li>
+&lt;li>pushing time series is supported via an intermediary gateway&lt;/li>
+&lt;li>targets are discovered via service discovery or static configuration&lt;/li>
+&lt;li>multiple modes of graphing &amp;amp; dashboarding support&lt;/li>
+&lt;/ul>
+&lt;h3 id="architecture--components">Architecture &amp;amp; components&lt;/h3>
+&lt;p>Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. It stores all scraped samples locally &amp;amp; runs rules over this data to either aggregate &amp;amp; record new time series from existing data or generate alerts. Grafana or other API consumers can be used to visualize the collected data.&lt;/p></description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: This is my perspective aggregation. You can easily find these such of knowledges in &lt;a href="#5-references">the references&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="context">Context&lt;/h2>
+&lt;p>Etcd Version &lt;code>v3.4.0&lt;/code>.&lt;/p>
+&lt;h2 id="requirements">Requirements&lt;/h2>
+&lt;h3 id="number-of-nodes">Number of nodes&lt;/h3>
+&lt;ul>
+&lt;li>&amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with &lt;strong>n-members&lt;/strong>, quorum is &lt;strong>(n/2)+1&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;h3 id="cpus">CPUs&lt;/h3>
+&lt;ul>
+&lt;li>Etcd doesn&amp;rsquo;t require a lot of CPU capacity.&lt;/li>
+&lt;li>Typical clusters need &lt;strong>2-4 cores&lt;/strong> to run smoothly.&lt;/li>
+&lt;/ul>
+&lt;h3 id="memory">Memory&lt;/h3>
+&lt;ul>
+&lt;li>Etcd performance depends on having enough memory (cache key-value data, tracking watchers&amp;hellip;).&lt;/li>
+&lt;li>Typical &lt;strong>8GB&lt;/strong> is enough.&lt;/li>
+&lt;/ul>
+&lt;h3 id="disk">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd cluster is very sensitive to disk latencies. Since etcd must persist proposals to its log, disk activity from other processes may cause long &lt;code>fsync&lt;/code> latencies. The upshot is etcd may miss heartbeats, causing request timeouts and temporary leader loss. An etcd server can sometimes stably run alongside these processes when given a high disk priority.&lt;/li>
+&lt;li>Check whether a disk is fast enough for etcd using &lt;a href="https://github.com/axboe/fio">fio&lt;/a>. If the 99th percentile of fdatasync is &lt;strong>&amp;lt;10ms&lt;/strong>, your storage is ok.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ fio --rw&lt;span class="o">=&lt;/span>write --ioengine&lt;span class="o">=&lt;/span>sync --fdatasync&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --directory&lt;span class="o">=&lt;/span>test-data &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> --size&lt;span class="o">=&lt;/span>22m --bs&lt;span class="o">=&lt;/span>&lt;span class="m">2300&lt;/span> --name&lt;span class="o">=&lt;/span>mytest
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>&lt;strong>SSD&lt;/strong> is recommended.&lt;/li>
+&lt;/ul>
+&lt;h3 id="network">Network&lt;/h3>
+&lt;ul>
+&lt;li>Etcd cluster should be deployed in a fast and reliable network. Low latency ensures etcd members can communicate fast. High bandwidth can reduce the time to recover a failed etcd member.&lt;/li>
+&lt;li>&lt;strong>1GbE&lt;/strong> is sufficient for common etcd.&lt;/li>
+&lt;li>Note that the network isn&amp;rsquo;t the only source of latency. Each request and response may be impacted by slow disks on both the leader and followers.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tuning">Tuning&lt;/h2>
+&lt;h3 id="time-parameters">Time parameters&lt;/h3>
+&lt;ul>
+&lt;li>&lt;code>Heartbeat interval&lt;/code>.
+&lt;ul>
+&lt;li>The frequency with which the leader will notify followers that it is still the leader.&lt;/li>
+&lt;li>Default: &lt;strong>100ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>Around 0.5-1.5 x round-trip time (RTT) between members&lt;/strong>. Measure RTT with &lt;code>ping&lt;/code>.&lt;/li>
+&lt;li>Tradeoff: Too low -&amp;gt; etcd will send unnecessary messages -&amp;gt; increase the usage of CPU and network resources. Too high -&amp;gt; leads to high election timeout.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>&lt;code>Election timeout&lt;/code>.
+&lt;ul>
+&lt;li>How long a follower node will go without hearing a heartbeat before attempting to become leader itself.&lt;/li>
+&lt;li>Default: &lt;strong>1000ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>&amp;gt;= 10 x RTT and &amp;lt; 50s&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>The heartbeat interval and election timeout value should be &lt;strong>the same for all members in one cluster&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --heartbeat-interval&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> --election-timeout&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_HEARTBEAT_INTERVAL&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> &lt;span class="nv">ETCD_ELECTION_TIMEOUT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="disk-1">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd server can sometimes stably run alongside these processes when given a high disk priority using &lt;a href="https://linux.die.net/man/1/ionice">ionice&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># best effort, highest priority&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ sudo ionice -c2 -n0 -p &lt;span class="sb">`&lt;/span>pgrep etcd&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="snapshot">Snapshot&lt;/h3>
+&lt;ul>
+&lt;li>etcd appends all key changes to a log file -&amp;gt; huge log that grows forever :point_up:&lt;/li>
+&lt;li>Solution: Make periodic snapshots (save the current and remove old logs).&lt;/li>
+&lt;li>Default: make snapshots after every &lt;strong>10 000 changes&lt;/strong>.&lt;/li>
+&lt;li>Tuning: Just in case that etcd&amp;rsquo;s memory and disk usage is too high, lower threshold.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --snapshot-count&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_SNAPSHOT_COUNT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="maintenance">Maintenance&lt;/h2>
+&lt;h3 id="history-compaction">History compaction&lt;/h3>
+&lt;ul>
+&lt;li>Etcd keeps an exact history of its keyspace, the history should be periodically compacted to avoid performance degradation and eventual storage space exhaustion.&lt;/li>
+&lt;li>Etcd can be set to automatically compact the keyspace with the &lt;code>--auto-compaction-*&lt;/code> option with a period of hours.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># keep one hour of history&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --auto-compaction-retention&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --auto-compaction-mode&lt;span class="o">=&lt;/span>periodic
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Compaction modes:
+&lt;ul>
+&lt;li>Revision-based: &lt;code>--auto-compaction-mode=revision --auto-compaction-retention=1000&lt;/code> automatically Compact on &amp;ldquo;latest revision&amp;rdquo; - 1000 every 5-minute (when latest revision is 30000, compact on revision 29000). Use this when having a large keyspace.&lt;/li>
+&lt;li>Periodic: &lt;code>--auto-compaction-mode=periodic --auto-compaction-retention=72h&lt;/code> automatically Compact with 72-hour retention window every 1-hour. Use this when having a huge number of revisions for a key-value pair.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h3 id="defragmentation">Defragmentation&lt;/h3>
+&lt;ul>
+&lt;li>Compacting old revisions internally fragments etcd by leaving gaps in backend database - &lt;code>internal fragmentation&lt;/code>.&lt;/li>
+&lt;li>Internal fragmentation space is available for use by etcd but unavailable to the host filesystem.&lt;/li>
+&lt;li>Solution: Release this space back to the filesystem with defrag.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ etcdctl defrag
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>It should be run rather infrequently, as there is always going to be an unavoidable pause.&lt;/li>
+&lt;/ul>
+&lt;h2 id="references">References&lt;/h2>
+&lt;ul>
+&lt;li>Etcd hardware: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md">https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md&lt;/a>&lt;/li>
+&lt;li>Etcd tuning: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md">https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md&lt;/a>&lt;/li>
+&lt;li>Etcd maintainence: &lt;a href="https://etcd.io/docs/v3.4.0/op-guide/maintenance/">https://etcd.io/docs/v3.4.0/op-guide/maintenance/&lt;/a>&lt;/li>
+&lt;/ul></description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>&lt;p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:&lt;/p>
+&lt;h2 id="references">References&lt;/h2>
+&lt;p>Firstly give them some credits:&lt;/p>
+&lt;ol>
+&lt;li>&lt;a href="https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/">https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://pliutau.com/different-ways-to-block-go-runtime-forever/">https://pliutau.com/different-ways-to-block-go-runtime-forever/&lt;/a>&lt;/li>
+&lt;/ol>
+&lt;blockquote>
+&lt;p>NOTE: I run these with Golang 1.12&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="the-original">The original&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">1000&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="c1">// The main goroutine is exited before the show() be done.
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="bad---an-empty-infinite-loop">Bad - An empty infinite loop&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="p">(&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;time&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="c1">// Empty, just do nothing
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">5&lt;/span> &lt;span class="o">*&lt;/span> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nx">Second&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>An infinite loop here is a busy loop that does nothing except burn CPU time.&lt;/p></description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>&lt;p>&lt;img src="./theundefeated-kobe-bryant.pg" alt="">&lt;/p>
+&lt;p>Source: &lt;a href="https://theundefeated.com/features/kobe-vs-kobe-bryant-lakers-numbers-8-and-24-jersey-retirement/">The Undefeated&lt;/a>&lt;/p>
+&lt;p>I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.&lt;/p>
+&lt;p>Rest In Peace Mamba :basketball:&lt;/p>
+&lt;p>&lt;img src="./kobe.jpg" alt="">&lt;/p></description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>&lt;p>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.&lt;/p>
+&lt;p>That&amp;rsquo;s why I choose a Disqus alternative - &lt;a href="https://utteranc.es/">Utterances&lt;/a>. Utterances is a lightweight comments widget built on Github issues. Use Github issues for blog comments, wiki pages and more!&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/posts/iptables/index.html b/posts/iptables/index.html
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@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ=" as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href="/css/toigian.min.5302434c6bf6c964212d042fe887c2c122c8be67cbd44532216013244c9ed994.css" integrity="sha256-UwJDTGv2yWQhLQQv6IfCwSLIvmfL1EUyIWATJEye2ZQ="></noscript><link rel=stylesheet type=text/css href="/css/light.min.29febe5c26ca625f7e2913e2509889a65637f415171eb003603102dea7cc42e0.css" integrity="sha256-Kf6+XCbKYl9+KRPiUJiJplY39BUXHrADYDEC3qfMQuA="><link rel=stylesheet type=text/css href="/css/dark.min.47fea451289f4f246c4875ba0aa5f6376183f220c766f5e90d15d6e48cb7b937.css" integrity="sha256-R/6kUSifTyRsSHW6CqX2N2GD8iDHZvXpDRXW5Iy3uTc="><script>localStorage.theme==="dark"||!("theme"in localStorage)&&window.matchMedia("(prefers-color-scheme: dark)").matches?document.documentElement.classList.add("dark"):document.documentElement.classList.remove("dark")</script><script async defer src=/js/main.dfa968b06ebe7fb755eb156f7296445f20bd5ca0c82aa2eb755b1bfac4e2f294676471cf7670590073c364901a0dd5dc4b4c7b83f7a4a3c3b081f085c78fa1de.js integrity="sha512-36losG6+f7dV6xVvcpZEXyC9XKDIKqLrdVsb+sTi8pRnZHHPdnBZAHPDZJAaDdXcS0x7g/eko8OwgfCFx4+h3g=="></script><script src=https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js></script><script>mermaid.initialize({startOnLoad:!0,securityLevel:"loose"})</script></head><body><header style=--layer:10><div aria-hidden=true class="absolute top-[-1000px] left-0 z-[calc(var(--layer)+1)] h-[calc(1000px+var(--page-top))] w-full bg-base"></div><div class="fixed top-0 left-0 z-[var(--layer)] flex h-header-height w-full items-center border-b px-page-gutter before:absolute before:inset-0 before:z-[-1] before:bg-base [@supports(backdrop-filter:blur(0))]:before:bg-base [@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/iptables/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Iptables</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/iptables/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Iptables</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Iptables</h1><time class="text-sm italic tabular-nums text-muted">2023/02/24&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/linux/ id=tag>Linux</a></div><div id=toc></div><div class=content><h1 id=iptables>Iptables</h1><p>Source:</p><ul><li><p><a href=https://www.thegeekstuff.com/2011/01/iptables-fundamentals/>https://www.thegeekstuff.com/2011/01/iptables-fundamentals/</a></p></li><li><p><a href=https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html>https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html</a></p></li><li><p><a href=https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture>https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture</a></p></li><li><p><a href=https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/>https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/</a> - advanced</p></li><li><p><a href=#iptables>Iptables</a></p><ul><li><a href=#1-introduction>1. Introduction</a></li><li><a href=#2-netfilter-hooks>2. Netfilter hooks</a></li><li><a href=#3-iptables-tables-and-chains>3. iptables tables and chains</a></li><li><a href=#4-iptables-rules>4. iptables rules</a></li><li><a href=#5-iptables-drawbacks>5. iptables drawbacks</a></li><li><a href=#6-iptables-trace>6. iptables TRACE</a></li></ul></li></ul><h2 id=1-introduction>1. Introduction</h2><ul><li>iptables is used to manage packet filtering and NAT rules.</li><li>iptables works with the kernel <code>netfilter</code> packet filtering framework.<ul><li>iptables is replaced with <code>nftables</code>, but <code>iptables</code> syntax is still commonly used as a baseline.</li></ul></li><li>iptables on a high-level.</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>iptables
 </span></span><span class=line><span class=cl>    tables
diff --git a/posts/lets-comment/index.html b/posts/lets-comment/index.html
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 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a></div><div id=toc></div><div class=content><p>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&mldr; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.</p><p>That&rsquo;s why I choose a Disqus alternative - <a href=https://utteranc.es/>Utterances</a>. Utterances is a lightweight comments widget built on Github issues. Use Github issues for blog comments, wiki pages and more!</p><ul><li><p>Open source. 🙌</p></li><li><p>No tracking, no ads, always free. 📡🚫</p></li><li><p>No lock-in. All data stored in GitHub issues. 🔓</p></li><li><p>Styled with Primer, the css toolkit that powers GitHub. 💅</p></li><li><p>Lightweight. Vanilla TypeScript. No font downloads, JavaScript frameworks or polyfills for evergreen browsers. 🐦🌲</p></li></ul><blockquote><p>All these above lines are stolen from Utterances home page!</p></blockquote><p>Setting up Utterances is quite simple, just follow the home page instruction and you will get what you want.</p><p>So, let&rsquo;s post some comments here.</p></div><div class=mt-16><script src=https://giscus.app/client.js data-repo=ntk148v/ntk148v.github.io data-repo-id=R_kgDOIWtaXA data-category="Show and tell" data-category-id=DIC_kwDOIWtaXM4CSU-P data-mapping=pathname data-strict=0 data-reactions-enabled=1 data-emit-metadata=0 data-input-position=bottom data-theme=preferred_color_scheme data-lang=en crossorigin=anonymous async></script></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/posts/linux-network-performance-ultimate-guide/index.html b/posts/linux-network-performance-ultimate-guide/index.html
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--- a/posts/linux-network-performance-ultimate-guide/index.html
+++ b/posts/linux-network-performance-ultimate-guide/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2024/07/19&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/linux/ id=tag>Linux</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#linux-networking-stack>Linux Networking stack</a><ol><li><a href=#linux-network-packet-reception>Linux network packet reception</a></li><li><a href=#linux-kernel-network-transmission>Linux kernel network transmission</a></li></ol></li><li><a href=#network-performance-tuning>Network Performance tuning</a><ol><li><a href=#quick-howto>Quick HOWTO</a><ol><li><a href=#procnetsoftnet_stat--procnetsockstat><code>/proc/net/softnet_stat</code> & <code>/proc/net/sockstat</code></a></li><li><a href=#ss><code>ss</code></a></li><li><a href=#netstat><code>netstat</code></a></li><li><a href=#sysctl><code>sysctl</code></a></li></ol></li><li><a href=#the-nic-ring-buffer>The NIC Ring Buffer</a></li><li><a href=#interrupt-coalescence-ic---rx-usecs-tx-usecs-rx-frames-tx-frames-hardware-irq>Interrupt Coalescence (IC) - rx-usecs, tx-usecs, rx-frames, tx-frames (hardware IRQ)</a></li><li><a href=#irq-affinity>IRQ Affinity</a></li><li><a href=#share-the-load-of-packet-processing-among-cpus>Share the load of packet processing among CPUs</a><ol><li><a href=#receive-side-scaling-rss>Receive-side scaling (RSS)</a></li><li><a href=#receive-packet-steering-rps>Receive Packet Steering (RPS)</a></li><li><a href=#receive-flow-steering-rfs>Receive Flow Steering (RFS)</a></li><li><a href=#accelerated-receive-flow-steering-arfs>Accelerated Receive Flow Steering (aRFS)</a></li></ol></li><li><a href=#interrupt-coalescing-soft-irq>Interrupt Coalescing (soft IRQ)</a></li><li><a href=#ingress-qdisc>Ingress QDisc</a></li><li><a href=#egress-disc---txqueuelen-and-default_qdisc>Egress Disc - txqueuelen and default_qdisc</a></li><li><a href=#tcp-read-and-write-buffersqueues>TCP Read and Write Buffers/Queues</a></li><li><a href=#tcp-fsm-and-congestion-algorithm>TCP FSM and congestion algorithm</a></li><li><a href=#numa>NUMA</a></li><li><a href=#further-more---packet-processing>Further more - Packet processing</a><ol><li><a href=#af_packet-v4><code>AF_PACKET</code> v4</a></li><li><a href=#packet_mmap><code>PACKET_MMAP</code></a></li><li><a href=#kernel-bypass-data-plane-development-kit-dpdk>Kernel bypass: Data Plane Development Kit (DPDK)</a></li><li><a href=#pf_ring>PF_RING</a></li><li><a href=#programmable-packet-processing-express-data-path-xdp>Programmable packet processing: eXpress Data Path (XDP)</a></li></ol></li></ol></li></ol></nav></div></details></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">The following content is from <a href=https://github.com/ntk148v/til/blob/master/linux/network-performance-ultimate-guide.md>my #til github</a>.</blockquote><p><strong>Source</strong></p><ul><li><a href=https://github.com/leandromoreira/linux-network-performance-parameters/>https://github.com/leandromoreira/linux-network-performance-parameters/</a></li><li><a href=https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf>https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf</a></li><li><a href=https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/>https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/</a></li><li><a href=https://blog.cloudflare.com/how-to-achieve-low-latency/>https://blog.cloudflare.com/how-to-achieve-low-latency/</a></li><li><a href=https://blog.cloudflare.com/how-to-receive-a-million-packets/>https://blog.cloudflare.com/how-to-receive-a-million-packets/</a></li><li><a href=https://beej.us/guide/bgnet/html/>https://beej.us/guide/bgnet/html/</a></li><li><a href=https://blog.csdn.net/armlinuxww/article/details/111930788>https://blog.csdn.net/armlinuxww/article/details/111930788</a></li><li><a href="https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning">https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning</a></li></ul><h2 id=linux-networking-stack>Linux Networking stack</h2><p><strong>Source:</strong></p><ul><li><p><a href=https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/>https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/</a></p></li><li><p><a href=https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/>https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/</a></p></li><li><p><a href=https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/>https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/</a></p></li><li><p><a href=https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/>https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/</a></p></li><li><p><a href=https://juejin.cn/post/7106345054368694280>https://juejin.cn/post/7106345054368694280</a></p></li><li><p><a href=https://openwrt.org/docs/guide-developer/networking/praxis>https://openwrt.org/docs/guide-developer/networking/praxis</a></p></li><li><p><a href=https://blog.51cto.com/u_15169172/2710604>https://blog.51cto.com/u_15169172/2710604</a></p></li><li><p><a href=https://sn0rt.github.io/media/paper/TCPlinux.pdf>https://sn0rt.github.io/media/paper/TCPlinux.pdf</a></p></li><li><p><a href=https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8>https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8</a></p></li><li><p>The complete network data flow:</p></li></ul><p><img src=http://web.archive.org/web/20170905131225if_/https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png alt></p><ul><li>It&rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets.</li><li>Linux queue:</li></ul><p><img src=https://github.com/leandromoreira/linux-network-performance-parameters/raw/master/img/linux_network_flow.png alt></p><p><strong>NOTE</strong>: The follow sections will heavily use <code>sysctl</code>. If you don&rsquo;t familiar with this command, take a look at <a href=#204-sysctl>HOWTO#sysctl section</a>.</p><h3 id=linux-network-packet-reception>Linux network packet reception</h3><ul><li><p>You check the detailed version at <a href=https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data>PackageCloud&rsquo;s article</a>.</p><details><summary>Click to expand</summary>- In network devices, it is common for the NIC to raise an **IRQ** to signal that a packet has arrived and is ready to be processed.
 - An IRQ (Interrupt Request) is a hardware signal sent to the processor instructing it to suspend its current activity and handle some external event, such as a keyboard input or a mouse movement.
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hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/linux-run-in-the-background/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Linux Run in the Background</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Linux Run in the Background</h1><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/linux/ id=tag>Linux</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#ctrl-z-or->Ctrl-Z or &</a></li><li><a href=#screen>screen</a></li><li><a href=#nohup>nohup</a></li><li><a href=#supervisor>supervisor</a></li><li><a href=#systemd>systemd</a></li></ol></nav></div></details></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-iris"><p><strong>Environment:</strong> Ubuntu 22.04, but it should work in other Linux distributions.</p><p><strong>Source</strong>: <a href=https://www.sobyte.net/post/2023-03/linux-services-in-the-background/>https://www.sobyte.net/post/2023-03/linux-services-in-the-background/</a></p></blockquote><p>You run some commands, it may take a long time to execute, and you don&rsquo;t want to wait for it. So what should you do in that scenario?</p><div class=mermaid align=center>graph TD
 A(You don't want to wait<br>for a running command) --> B{Do you want to see output?}
diff --git a/posts/linux-swap-space-note/index.html b/posts/linux-swap-space-note/index.html
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#what-is-swap>What is Swap?</a></li><li><a href=#swap-partition-size>Swap partition size</a><ol><li><a href=#old-rule-of-thumb>Old rule of thumb</a></li><li><a href=#what-is-the-right-amount-of-swap-space>What is the right amount of swap space?</a></li></ol></li><li><a href=#common-misconceptions--gotchas>Common misconceptions & gotchas</a><ol><li><a href=#increasing-swap-size-would-increase-performance>Increasing swap size would increase performance</a></li><li><a href=#swappiness>Swappiness</a></li><li><a href=#using-swap-as-emergency-memory>Using swap as emergency memory</a></li></ol></li><li><a href=#references>References</a></li></ol></nav></div></details></div><div class=content><h2 id=what-is-swap>What is Swap?</h2><p>Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.</p><h2 id=swap-partition-size>Swap partition size</h2><h3 id=old-rule-of-thumb>Old rule of thumb</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>swap: 2 * the-amount-of-RAM
 </span></span></code></pre></div><p>So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time. Nowadays, RAM has become a <code>cheap</code> & <code>affordable</code> commondity, so the 2x rule is outdated.</p><h3 id=what-is-the-right-amount-of-swap-space>What is the right amount of swap space?</h3><p>Choosing the correct swap size is important. Too much swap space can hide memory leaks, also the storage space is allocated but idle. It can affect the system performance in general.</p><p>Follow the RedHat (CentOS 7x & RHEL 7) guide, the recommended size of a swap partition depending on the amount of RAM & whether you want sufficient memory for your system.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>swap &lt;= 10% * total-size-hard-drives &amp;&amp; swap &lt;= 128GB (if hibernation is allowed)
diff --git a/posts/linux-sysrq/index.html b/posts/linux-sysrq/index.html
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class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Linux Magic System Request Key Hacks</h1><time class="text-sm italic tabular-nums text-muted">2024/12/05&nbsp;</time>
+<nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2024/12/05&nbsp;</time><div class=section><a href=/tags/linux/ id=tag>Linux</a>
+<a href=/tags/tips/ id=tag>Tips</a>
+<a href=/tags/tech/ id=tag>Tech</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#giới-thiệu>Giới thiệu</a></li><li><a href=#cấu-hình-sysrq>Cấu hình SysRq</a></li><li><a href=#cách-sử-dụng>Cách sử dụng</a></li><li><a href=#một-số-command-keys-hữu-ích>Một số command keys hữu ích</a><ol><li><a href=#poweroff>Poweroff</a></li><li><a href=#reboot>Reboot</a></li><li><a href=#crash>Crash</a></li><li><a href=#đồng-bộ-filesystems>Đồng bộ filesystems</a></li><li><a href=#remount-filesystem-read-only>Remount filesystem read-only</a></li><li><a href=#kill-tất-cả-processes-trừ-tiến-trình-init>Kill tất cả processes trừ tiến trình init</a></li><li><a href=#gọi-oom-killer>Gọi OOM Killer</a></li><li><a href=#xem-danh-sách-blocked-state-processes>Xem danh sách blocked state processes</a></li></ol></li></ol></nav></div></details></div><div class=content><p>Source: <a href=https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html>https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html</a></p><h2 id=giới-thiệu>Giới thiệu</h2><p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &ldquo;treo&rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng <strong>Magic System Request Key (SysRq)</strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?</p><p>SysRq là một tính năng của Linux, cho phép người dùng gửi &ldquo;tín hiệu cầu cứu&rdquo; trực tiếp đến kernel của hệ điều hành.</p><figure class=figure><img src=https://framerusercontent.com/images/wjLSwytVCtdnGhq2xK8m6qSo4.png alt="sysrq - from trufflesecurity.com"><figcaption><p>sysrq - from trufflesecurity.com</p></figcaption></figure><h2 id=cấu-hình-sysrq>Cấu hình SysRq</h2><p>Để cấu hình SysRq, bạn có thể sử dụng command sau:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl><span class=nb>echo</span> <span class=s2>&#34;number&#34;</span> &gt;/proc/sys/kernel/sysrq
+</span></span></code></pre></div><p>Giá trị của &ldquo;number&rdquo; có thể nằm trong các trường hợp sau:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>  <span class=m>0</span>         - disable sysrq completely
+</span></span><span class=line><span class=cl>  <span class=m>1</span>         - <span class=nb>enable</span> all functions of sysrq
+</span></span><span class=line><span class=cl>  &gt;1        – bitmask to allow specific sysrq functions
+</span></span><span class=line><span class=cl>  <span class=nv>2</span> <span class=o>=</span>   0x2 - <span class=nb>enable</span> control of console logging level
+</span></span><span class=line><span class=cl>  <span class=nv>4</span> <span class=o>=</span>   0x4 - <span class=nb>enable</span> control of keyboard <span class=o>(</span>SAK, unraw<span class=o>)</span>
+</span></span><span class=line><span class=cl>  <span class=nv>8</span> <span class=o>=</span>   0x8 - <span class=nb>enable</span> debugging dumps of processes etc.
+</span></span><span class=line><span class=cl> <span class=nv>16</span> <span class=o>=</span>  0x10 - <span class=nb>enable</span> sync <span class=nb>command</span>
+</span></span><span class=line><span class=cl> <span class=nv>32</span> <span class=o>=</span>  0x20 - <span class=nb>enable</span> remount read-only
+</span></span><span class=line><span class=cl> <span class=nv>64</span> <span class=o>=</span>  0x40 - <span class=nb>enable</span> signalling of processes <span class=o>(</span>term, kill, oom-kill<span class=o>)</span>
+</span></span><span class=line><span class=cl><span class=nv>128</span> <span class=o>=</span>  0x80 - allow reboot/poweroff
+</span></span><span class=line><span class=cl><span class=nv>256</span> <span class=o>=</span> 0x100 - allow nicing of all RT tasks
+</span></span></code></pre></div><p>Kiểm tra giá trị hiện tại của sysrq:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# cat /proc/sys/kernel/sysrq
+</span></span><span class=line><span class=cl><span class=m>176</span>
+</span></span><span class=line><span class=cl><span class=c1># 176 không match với giá trị nào, well, thực ra 176 ở đây là 16+32+128 = 176</span>
+</span></span><span class=line><span class=cl><span class=c1>#</span>
+</span></span><span class=line><span class=cl><span class=c1># 16 =  0x10 - enable sync command</span>
+</span></span><span class=line><span class=cl><span class=c1># 32 =  0x20 - enable remount read-only</span>
+</span></span><span class=line><span class=cl><span class=c1># 128 =  0x80 - allow reboot/poweroff</span>
+</span></span><span class=line><span class=cl>
+</span></span><span class=line><span class=cl><span class=c1># Để test, bật hết lên cho đơn giản</span>
+</span></span><span class=line><span class=cl>root@vm1:/home/kien# root@vm1:/home/kien# <span class=nb>echo</span> <span class=m>1</span> &gt; /proc/sys/kernel/sysrq
+</span></span></code></pre></div><h2 id=cách-sử-dụng>Cách sử dụng</h2><p>Bạn có thể sử dụng tính năng bằng cách ấn tổ hợp phím (tùy thuộc hệ điều hành, đối với x86 là <code>ALT-SysRq-&lt;command key></code>, bàn phím của bạn thường sẽ có SysRq keyboard, để ý nhé) hoặc echo ký tự commands vào <code>/proc/sysrq-trigger</code>.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl><span class=nb>echo</span> &lt;<span class=nb>command</span> key&gt; &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><details><summary>Danh sách command key (ấn để show all)</summary><div><table class="docutils align-default"><thead><tr class=row-odd><th class=head><p>Command</p></th><th class=head><p>Function</p></th></tr></thead><tbody><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>b</span></code></p></td><td><p>Will immediately reboot the system without syncing or unmounting
+your disks.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>c</span></code></p></td><td><p>Will perform a system crash and a crashdump will be taken
+if configured.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>d</span></code></p></td><td><p>Shows all locks that are held.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>e</span></code></p></td><td><p>Send a SIGTERM to all processes, except for init.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>f</span></code></p></td><td><p>Will call the oom killer to kill a memory hog process, but do not
+panic if nothing can be killed.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>g</span></code></p></td><td><p>Used by kgdb (kernel debugger)</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>h</span></code></p></td><td><p>Will display help (actually any other key than those listed
+here will display help. but <code class="docutils literal notranslate"><span class=pre>h</span></code> is easy to remember :-)</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>i</span></code></p></td><td><p>Send a SIGKILL to all processes, except for init.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>j</span></code></p></td><td><p>Forcibly “Just thaw it” - filesystems frozen by the FIFREEZE ioctl.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>k</span></code></p></td><td><p>Secure Access Key (SAK) Kills all programs on the current virtual
+console. NOTE: See important comments below in SAK section.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>l</span></code></p></td><td><p>Shows a stack backtrace for all active CPUs.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>m</span></code></p></td><td><p>Will dump current memory info to your console.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>n</span></code></p></td><td><p>Used to make RT tasks nice-able</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>o</span></code></p></td><td><p>Will shut your system off (if configured and supported).</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>p</span></code></p></td><td><p>Will dump the current registers and flags to your console.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>q</span></code></p></td><td><p>Will dump per CPU lists of all armed hrtimers (but NOT regular
+timer_list timers) and detailed information about all
+clockevent devices.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>r</span></code></p></td><td><p>Turns off keyboard raw mode and sets it to XLATE.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>s</span></code></p></td><td><p>Will attempt to sync all mounted filesystems.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>t</span></code></p></td><td><p>Will dump a list of current tasks and their information to your
+console.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>u</span></code></p></td><td><p>Will attempt to remount all mounted filesystems read-only.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>v</span></code></p></td><td><p>Forcefully restores framebuffer console</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>v</span></code></p></td><td><p>Causes ETM buffer dump [ARM-specific]</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>w</span></code></p></td><td><p>Dumps tasks that are in uninterruptible (blocked) state.</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>x</span></code></p></td><td><p>Used by xmon interface on ppc/powerpc platforms.
+Show global PMU Registers on sparc64.
+Dump all TLB entries on MIPS.</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>y</span></code></p></td><td><p>Show global CPU Registers [SPARC-64 specific]</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>z</span></code></p></td><td><p>Dump the ftrace buffer</p></td></tr><tr class=row-even><td><p><code class="docutils literal notranslate"><span class=pre>0</span></code>-<code class="docutils literal notranslate"><span class=pre>9</span></code></p></td><td><p>Sets the console log level, controlling which kernel messages
+will be printed to your console. (<code class="docutils literal notranslate"><span class=pre>0</span></code>, for example would make
+it so that only emergency messages like PANICs or OOPSes would
+make it to your console.)</p></td></tr><tr class=row-odd><td><p><code class="docutils literal notranslate"><span class=pre>R</span></code></p></td><td><p>Replay the kernel log messages on consoles.</p></td></tr></tbody></table></div></details><h2 id=một-số-command-keys-hữu-ích>Một số command keys hữu ích</h2><blockquote><p>Để dễ hình dung, ví dụ dưới đây sẽ sử dụng phương án echo ký tự vào /proc/sysrq-trigger</p></blockquote><h3 id=poweroff>Poweroff</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> o &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><h3 id=reboot>Reboot</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> b &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><h3 id=crash>Crash</h3><p>Trigger crashdump thủ công nếu hệ thống bị treo. Đây cũng là một cách hay để giả lập kernel crashdump.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> c &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><h3 id=đồng-bộ-filesystems>Đồng bộ filesystems</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> s &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><h3 id=remount-filesystem-read-only>Remount filesystem read-only</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> u &gt; /proc/sysrq-trigger
+</span></span><span class=line><span class=cl>root@vm1:/home/kien# touch abc
+</span></span><span class=line><span class=cl>touch: cannot touch <span class=s1>&#39;abc&#39;</span>: Read-only file system
+</span></span></code></pre></div><h3 id=kill-tất-cả-processes-trừ-tiến-trình-init>Kill tất cả processes trừ tiến trình init</h3><p>Command key này đặc biệt hữu ích nếu bạn có tiến trình không thể kill, đặc biệt nếu tiến trình đó liên tục spawning ra các tiến trình khác.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl><span class=c1># Linux gửi SIGTERM đến tất cả các processes, trừ init</span>
+</span></span><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> e &gt; /proc/sysrq-trigger
+</span></span><span class=line><span class=cl>
+</span></span><span class=line><span class=cl><span class=c1># Linux gửi SIGKILL đến tất cả các processes, trừ init</span>
+</span></span><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> i &gt; /proc/sysrq-trigger
+</span></span></code></pre></div><h3 id=gọi-oom-killer>Gọi OOM Killer</h3><p>OOM Killer được gọi và hoàn thành nhiệm vụ của nó - kill tiến trình gây high memory usage.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> f &gt; /proc/sysrq-trigger
+</span></span><span class=line><span class=cl><span class=c1># Check kern.log để kiểm tra log</span>
+</span></span><span class=line><span class=cl>3585:Dec  <span class=m>5</span> 03:31:40 vm1 kernel: <span class=o>[</span>  195.899186<span class=o>]</span> sysrq: Manual OOM execution
+</span></span><span class=line><span class=cl>3586:Dec  <span class=m>5</span> 03:31:40 vm1 kernel: <span class=o>[</span>  195.901176<span class=o>]</span> kworker/0:1 invoked oom-killer: <span class=nv>gfp_mask</span><span class=o>=</span>0xcc0<span class=o>(</span>GFP_KERNEL<span class=o>)</span>, <span class=nv>order</span><span class=o>=</span>-1, <span class=nv>oom_score_adj</span><span class=o>=</span><span class=m>0</span>
+</span></span></code></pre></div><h3 id=xem-danh-sách-blocked-state-processes>Xem danh sách blocked state processes</h3><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl>root@vm1:/home/kien# <span class=nb>echo</span> w &gt; /proc/sysrq-trigger
+</span></span><span class=line><span class=cl><span class=c1># Check kern.log để kiểm tra</span>
+</span></span><span class=line><span class=cl>Dec  <span class=m>5</span> 03:33:02 vm1 kernel: <span class=o>[</span>  277.781446<span class=o>]</span> sysrq: Show Blocked State
+</span></span></code></pre></div></div><div class=mt-16><script src=https://giscus.app/client.js data-repo=ntk148v/ntk148v.github.io data-repo-id=R_kgDOIWtaXA data-category="Show and tell" data-category-id=DIC_kwDOIWtaXM4CSU-P data-mapping=pathname data-strict=0 data-reactions-enabled=1 data-emit-metadata=0 data-input-position=bottom data-theme=preferred_color_scheme data-lang=en crossorigin=anonymous async></script></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/posts/linux-tools-that-you-never-knew-you-needed/index.html b/posts/linux-tools-that-you-never-knew-you-needed/index.html
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@@ -1,7 +1,7 @@
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text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Linux tools that you never knew you needed</h1><time class="text-sm italic tabular-nums text-muted">2021/04/07&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tips/ id=tag>Tips</a>
 <a href=/tags/tech/ id=tag>Tech</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#bat---cat-alternative>bat - (cat alternative)</a></li><li><a href=#fd---find-alternative>fd - (find alternative)</a></li><li><a href=#httpie---wgetcurl-alternative>httpie - (wget/curl alternative)</a></li><li><a href=#ripgrep---grep-alternative>ripgrep - (grep alternative)</a></li><li><a href=#delta>delta</a></li><li><a href=#z>z</a></li><li><a href=#fzf>fzf</a></li><li><a href=#thefuck>thefuck</a></li><li><a href=#exa---ls-alternative>exa - (ls alternative)</a></li></ol></nav></div></details></div><div class=content><h2 id=bat---cat-alternative>bat - (cat alternative)</h2><ul><li><a href=https://github.com/sharkdp/bat>bat</a>: A cat(1) clone with syntax highlighting and Git integration.</li><li>Example:</li></ul><figure class=figure><img src=/photos/linux-tools-that-you-never-knew-you-needed/bat.png></figure><h2 id=fd---find-alternative>fd - (find alternative)</h2><ul><li><a href=https://github.com/sharkdp/fd>fd</a>: a simple, fast and user-friendly alternative to <code>find</code>.</li><li>Examples:</li></ul><figure class=figure><img src=https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg></figure><h2 id=httpie---wgetcurl-alternative>httpie - (wget/curl alternative)</h2><ul><li><a href=https://httpie.io>httpie</a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.</li><li>Examples:</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl><span class=c1># Hello world</span>
diff --git a/posts/moving-from-utterances-to-giscus/index.html b/posts/moving-from-utterances-to-giscus/index.html
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--- a/posts/moving-from-utterances-to-giscus/index.html
+++ b/posts/moving-from-utterances-to-giscus/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/moving-from-utterances-to-giscus/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Moving from Utterances to Giscus</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/moving-from-utterances-to-giscus/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Moving from Utterances to Giscus</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Moving from Utterances to Giscus</h1><time class="text-sm italic tabular-nums text-muted">2022/08/30&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#why-migrate>Why migrate?</a></li><li><a href=#prepare-your-site>Prepare your site</a></li></ol></nav></div></details></div><div class=content><p>I&rsquo;ve used <a href=./lets-comment.md>Utterances</a> for a while. Using Github&rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - <a href=https://github.com/giscus/giscus>Giscus</a>. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.</p><p>So..</p><h2 id=why-migrate>Why migrate?</h2><ul><li><strong>Post reactions</strong>: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself. giscus provides this feature.</li><li><strong>Conversation view</strong>: utterances will simply render comments as a list in the order they have been created. Giscus groups replies to a comment instead. I mean comment is about discussion, right?</li></ul><h2 id=prepare-your-site>Prepare your site</h2><ul><li>Migrate from utterances: <a href=https://docs.github.com/en/discussions/managing-discussions-for-your-community/moderating-discussions#converting-an-issue-to-a-discussion>convert the existing issues into discussions</a>.</li><li>Follow <a href=https://giscus.app/>Giscus</a>, it&rsquo;s quite simple.</li></ul><p><code>Leave a comment 👇</code></p></div><div class=mt-16><script src=https://giscus.app/client.js data-repo=ntk148v/ntk148v.github.io data-repo-id=R_kgDOIWtaXA data-category="Show and tell" data-category-id=DIC_kwDOIWtaXM4CSU-P data-mapping=pathname data-strict=0 data-reactions-enabled=1 data-emit-metadata=0 data-input-position=bottom data-theme=preferred_color_scheme data-lang=en crossorigin=anonymous async></script></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/posts/openstack-autoscaling-new-approach/index.html b/posts/openstack-autoscaling-new-approach/index.html
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@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
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class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Openstack Autoscaling New Approach</h1><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time>
+</title><meta name=author content="map[email:kiennt2609@gmail.com name:Kien Nguyen-Tuan]"><meta name=description content><meta name=viewport content="width=device-width,initial-scale=1"><link rel=icon href=/favicon_io/favicon.ico type=image/x-icon><link rel=icon href=/favicon_io/favicon-16x16.png size=16x16 type=image/png><link rel=icon href=/favicon_io/favicon-32x32.png size=32x32 type=image/png><link rel=preload type=text/css href=/css/rose-pine.min.css integrity as=style onload='this.onload=null,this.rel="stylesheet"'><noscript><link rel=stylesheet type=text/css href=/css/rose-pine.min.css integrity></noscript><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Overpass+Mono:wght@400;500;700&family=Overpass:wght@400;500;700&display=swap" rel=stylesheet><link rel=preload type=text/css 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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/openstack-autoscaling-new-approach/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Openstack Autoscaling New Approach</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide 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class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Openstack Autoscaling New Approach</h1><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/openstack/ id=tag>Openstack</a>
 <a href=/tags/prometheus/ id=tag>Prometheus</a>
 <a href=/tags/faythe/ id=tag>Faythe</a>
diff --git a/posts/operate-etcd-cluster/index.html b/posts/operate-etcd-cluster/index.html
index 08aa791..bfe7045 100644
--- a/posts/operate-etcd-cluster/index.html
+++ b/posts/operate-etcd-cluster/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Operate Etcd cluster</h1><time class="text-sm italic tabular-nums text-muted">2020/04/28&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/etcd/ id=tag>Etcd</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#context>Context</a></li><li><a href=#requirements>Requirements</a><ol><li><a href=#number-of-nodes>Number of nodes</a></li><li><a href=#cpus>CPUs</a></li><li><a href=#memory>Memory</a></li><li><a href=#disk>Disk</a></li><li><a href=#network>Network</a></li></ol></li><li><a href=#tuning>Tuning</a><ol><li><a href=#time-parameters>Time parameters</a></li><li><a href=#disk-1>Disk</a></li><li><a href=#snapshot>Snapshot</a></li></ol></li><li><a href=#maintenance>Maintenance</a><ol><li><a href=#history-compaction>History compaction</a></li><li><a href=#defragmentation>Defragmentation</a></li></ol></li><li><a href=#references>References</a></li></ol></nav></div></details></div><div class=content><blockquote><p><strong>NOTE</strong>: This is my perspective aggregation. You can easily find these such of knowledges in <a href=#5-references>the references</a>.</p></blockquote><h2 id=context>Context</h2><p>Etcd Version <code>v3.4.0</code>.</p><h2 id=requirements>Requirements</h2><h3 id=number-of-nodes>Number of nodes</h3><ul><li>>= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with <strong>n-members</strong>, quorum is <strong>(n/2)+1</strong>.</li></ul><h3 id=cpus>CPUs</h3><ul><li>Etcd doesn&rsquo;t require a lot of CPU capacity.</li><li>Typical clusters need <strong>2-4 cores</strong> to run smoothly.</li></ul><h3 id=memory>Memory</h3><ul><li>Etcd performance depends on having enough memory (cache key-value data, tracking watchers&mldr;).</li><li>Typical <strong>8GB</strong> is enough.</li></ul><h3 id=disk>Disk</h3><ul><li>An etcd cluster is very sensitive to disk latencies. Since etcd must persist proposals to its log, disk activity from other processes may cause long <code>fsync</code> latencies. The upshot is etcd may miss heartbeats, causing request timeouts and temporary leader loss. An etcd server can sometimes stably run alongside these processes when given a high disk priority.</li><li>Check whether a disk is fast enough for etcd using <a href=https://github.com/axboe/fio>fio</a>. If the 99th percentile of fdatasync is <strong>&lt;10ms</strong>, your storage is ok.</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>$ fio --rw<span class=o>=</span>write --ioengine<span class=o>=</span>sync --fdatasync<span class=o>=</span><span class=m>1</span> --directory<span class=o>=</span>test-data <span class=se>\
 </span></span></span><span class=line><span class=cl><span class=se></span>    --size<span class=o>=</span>22m --bs<span class=o>=</span><span class=m>2300</span> --name<span class=o>=</span>mytest
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/problem-solving-techniques/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Problem Solving Techniques</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/problem-solving-techniques/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Problem Solving Techniques</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Problem Solving Techniques</h1><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/algorithm/ id=tag>Algorithm</a>
 <a href=/tags/techniques/ id=tag>Techniques</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#the-feynman-algorithm>The Feynman Algorithm</a></li><li><a href=#polyas-principles>Polya&rsquo;s Principles</a></li></ol></nav></div></details></div><div class=content><div align=center><iframe src=https://giphy.com/embed/777Aby0ZetYE8 width=480 height=259 frameborder=0 class=giphy-embed allowfullscreen></iframe><p><a href=https://giphy.com/gifs/cute-think-pooh-777Aby0ZetYE8>via GIPHY</a></p><p>Haven't thought of anything, have you? No, neither have I. Think, think, think</p></div><h2 id=the-feynman-algorithm>The Feynman Algorithm</h2><p>The <a href=http://wiki.c2.com/?FeynmanAlgorithm>Feynman algorithm</a> was facetiously suggested by <a href=http://en.wikipedia.org/wiki/Murray_Gell-Mann>Murray Gell-Mann</a>, a colleague of <a href=https://en.wikipedia.org/wiki/Richard_Feynman>Richard Feynman</a>, in a New York Times interview.</p><p>It is the combination of three steps:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>1. Write down the problem.
 </span></span><span class=line><span class=cl>2. Think real hard.
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/23&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a></div><div id=toc></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">The following content is rendered from <a href=https://github.com/ntk148v/til/blob/master/recurse-center/README.md>my #til github</a>.</blockquote><h1 id=recurse-center>Recurse Center</h1><p>Source: <a href=https://www.recurse.com/>https://www.recurse.com/</a></p><div class=highlight><pre tabindex=0 class=chroma><code class=language-text data-lang=text><span class=line><span class=cl>The retreat where curious programmers recharge and grow
 </span></span></code></pre></div><p>I&rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from <a href=https://jvns.ca/blog/2017/09/17/how-i-spent-my-time-at-the-recurse-center/>Julia Evan&rsquo;s blog</a>.</p><p>Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other. You will spnd six or 12 weeks programming at the edge of your abilities alongside motivated peers - at no cost to you.</p><p>Recurse Center is not a traditional school but a <a href=https://www.recurse.com/self-directives>self-directives</a> learning community:</p><ul><li><strong>Work at the edge of your abilities</strong> means being ambitious about what you can achieve and also honest about your capacity, choosing work that challenges you but isn’t so far beyond your current abilities that it’s discouraging.</li></ul><blockquote class=twitter-tweet><p lang=en dir=ltr>I often advise people to take on projects you're only 70% qualified for, but then learn like crazy to bridge that 30%.</p>&mdash; Andrew Ng (@AndrewYNg) <a href="https://twitter.com/AndrewYNg/status/841076327931236352?ref_src=twsrc%5Etfw">March 12, 2017</a></blockquote><script async src=https://platform.twitter.com/widgets.js></script><ul><li><strong>Build your volitional muscles</strong> means growing your ability to make decisions about your work and learning based your own curiosity and joy, rather than external pressures and fears.</li><li><strong>Learn generously</strong>.</li></ul><p>Recurse Center does not have any prerequisites and welcomes programmers of all skill levels. Their learning program doesn&rsquo;t involve teachers, lectures, or predefined curriculum. Instead, members actively build and manage their learning journey based on their interests and personal goals.</p><p>In addition to individual learning, Recurse Center organizes extended activities and community events such as discussions, internships, and group meetings. These initiatives help foster social connections and expand the network of programmers within the community.</p><p>Recurse Center has become a sought-after destination for individuals looking to enhance their programming skills, cultivate creativity, and tackle new challenges in the field of technology.</p><p>One more thing, Recurse Center has a small set of lightweight <a href=https://www.recurse.com/social-rules>social rules</a> that make more <em>explicit</em> certain social norms that are normally <em>implicit</em>. And I found these rules are not only applicable at Recurse Center but should also be applied to life and corporate culture. People may unintentionally be a jerk somewhat, read through the following and ask yourself.</p><ul><li><strong>No feigning surprise</strong>: You shouldn&rsquo;t act surprised when people say they don&rsquo;t know something. This applies to both technical things (&ldquo;What?! I can&rsquo;t believe you don&rsquo;t know what the stack is!&rdquo;) and non-technical things (&ldquo;You don&rsquo;t know who RMS is?!&rdquo;).</li><li><strong>No subtle -isms</strong>: Our last social rule bans subtle racism, sexism, homophobia, transphobia, and other kinds of bias. Subtle -isms are small things that make others feel unwelcome, things that we all sometimes do by mistake.</li><li><strong>No well-actuallys</strong>: A well-actually happens when someone says something that&rsquo;s almost - but not entirely - correct, and you say, &ldquo;well, actually…&rdquo; and then give a minor correction. This can be very disruptive when the correction has no bearing on the crux of the conversation.</li><li><strong>No back-seat driving</strong>: If you overhear, or read on Zulip, people working through a problem, you shouldn&rsquo;t give advice unless you’re actively participating in the conversation.</li></ul><p>To learn more about it I recommend the <a href=https://www.recurse.com/manual>user’s manual</a>.</p><p>Final words, that I really want to create one Recurse Center for Vietnamese, we really need this.</p></div><div class=mt-16><script src=https://giscus.app/client.js data-repo=ntk148v/ntk148v.github.io data-repo-id=R_kgDOIWtaXA data-category="Show and tell" data-category-id=DIC_kwDOIWtaXM4CSU-P data-mapping=pathname data-strict=0 data-reactions-enabled=1 data-emit-metadata=0 data-input-position=bottom data-theme=preferred_color_scheme data-lang=en crossorigin=anonymous async></script></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/posts/rename-files-in-linux/index.html b/posts/rename-files-in-linux/index.html
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tech/ id=tag>Tech</a></div><div id=toc></div><div class=content><ul><li>Rename a single file with <code>mv</code>. Just a basic thing.</li><li>Rename multiple files with <code>mv</code>.</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl><span class=c1># Rename files with suffix .yaml to yml</span>
 </span></span><span class=line><span class=cl><span class=k>for</span> f in *.yaml<span class=p>;</span> <span class=k>do</span> mv -- <span class=s2>&#34;</span><span class=nv>$f</span><span class=s2>&#34;</span> <span class=s2>&#34;</span><span class=si>${</span><span class=nv>f</span><span class=p>%.yaml</span><span class=si>}</span><span class=s2>.yml&#34;</span> <span class=k>done</span>
diff --git a/posts/rip-kobe-bryant/index.html b/posts/rip-kobe-bryant/index.html
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@@ -1,7 +1,7 @@
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/ramblings/ id=tag>Ramblings</a>
 <a href=/tags/basketball/ id=tag>Basketball</a></div><div id=toc></div><div class=content><p><img src=./theundefeated-kobe-bryant.pg alt></p><p>Source: <a href=https://theundefeated.com/features/kobe-vs-kobe-bryant-lakers-numbers-8-and-24-jersey-retirement/>The Undefeated</a></p><p>I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.</p><p>Rest In Peace Mamba 🏀</p><p><img src=./kobe.jpg alt></p></div><div class=mt-16><script src=https://giscus.app/client.js data-repo=ntk148v/ntk148v.github.io data-repo-id=R_kgDOIWtaXA data-category="Show and tell" data-category-id=DIC_kwDOIWtaXM4CSU-P data-mapping=pathname data-strict=0 data-reactions-enabled=1 data-emit-metadata=0 data-input-position=bottom data-theme=preferred_color_scheme data-lang=en crossorigin=anonymous async></script></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
 2024
diff --git a/posts/set-animated-gif-as-wallpaper/index.html b/posts/set-animated-gif-as-wallpaper/index.html
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--- a/posts/set-animated-gif-as-wallpaper/index.html
+++ b/posts/set-animated-gif-as-wallpaper/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
       A minimal Hugo theme with Tailwind CSS"><title>kiennt26's home
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href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Set Animated Gif as Wallpaper</h1><time class="text-sm italic tabular-nums text-muted">2021/01/14&nbsp;</time>
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/set-animated-gif-as-wallpaper/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Set Animated Gif as Wallpaper</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide 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href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Set Animated Gif as Wallpaper</h1><time class="text-sm italic tabular-nums text-muted">2021/01/14&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/02/20&nbsp;</time><div class=section><a href=/tags/linux/ id=tag>Linux</a>
 <a href=/tags/tips/ id=tag>Tips</a>
 <a href=/tags/tech/ id=tag>Tech</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#dependencies>Dependencies</a></li><li><a href=#the-helper-script>The helper script</a></li></ol></nav></div></details></div><div class=content><blockquote><p><strong>NOTE</strong>: Environment Ubuntu 20.04</p></blockquote><h2 id=dependencies>Dependencies</h2><ul><li><a href=https://github.com/ujjwal96/xwinwrap>Xwinwrap</a>:</li></ul><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
diff --git a/posts/testing-ansible-with-molecule/index.html b/posts/testing-ansible-with-molecule/index.html
index 45d07a2..67a494e 100644
--- a/posts/testing-ansible-with-molecule/index.html
+++ b/posts/testing-ansible-with-molecule/index.html
@@ -1,7 +1,7 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Posts</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/posts/testing-ansible-with-molecule/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Testing Ansible With Molecule</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide 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href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Testing Ansible With Molecule</h1><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time>
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href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Testing Ansible With Molecule</h1><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/ansible/ id=tag>Ansible</a></div><div id=toc></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">The following content is rendered from <a href=https://github.com/ntk148v/til/blob/master/ansible/molecule.md>my #til github</a>.</blockquote><h1 id=testing-ansible-with-molecule>Testing Ansible with Molecule</h1><p>Source:</p><ul><li><a href=https://molecule.readthedocs.io/en/latest/getting-started/>https://molecule.readthedocs.io/en/latest/getting-started/</a></li><li><a href=https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule>https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule</a></li></ul><p>Table of contents:</p><ul><li><a href=#testing-ansible-with-molecule>Testing Ansible with Molecule</a><ul><li><a href=#0-problem>0. Problem</a></li><li><a href=#1-introduction>1. Introduction</a></li><li><a href=#2-play-with-molecule>2. Play with Molecule</a><ul><li><a href=#21-getting-started>2.1. Getting started</a></li><li><a href=#22-custom-docker-image>2.2. Custom Docker image</a></li><li><a href=#23-test-an-existing-role>2.3. Test an existing role</a></li><li><a href=#24-test-cluster>2.4. Test Cluster</a></li></ul></li></ul></li></ul><h2 id=0-problem>0. Problem</h2><p>You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:</p><ul><li>Test in production 😇 Just do it, just run it! If something wrongs, fix and run it again.</li></ul><div style=width:480px><iframe allow=fullscreen frameborder=0 height=270 src=https://giphy.com/embed/AbOZR8G922HtmsfNlv/video width=480></iframe></div><ul><li>Create a testing environment, check playbook in it.</li></ul><p>Unless you&rsquo;re a brave hero or a careless person, you should go to option 2 - testing environment. Let&rsquo;s talk about it, the testing environment should be clean, so the procedure is:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>- Spin up a VM.
 </span></span><span class=line><span class=cl>- Run your playbook.
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 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/11/03&nbsp;</time><div class=section><a href=/tags/thoughts/ id=tag>Thoughts</a>
 <a href=/tags/non-tech/ id=tag>Non-Tech</a>
 <a href=/tags/ramblings/ id=tag>Ramblings</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#willingness-to-look-stupid>Willingness to look stupid</a></li><li><a href=#leadership>Leadership</a></li><li><a href=#company-culture>Company culture</a></li><li><a href=#how-to-write-a-resume>How to write a resume</a></li><li><a href=#life-is-too-short-to-work-like-crazy-for-most-of-its-part>Life is too short to work like crazy for most of its part</a></li><li><a href=#success-is-the-result-of-perfection-hard-work-learning-from-failure-loyalty-and-persistence>Success is the result of perfection, hard work, learning from failure, loyalty, and persistence</a></li><li><a href=#before-you-try-to-do-something-make-sure-you-can-do-nothing>Before you try to do something, make sure you can do nothing</a></li><li><a href=#good-code-is-like-a-love-letter-to-the-next-developer-who-will-maintain-its>Good code is like a love letter to the next developer who will maintain its</a></li><li><a href=#7-years-cycle>7 years cycle</a></li><li><a href=#looking-for-peaceful>Looking for peaceful</a></li><li><a href=#do-something-so-we-can-change-it>Do something, so we can change it</a></li><li><a href=#sane-work-weeks-make-the-news>Sane work weeks make the News</a></li><li><a href=#titles-are-toxic>Titles are toxic</a></li><li><a href=#proof-you-can-do-hard-things>Proof you can do hard things</a></li><li><a href=#mindset>Mindset</a></li><li><a href=#jack-of-all-trades-master-of-none>Jack of all trades, master of none</a></li></ol></nav></div></details></div><div class=content><blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">A collection of interesting thoughts and opinions that I come across</blockquote><h2 id=willingness-to-look-stupid>Willingness to look stupid</h2><div align=center><blockquote class=twitter-tweet><p lang=en dir=ltr>Willingness to look stupid<a href=https://t.co/0WrVAzLQ6g>https://t.co/0WrVAzLQ6g</a> <a href=https://t.co/6NjysMwbch>pic.twitter.com/6NjysMwbch</a></p>&mdash; Dan Luu (@danluu) <a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021</a></blockquote><script async src=https://platform.twitter.com/widgets.js></script></div><p>I recently read <a href=https://danluu.com/look-stupid/>this article</a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.</p><p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing 🤦‍♂️. I&rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &mldr;). And I know that I&rsquo;m not the only one, look smart but being stupid.</p><p>There&rsquo;s <a href=https://www.linkedin.com/posts/soreniverson_willingness-to-look-stupid-activity-6859517714659123200-cytw/>a huge difference between stupid and looking stupid. Sometimes looking stupid means you&rsquo;re willing to ask necessary questions to wrap your head around a problem or concept</a>.</p><p><em>Be willing to look stupid.</em></p><p>Template to look stupid, get it from <a href="https://news.ycombinator.com/item?id=28942189">Hacker News&rsquo;s thread</a>:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-fallback data-lang=fallback><span class=line><span class=cl>&#34;I&#39;m going to ask stupid questions now, &lt;insert my question here&gt;&#34;
diff --git a/posts/writing-a-simple-shell-in-c-sharp/index.html b/posts/writing-a-simple-shell-in-c-sharp/index.html
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 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
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class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><h1>Writing a Simple Shell in C Sharp</h1><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time>
 <nobr class="text-sm text-muted">&#8674&nbsp;</nobr><time class="text-sm italic tabular-nums text-muted">2023/08/30&nbsp;</time><div class=section><a href=/tags/tech/ id=tag>Tech</a>
 <a href=/tags/csharp/ id=tag>Csharp</a>
 <a href=/tags/shell/ id=tag>Shell</a></div><div id=toc><details open><summary>Table of contents</summary><div id=toc-list><nav id=TableOfContents><ol><li><a href=#what-is-a-shell>What is a shell?</a></li><li><a href=#basic-lifetime-of-a-shell>Basic lifetime of a shell</a></li><li><a href=#execute-command>Execute command</a></li><li><a href=#shell-built-in-commands>Shell Built-in Commands</a><ol><li><a href=#cd><code>cd</code></a></li><li><a href=#exit><code>exit</code></a></li><li><a href=#which><code>which</code></a></li><li><a href=#help><code>help</code></a></li></ol></li><li><a href=#improvement>Improvement</a><ol><li><a href=#handle-exception>Handle exception</a></li><li><a href=#handle-command-not-found>Handle command not found</a></li></ol></li><li><a href=#wrap-up>Wrap up</a></li></ol></nav></div></details></div><div class=content><p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.</p><p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:</p><ul><li>Commands must be on a single line.</li><li>Arguments must be separated by whitespace.</li><li>No quoting arguments or escaping whitespace.</li><li>No piping or redirection.</li></ul><blockquote><p>Before we start, make sure you have .NET Core environment and knownledge.</p></blockquote><h2 id=what-is-a-shell>What is a shell?</h2><p>In computing, a <a href=https://en.wikipedia.org/wiki/Shell_(computing)>shell</a> is a computer program that exposes an operating system&rsquo;s services to a human user or other programs. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer&rsquo;s role and particular operation. It is named a shell because it is the outermost layer around the operating system.</p><p>Some examples:</p><ul><li>Bash</li><li>Zsh</li><li>Gnome Shell</li></ul><p>In this article, I describe <em>a simple text-based, non-graphical shell</em> with the basic functionality: give an input command and receive the output of this command.</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-shell data-lang=shell><span class=line><span class=cl><span class=c1># Input</span>
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diff --git a/tags/algorithm/index.xml b/tags/algorithm/index.xml
index 85ef311..ceb901e 100644
--- a/tags/algorithm/index.xml
+++ b/tags/algorithm/index.xml
@@ -1,5 +1,16 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Algorithm on kiennt26's home</title><link>https://ntk148v.github.io/tags/algorithm/</link><description>Recent content in Algorithm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/algorithm/index.xml" rel="self" type="application/rss+xml"/><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>via GIPHY
-Haven't thought of anything, have you? No, neither have I. Think, think, think
-The Feynman Algorithm The Feynman algorithm was facetiously suggested by Murray Gell-Mann, a colleague of Richard Feynman, in a New York Times interview.
-It is the combination of three steps:
-1. Write down the problem. 2. Think real hard. 3. Write down the solution. Polya&amp;rsquo;s Principles If you can&amp;#39;t solve a problem, then there is an easier problem you can solve: find it.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Algorithm on kiennt26's home</title><link>https://ntk148v.github.io/tags/algorithm/</link><description>Recent content in Algorithm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/algorithm/index.xml" rel="self" type="application/rss+xml"/><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>&lt;div align="center">
+ &lt;iframe src="https://giphy.com/embed/777Aby0ZetYE8" width="480" height="259" frameBorder="0" class="giphy-embed" allowFullScreen>&lt;/iframe>&lt;p>&lt;a href="https://giphy.com/gifs/cute-think-pooh-777Aby0ZetYE8">via GIPHY&lt;/a>&lt;/p>
+ &lt;p>Haven't thought of anything, have you? No, neither have I. Think, think, think&lt;/p>
+&lt;/div>
+&lt;h2 id="the-feynman-algorithm">The Feynman Algorithm&lt;/h2>
+&lt;p>The &lt;a href="http://wiki.c2.com/?FeynmanAlgorithm">Feynman algorithm&lt;/a> was facetiously suggested by &lt;a href="http://en.wikipedia.org/wiki/Murray_Gell-Mann">Murray Gell-Mann&lt;/a>, a colleague of &lt;a href="https://en.wikipedia.org/wiki/Richard_Feynman">Richard Feynman&lt;/a>, in a New York Times interview.&lt;/p>
+&lt;p>It is the combination of three steps:&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Write down the problem.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Think real hard.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Write down the solution.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="polyas-principles">Polya&amp;rsquo;s Principles&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">If you can&amp;#39;t solve a problem, then there is an easier problem you can
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">solve: find it.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">-- George Poyla --
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>George Polya described in his 1957 book &lt;a href="https://en.wikipedia.org/wiki/How_to_Solve_It">How to Solve It&lt;/a> (HowToSolveIt) a set of heuristics for solving problems. A basic outline of his approach is pretty similar to Feynman&amp;rsquo;s Algorithm:&lt;/p></description></item></channel></rss>
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diff --git a/tags/ansible/index.html b/tags/ansible/index.html
index 313c5a5..efccb4b 100644
--- a/tags/ansible/index.html
+++ b/tags/ansible/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/ansible/index.xml b/tags/ansible/index.xml
index 0504d7a..549eea8 100644
--- a/tags/ansible/index.xml
+++ b/tags/ansible/index.xml
@@ -1,5 +1,46 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ansible on kiennt26's home</title><link>https://ntk148v.github.io/tags/ansible/</link><description>Recent content in Ansible on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ansible/index.xml" rel="self" type="application/rss+xml"/><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>The following content is rendered from my #til github. Testing Ansible with Molecule Source:
-https://molecule.readthedocs.io/en/latest/getting-started/ https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule Table of contents:
-Testing Ansible with Molecule 0. Problem 1. Introduction 2. Play with Molecule 2.1. Getting started 2.2. Custom Docker image 2.3. Test an existing role 2.4. Test Cluster 0. Problem You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:</description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>Ansitheus: Ansible + Prometheus Prometheus overview NOTE: Checkout the Prometheus official documentation.
-Prometheus is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.
-Features a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs PromQL, a flexible query language to leverage this dimensionality no reliance on distributed storage; single server nodes are autonomous time series collection happens via a pull model over HTTP pushing time series is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing &amp;amp; dashboarding support Architecture &amp;amp; components Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ansible on kiennt26's home</title><link>https://ntk148v.github.io/tags/ansible/</link><description>Recent content in Ansible on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ansible/index.xml" rel="self" type="application/rss+xml"/><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/ansible/molecule.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://molecule.readthedocs.io/en/latest/getting-started/">https://molecule.readthedocs.io/en/latest/getting-started/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule">https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>Table of contents:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#0-problem">0. Problem&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-play-with-molecule">2. Play with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#21-getting-started">2.1. Getting started&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#22-custom-docker-image">2.2. Custom Docker image&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#23-test-an-existing-role">2.3. Test an existing role&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#24-test-cluster">2.4. Test Cluster&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="0-problem">0. Problem&lt;/h2>
+&lt;p>You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:&lt;/p></description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">Ansitheus: Ansible + Prometheus
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="prometheus-overview">Prometheus overview&lt;/h2>
+&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Checkout the &lt;a href="https://prometheus.io/docs/introduction/overview/">Prometheus official documentation&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;p>&lt;a href="https://github.com/prometheus">Prometheus&lt;/a> is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.&lt;/p>
+&lt;h3 id="features">Features&lt;/h3>
+&lt;ul>
+&lt;li>a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs&lt;/li>
+&lt;li>PromQL, a flexible query language to leverage this dimensionality&lt;/li>
+&lt;li>no reliance on distributed storage; single server nodes are autonomous&lt;/li>
+&lt;li>time series collection happens via a pull model over HTTP&lt;/li>
+&lt;li>pushing time series is supported via an intermediary gateway&lt;/li>
+&lt;li>targets are discovered via service discovery or static configuration&lt;/li>
+&lt;li>multiple modes of graphing &amp;amp; dashboarding support&lt;/li>
+&lt;/ul>
+&lt;h3 id="architecture--components">Architecture &amp;amp; components&lt;/h3>
+&lt;p>Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. It stores all scraped samples locally &amp;amp; runs rules over this data to either aggregate &amp;amp; record new time series from existing data or generate alerts. Grafana or other API consumers can be used to visualize the collected data.&lt;/p></description></item></channel></rss>
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diff --git a/tags/basketball/index.html b/tags/basketball/index.html
index 3faa745..82be6fe 100644
--- a/tags/basketball/index.html
+++ b/tags/basketball/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/basketball/index.xml b/tags/basketball/index.xml
index 2cd9641..e3c7f04 100644
--- a/tags/basketball/index.xml
+++ b/tags/basketball/index.xml
@@ -1,3 +1,5 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Basketball on kiennt26's home</title><link>https://ntk148v.github.io/tags/basketball/</link><description>Recent content in Basketball on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/basketball/index.xml" rel="self" type="application/rss+xml"/><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>Source: The Undefeated
-I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.
-Rest In Peace Mamba :basketball:</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Basketball on kiennt26's home</title><link>https://ntk148v.github.io/tags/basketball/</link><description>Recent content in Basketball on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/basketball/index.xml" rel="self" type="application/rss+xml"/><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>&lt;p>&lt;img src="./theundefeated-kobe-bryant.pg" alt="">&lt;/p>
+&lt;p>Source: &lt;a href="https://theundefeated.com/features/kobe-vs-kobe-bryant-lakers-numbers-8-and-24-jersey-retirement/">The Undefeated&lt;/a>&lt;/p>
+&lt;p>I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.&lt;/p>
+&lt;p>Rest In Peace Mamba :basketball:&lt;/p>
+&lt;p>&lt;img src="./kobe.jpg" alt="">&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/bgp/index.html b/tags/bgp/index.html
index 6e3a95e..6391bba 100644
--- a/tags/bgp/index.html
+++ b/tags/bgp/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/bgp/index.xml b/tags/bgp/index.xml
index ef75fbc..607432f 100644
--- a/tags/bgp/index.xml
+++ b/tags/bgp/index.xml
@@ -1,3 +1,26 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bgp on kiennt26's home</title><link>https://ntk148v.github.io/tags/bgp/</link><description>Recent content in Bgp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/bgp/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bgp on kiennt26's home</title><link>https://ntk148v.github.io/tags/bgp/</link><description>Recent content in Bgp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/bgp/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item></channel></rss>
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diff --git a/tags/compton/index.html b/tags/compton/index.html
index 8d3d528..657695a 100644
--- a/tags/compton/index.html
+++ b/tags/compton/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/compton/index.xml b/tags/compton/index.xml
index 20909bb..25c1d6a 100644
--- a/tags/compton/index.xml
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diff --git a/tags/csharp/index.html b/tags/csharp/index.html
index 3cac85c..86b4ae3 100644
--- a/tags/csharp/index.html
+++ b/tags/csharp/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/csharp/index.xml b/tags/csharp/index.xml
index b5aa019..f43e8cc 100644
--- a/tags/csharp/index.xml
+++ b/tags/csharp/index.xml
@@ -1,3 +1,10 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Csharp on kiennt26's home</title><link>https://ntk148v.github.io/tags/csharp/</link><description>Recent content in Csharp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/csharp/index.xml" rel="self" type="application/rss+xml"/><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.
-Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:
-Commands must be on a single line. Arguments must be separated by whitespace. No quoting arguments or escaping whitespace. No piping or redirection. Before we start, make sure you have .</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Csharp on kiennt26's home</title><link>https://ntk148v.github.io/tags/csharp/</link><description>Recent content in Csharp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/csharp/index.xml" rel="self" type="application/rss+xml"/><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>&lt;p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.&lt;/p>
+&lt;p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:&lt;/p>
+&lt;ul>
+&lt;li>Commands must be on a single line.&lt;/li>
+&lt;li>Arguments must be separated by whitespace.&lt;/li>
+&lt;li>No quoting arguments or escaping whitespace.&lt;/li>
+&lt;li>No piping or redirection.&lt;/li>
+&lt;/ul>
+&lt;blockquote>
+&lt;p>Before we start, make sure you have .NET Core environment and knownledge.&lt;/p></description></item></channel></rss>
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diff --git a/tags/docker/index.html b/tags/docker/index.html
index 79c6cc6..e17d565 100644
--- a/tags/docker/index.html
+++ b/tags/docker/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/docker/index.xml b/tags/docker/index.xml
index 33ebf1a..3d5bbe8 100644
--- a/tags/docker/index.xml
+++ b/tags/docker/index.xml
@@ -1,6 +1,32 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Docker on kiennt26's home</title><link>https://ntk148v.github.io/tags/docker/</link><description>Recent content in Docker on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Tue, 12 Dec 2023 14:49:04 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/docker/index.xml" rel="self" type="application/rss+xml"/><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>A clumsy Docker networking notes Nguồn:
-https://github.com/ntk148v/til/tree/master/docker/networking https://argus-sec.com/docker-networking-behind-the-scenes/ https://docs.docker.com/network/ https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md https://docs.docker.com/engine/tutorials/networkingcontainers/ https://docs.docker.com/network/iptables/ https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj Khái niệm Các khái niệm:
-Network namespace:
-Trước khi đi vào network namespace, cần hiểu về Namespace. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác).</description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>Mission If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.
-Docker network Let&amp;rsquo;s start with a fact that Docker manipulates iptables rules to provide network isolation, on Linux. Docker installs custom iptables chains named DOCKER, DOCKER-USER and DOCKER-ISOLATION-STAGE-*, and it ensures that incoming packets are always checked by these chains first.
-iptables -L -n Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Docker on kiennt26's home</title><link>https://ntk148v.github.io/tags/docker/</link><description>Recent content in Docker on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Tue, 12 Dec 2023 14:49:04 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/docker/index.xml" rel="self" type="application/rss+xml"/><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>&lt;h1 id="a-clumsy-docker-networking-notes">A clumsy Docker networking notes&lt;/h1>
+&lt;p>Nguồn:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ntk148v/til/tree/master/docker/networking">https://github.com/ntk148v/til/tree/master/docker/networking&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://argus-sec.com/docker-networking-behind-the-scenes/">https://argus-sec.com/docker-networking-behind-the-scenes/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/">https://docs.docker.com/network/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md">https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/engine/tutorials/networkingcontainers/">https://docs.docker.com/engine/tutorials/networkingcontainers/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/iptables/">https://docs.docker.com/network/iptables/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj">https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="khái-niệm">Khái niệm&lt;/h2>
+&lt;ul>
+&lt;li>
+&lt;p>Các khái niệm:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://man7.org/linux/man-pages/man8/ip-netns.8.html">Network namespace&lt;/a>:&lt;/p>
+&lt;ul>
+&lt;li>Trước khi đi vào network namespace, cần hiểu về &lt;strong>Namespace&lt;/strong>. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác). Tính năng này hoạt động bằng cách đưa tập các tài nguyên và process vào cùng một namespace, các namespace khác nhau sẽ tham chiếu đến các tài nguyên riêng biệt. Tài nguyên có thể tồn tại trong nhiều không gian. Ví dụ về các tài nguyên như vậy là process ID, hostname, user ID, tên file và một số tên (name) liên quan đến quyền truy cập mạng và giao tiếp giữa các process.&lt;/li>
+&lt;li>Networking namespace là một trong các loại namespace. Mỗi network namespace có &lt;a href="https://en.wikipedia.org/wiki/Network_stack">network stack&lt;/a> riêng: địa chỉ IP, network interface, route table, &amp;hellip;&lt;/li>
+&lt;li>Bạn có thể xem thao tác các network namespace bằng câu lệnh sau:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">$ sudo ip netns &amp;lt;sub-command&amp;gt;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://wiki.archlinux.org/index.php/Network_bridge">Network bridge&lt;/a>: một thiết bị mạng ảo chuyển tiếp các gói giữa hai hoặc nhiều phân đoạn mạng.&lt;/p></description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>&lt;h2 id="mission">Mission&lt;/h2>
+&lt;p>If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.&lt;/p>
+&lt;h2 id="docker-network">Docker network&lt;/h2>
+&lt;p>Let&amp;rsquo;s start with a fact that Docker manipulates &lt;code>iptables&lt;/code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named &lt;code>DOCKER&lt;/code>, &lt;code>DOCKER-USER&lt;/code> and &lt;code>DOCKER-ISOLATION-STAGE-*&lt;/code>, and it ensures that incoming packets are always checked by these chains first.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables -L -n
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge. You may want to check &lt;a href="https://github.com/ntk148v/til/blob/master/docker/networking/README.md">Docker network note&lt;/a>. I will only show iptables packet flow: For example, we have a host with ip 10.0.10.26, then start a container that is exposed port 8000 to internet.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/ecmp/index.html b/tags/ecmp/index.html
index cbbc487..6c68bb2 100644
--- a/tags/ecmp/index.html
+++ b/tags/ecmp/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/ecmp/index.xml b/tags/ecmp/index.xml
index 2e43bdd..deb611b 100644
--- a/tags/ecmp/index.xml
+++ b/tags/ecmp/index.xml
@@ -1,3 +1,26 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ecmp on kiennt26's home</title><link>https://ntk148v.github.io/tags/ecmp/</link><description>Recent content in Ecmp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ecmp/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ecmp on kiennt26's home</title><link>https://ntk148v.github.io/tags/ecmp/</link><description>Recent content in Ecmp on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ecmp/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item></channel></rss>
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diff --git a/tags/etcd/index.html b/tags/etcd/index.html
index 5ce9f5b..586582a 100644
--- a/tags/etcd/index.html
+++ b/tags/etcd/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/etcd/index.xml b/tags/etcd/index.xml
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--- a/tags/etcd/index.xml
+++ b/tags/etcd/index.xml
@@ -1,3 +1,111 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Etcd on kiennt26's home</title><link>https://ntk148v.github.io/tags/etcd/</link><description>Recent content in Etcd on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/etcd/index.xml" rel="self" type="application/rss+xml"/><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>NOTE: This is my perspective aggregation. You can easily find these such of knowledges in the references.
-Context Etcd Version v3.4.0.
-Requirements Number of nodes &amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with n-members, quorum is (n/2)+1. CPUs Etcd doesn&amp;rsquo;t require a lot of CPU capacity. Typical clusters need 2-4 cores to run smoothly.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Etcd on kiennt26's home</title><link>https://ntk148v.github.io/tags/etcd/</link><description>Recent content in Etcd on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/etcd/index.xml" rel="self" type="application/rss+xml"/><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: This is my perspective aggregation. You can easily find these such of knowledges in &lt;a href="#5-references">the references&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="context">Context&lt;/h2>
+&lt;p>Etcd Version &lt;code>v3.4.0&lt;/code>.&lt;/p>
+&lt;h2 id="requirements">Requirements&lt;/h2>
+&lt;h3 id="number-of-nodes">Number of nodes&lt;/h3>
+&lt;ul>
+&lt;li>&amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with &lt;strong>n-members&lt;/strong>, quorum is &lt;strong>(n/2)+1&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;h3 id="cpus">CPUs&lt;/h3>
+&lt;ul>
+&lt;li>Etcd doesn&amp;rsquo;t require a lot of CPU capacity.&lt;/li>
+&lt;li>Typical clusters need &lt;strong>2-4 cores&lt;/strong> to run smoothly.&lt;/li>
+&lt;/ul>
+&lt;h3 id="memory">Memory&lt;/h3>
+&lt;ul>
+&lt;li>Etcd performance depends on having enough memory (cache key-value data, tracking watchers&amp;hellip;).&lt;/li>
+&lt;li>Typical &lt;strong>8GB&lt;/strong> is enough.&lt;/li>
+&lt;/ul>
+&lt;h3 id="disk">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd cluster is very sensitive to disk latencies. Since etcd must persist proposals to its log, disk activity from other processes may cause long &lt;code>fsync&lt;/code> latencies. The upshot is etcd may miss heartbeats, causing request timeouts and temporary leader loss. An etcd server can sometimes stably run alongside these processes when given a high disk priority.&lt;/li>
+&lt;li>Check whether a disk is fast enough for etcd using &lt;a href="https://github.com/axboe/fio">fio&lt;/a>. If the 99th percentile of fdatasync is &lt;strong>&amp;lt;10ms&lt;/strong>, your storage is ok.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ fio --rw&lt;span class="o">=&lt;/span>write --ioengine&lt;span class="o">=&lt;/span>sync --fdatasync&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --directory&lt;span class="o">=&lt;/span>test-data &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> --size&lt;span class="o">=&lt;/span>22m --bs&lt;span class="o">=&lt;/span>&lt;span class="m">2300&lt;/span> --name&lt;span class="o">=&lt;/span>mytest
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>&lt;strong>SSD&lt;/strong> is recommended.&lt;/li>
+&lt;/ul>
+&lt;h3 id="network">Network&lt;/h3>
+&lt;ul>
+&lt;li>Etcd cluster should be deployed in a fast and reliable network. Low latency ensures etcd members can communicate fast. High bandwidth can reduce the time to recover a failed etcd member.&lt;/li>
+&lt;li>&lt;strong>1GbE&lt;/strong> is sufficient for common etcd.&lt;/li>
+&lt;li>Note that the network isn&amp;rsquo;t the only source of latency. Each request and response may be impacted by slow disks on both the leader and followers.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tuning">Tuning&lt;/h2>
+&lt;h3 id="time-parameters">Time parameters&lt;/h3>
+&lt;ul>
+&lt;li>&lt;code>Heartbeat interval&lt;/code>.
+&lt;ul>
+&lt;li>The frequency with which the leader will notify followers that it is still the leader.&lt;/li>
+&lt;li>Default: &lt;strong>100ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>Around 0.5-1.5 x round-trip time (RTT) between members&lt;/strong>. Measure RTT with &lt;code>ping&lt;/code>.&lt;/li>
+&lt;li>Tradeoff: Too low -&amp;gt; etcd will send unnecessary messages -&amp;gt; increase the usage of CPU and network resources. Too high -&amp;gt; leads to high election timeout.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>&lt;code>Election timeout&lt;/code>.
+&lt;ul>
+&lt;li>How long a follower node will go without hearing a heartbeat before attempting to become leader itself.&lt;/li>
+&lt;li>Default: &lt;strong>1000ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>&amp;gt;= 10 x RTT and &amp;lt; 50s&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>The heartbeat interval and election timeout value should be &lt;strong>the same for all members in one cluster&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --heartbeat-interval&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> --election-timeout&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_HEARTBEAT_INTERVAL&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> &lt;span class="nv">ETCD_ELECTION_TIMEOUT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="disk-1">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd server can sometimes stably run alongside these processes when given a high disk priority using &lt;a href="https://linux.die.net/man/1/ionice">ionice&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># best effort, highest priority&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ sudo ionice -c2 -n0 -p &lt;span class="sb">`&lt;/span>pgrep etcd&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="snapshot">Snapshot&lt;/h3>
+&lt;ul>
+&lt;li>etcd appends all key changes to a log file -&amp;gt; huge log that grows forever :point_up:&lt;/li>
+&lt;li>Solution: Make periodic snapshots (save the current and remove old logs).&lt;/li>
+&lt;li>Default: make snapshots after every &lt;strong>10 000 changes&lt;/strong>.&lt;/li>
+&lt;li>Tuning: Just in case that etcd&amp;rsquo;s memory and disk usage is too high, lower threshold.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --snapshot-count&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_SNAPSHOT_COUNT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="maintenance">Maintenance&lt;/h2>
+&lt;h3 id="history-compaction">History compaction&lt;/h3>
+&lt;ul>
+&lt;li>Etcd keeps an exact history of its keyspace, the history should be periodically compacted to avoid performance degradation and eventual storage space exhaustion.&lt;/li>
+&lt;li>Etcd can be set to automatically compact the keyspace with the &lt;code>--auto-compaction-*&lt;/code> option with a period of hours.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># keep one hour of history&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --auto-compaction-retention&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --auto-compaction-mode&lt;span class="o">=&lt;/span>periodic
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Compaction modes:
+&lt;ul>
+&lt;li>Revision-based: &lt;code>--auto-compaction-mode=revision --auto-compaction-retention=1000&lt;/code> automatically Compact on &amp;ldquo;latest revision&amp;rdquo; - 1000 every 5-minute (when latest revision is 30000, compact on revision 29000). Use this when having a large keyspace.&lt;/li>
+&lt;li>Periodic: &lt;code>--auto-compaction-mode=periodic --auto-compaction-retention=72h&lt;/code> automatically Compact with 72-hour retention window every 1-hour. Use this when having a huge number of revisions for a key-value pair.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h3 id="defragmentation">Defragmentation&lt;/h3>
+&lt;ul>
+&lt;li>Compacting old revisions internally fragments etcd by leaving gaps in backend database - &lt;code>internal fragmentation&lt;/code>.&lt;/li>
+&lt;li>Internal fragmentation space is available for use by etcd but unavailable to the host filesystem.&lt;/li>
+&lt;li>Solution: Release this space back to the filesystem with defrag.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ etcdctl defrag
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>It should be run rather infrequently, as there is always going to be an unavoidable pause.&lt;/li>
+&lt;/ul>
+&lt;h2 id="references">References&lt;/h2>
+&lt;ul>
+&lt;li>Etcd hardware: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md">https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md&lt;/a>&lt;/li>
+&lt;li>Etcd tuning: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md">https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md&lt;/a>&lt;/li>
+&lt;li>Etcd maintainence: &lt;a href="https://etcd.io/docs/v3.4.0/op-guide/maintenance/">https://etcd.io/docs/v3.4.0/op-guide/maintenance/&lt;/a>&lt;/li>
+&lt;/ul></description></item></channel></rss>
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Tags</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/faythe/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Faythe</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Tags</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/faythe/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Faythe</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2019</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/openstack-autoscaling-new-approach/ class=col-span-2>Openstack Autoscaling New Approach</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 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\ No newline at end of file
diff --git a/tags/faythe/index.xml b/tags/faythe/index.xml
index a24f15b..7bfc640 100644
--- a/tags/faythe/index.xml
+++ b/tags/faythe/index.xml
@@ -1,3 +1,6 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Faythe on kiennt26's home</title><link>https://ntk148v.github.io/tags/faythe/</link><description>Recent content in Faythe on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/faythe/index.xml" rel="self" type="application/rss+xml"/><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Faythe on kiennt26's home</title><link>https://ntk148v.github.io/tags/faythe/</link><description>Recent content in Faythe on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/faythe/index.xml" rel="self" type="application/rss+xml"/><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/golang/index.html b/tags/golang/index.html
index 7c3676d..32e2b2f 100644
--- a/tags/golang/index.html
+++ b/tags/golang/index.html
@@ -1,5 +1,5 @@
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class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Tags</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/golang/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Golang</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2023</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-async/ class=col-span-2>Golang Async</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2021</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goignore/ class=col-span-2>Goignore</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/11/26&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-block-forever/ class=col-span-2>Golang: Block forever</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/tags/golang/index.xml b/tags/golang/index.xml
index 96baa8f..f2758bf 100644
--- a/tags/golang/index.xml
+++ b/tags/golang/index.xml
@@ -1,7 +1,90 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Golang on kiennt26's home</title><link>https://ntk148v.github.io/tags/golang/</link><description>Recent content in Golang on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/golang/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>This article is Golang version of Asynchronous programming with async and await guideline. They did really good job to demonstrate how asynchronous programming looks like.
-You can find source code here.
-Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.
-1. Pour a cup of coffee. 2. Heat a pan, then fry two eggs. 3. Fry three slices of bacon. 4. Toast two pieces of bread. 5. Add butter and jam to the toast.</description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>Goignore - A .gitignore wizard which gnerates .gitignore files from the command line for you. Inspired by joe Features No installation necessary - just use the binary. Works on Linux, Windows &amp;amp; MacOS. Interactive user interface with bubbletea: Pagination, Filtering, Help&amp;hellip; Supports all Github-supported .gitignore files. Install Download the latest binary from the Release page. It&amp;rsquo;s the easiest way to get started with goignore. Make sure to add the location of the binary to your $PATH.</description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:
-References Firstly give them some credits:
-https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/ https://pliutau.com/different-ways-to-block-go-runtime-forever/ NOTE: I run these with Golang 1.12
-The original package main import &amp;#34;fmt&amp;#34; func show() { for i := 1; i &amp;lt; 9696969; i++ { time.Sleep(1000) fmt.Println(i) } } func main() { go show() // The main goroutine is exited before the show() be done.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Golang on kiennt26's home</title><link>https://ntk148v.github.io/tags/golang/</link><description>Recent content in Golang on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/golang/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>This article is Golang version of &lt;a href="https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/">Asynchronous programming with async and await guideline&lt;/a>. They did really good job to demonstrate how asynchronous programming looks like.&lt;/p>
+&lt;p>You can find source code &lt;a href="https://github.com/ntk148v/testing/tree/master/golang/breakfast">here&lt;/a>.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Pour a cup of coffee.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Heat a pan, then fry two eggs.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Fry three slices of bacon.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">4. Toast two pieces of bread.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">5. Add butter and jam to the toast.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">6. Pour a glass of orange juice.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Each step takes time to finish, for example, you have to wait X seconds to make a glass of orange juice. Let&amp;rsquo;s write those instructions as Golang:&lt;/p></description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;a href="https://github.com/ntk148v/goignore">Goignore&lt;/a> - A &lt;code>.gitignore&lt;/code> wizard which gnerates &lt;code>.gitignore&lt;/code> files from the command line for you. Inspired by &lt;a href="https://github.com/karan/joe">joe&lt;/a>
+&lt;/blockquote>
+
+&lt;h2 id="features">Features&lt;/h2>
+&lt;ul>
+&lt;li>No installation necessary - just use the binary.&lt;/li>
+&lt;li>Works on Linux, Windows &amp;amp; MacOS.&lt;/li>
+&lt;li>Interactive user interface with &lt;a href="https://github.com/charmbracelet/bubbletea">bubbletea&lt;/a>: Pagination, Filtering, Help&amp;hellip;&lt;/li>
+&lt;li>Supports all Github-supported &lt;a href="https://github.com/github/gitignore.git">.gitignore files&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="install">Install&lt;/h2>
+&lt;ul>
+&lt;li>Download the latest binary from the &lt;a href="https://github.com/ntk148v/goignore/releases">Release page&lt;/a>. It&amp;rsquo;s the easiest way to get started with &lt;code>goignore&lt;/code>.&lt;/li>
+&lt;li>Make sure to add the location of the binary to your &lt;code>$PATH&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="usage">Usage&lt;/h2>
+&lt;ul>
+&lt;li>Just run.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">chmod a+x goignore
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">goignore
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>
+&lt;p>At the first time, &lt;code>goignore&lt;/code> will download the Gitignore templates from Github. It may take a few seconds (depend on your network).&lt;/p></description></item><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>&lt;p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:&lt;/p>
+&lt;h2 id="references">References&lt;/h2>
+&lt;p>Firstly give them some credits:&lt;/p>
+&lt;ol>
+&lt;li>&lt;a href="https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/">https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://pliutau.com/different-ways-to-block-go-runtime-forever/">https://pliutau.com/different-ways-to-block-go-runtime-forever/&lt;/a>&lt;/li>
+&lt;/ol>
+&lt;blockquote>
+&lt;p>NOTE: I run these with Golang 1.12&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="the-original">The original&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">1000&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="c1">// The main goroutine is exited before the show() be done.
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="bad---an-empty-infinite-loop">Bad - An empty infinite loop&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="p">(&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;time&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="c1">// Empty, just do nothing
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">5&lt;/span> &lt;span class="o">*&lt;/span> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nx">Second&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>An infinite loop here is a busy loop that does nothing except burn CPU time.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/hugo/index.html b/tags/hugo/index.html
index b107d9e..0ac9555 100644
--- a/tags/hugo/index.html
+++ b/tags/hugo/index.html
@@ -1,5 +1,5 @@
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hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2023</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goat-playground/ class=col-span-2>Goat Playground</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 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\ No newline at end of file
diff --git a/tags/hugo/index.xml b/tags/hugo/index.xml
index 627a3e6..d21a3ba 100644
--- a/tags/hugo/index.xml
+++ b/tags/hugo/index.xml
@@ -1,2 +1,788 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hugo on kiennt26's home</title><link>https://ntk148v.github.io/tags/hugo/</link><description>Recent content in Hugo on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/hugo/index.xml" rel="self" type="application/rss+xml"/><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>Hey, this is a simple post to play with GoAT Diagram.
-a W L A i a n p b d t o o w p s 1 B I n W t i e F r i n e t a L a S O p e S t b r o v X p e r 2 C A l o B u l d u e t B o o t h T a a i b O l S e t b 1 D · · · · · a U D A t b e a · · a # u d b n i · · · · a t c s # u a b · · · · · e t B e · · · d L S A e · N r · · v · · · e · · U r · · b · # u R · n a · · t c · # u k</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hugo on kiennt26's home</title><link>https://ntk148v.github.io/tags/hugo/</link><description>Recent content in Hugo on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/hugo/index.xml" rel="self" type="application/rss+xml"/><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>&lt;p>Hey, this is a simple post to play with &lt;a href="https://github.com/blampe/goat">GoAT Diagram&lt;/a>.&lt;/p>
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diff --git a/tags/i3/index.xml b/tags/i3/index.xml
index 44b2412..257ac2d 100644
--- a/tags/i3/index.xml
+++ b/tags/i3/index.xml
@@ -1,3 +1,8 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>I3 on kiennt26's home</title><link>https://ntk148v.github.io/tags/i3/</link><description>Recent content in I3 on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/i3/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>I3 on kiennt26's home</title><link>https://ntk148v.github.io/tags/i3/</link><description>Recent content in I3 on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/i3/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/index.html b/tags/index.html
index 03ca1cf..0f1e11a 100644
--- a/tags/index.html
+++ b/tags/index.html
@@ -1,5 +1,5 @@
 <!doctype html><html lang=en><head><meta charset=utf-8><meta name=description content="Author: Kien Nguyen <kiennt2609@gmail.com>
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justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Tags</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2024</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/linux/ class=col-span-2>Linux</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tech/ class=col-span-2>Tech</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tool/ class=col-span-2>Tool</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2023</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/docker/ class=col-span-2>Docker</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/12/12&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/non-tech/ class=col-span-2>Non-Tech</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ramblings/ class=col-span-2>Ramblings</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/thoughts/ class=col-span-2>Thoughts</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ansible/ class=col-span-2>Ansible</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/golang/ class=col-span-2>Golang</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/csharp/ class=col-span-2>Csharp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/shell/ class=col-span-2>Shell</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/algorithm/ class=col-span-2>Algorithm</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/techniques/ class=col-span-2>Techniques</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/hugo/ class=col-span-2>Hugo</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/playground/ class=col-span-2>Playground</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2022</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tiling-vm/ class=col-span-2>Tiling-Vm</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/01/10&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/bgp/ class=col-span-2>Bgp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ecmp/ class=col-span-2>Ecmp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/network/ class=col-span-2>Network</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/iptables/ class=col-span-2>Iptables</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/10/25&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2021</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tips/ class=col-span-2>Tips</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/i3/ class=col-span-2>I3</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/polybar/ class=col-span-2>Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div 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my-2"><a href=/tags/note/ class=col-span-2>Note</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/trick/ class=col-span-2>Trick</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/etcd/ class=col-span-2>Etcd</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/28&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/prometheus/ class=col-span-2>Prometheus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/basketball/ class=col-span-2>Basketball</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/01/27&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2019</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/faythe/ class=col-span-2>Faythe</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/openstack/ class=col-span-2>Openstack</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path 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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Tags</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div></div></header><main class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Tags</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2024</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/linux/ class=col-span-2>Linux</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/12/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tech/ class=col-span-2>Tech</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/12/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tips/ class=col-span-2>Tips</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/12/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tool/ class=col-span-2>Tool</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2024/06/20&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2023</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/docker/ class=col-span-2>Docker</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/12/12&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/non-tech/ class=col-span-2>Non-Tech</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ramblings/ class=col-span-2>Ramblings</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/thoughts/ class=col-span-2>Thoughts</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ansible/ class=col-span-2>Ansible</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/golang/ class=col-span-2>Golang</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/csharp/ class=col-span-2>Csharp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/shell/ class=col-span-2>Shell</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/algorithm/ class=col-span-2>Algorithm</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/techniques/ class=col-span-2>Techniques</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/18&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/hugo/ class=col-span-2>Hugo</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/playground/ class=col-span-2>Playground</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2022</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tiling-vm/ class=col-span-2>Tiling-Vm</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/01/10&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/bgp/ class=col-span-2>Bgp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/ecmp/ class=col-span-2>Ecmp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/network/ class=col-span-2>Network</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/iptables/ class=col-span-2>Iptables</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/10/25&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2021</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/i3/ class=col-span-2>I3</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/polybar/ class=col-span-2>Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/rofi/ class=col-span-2>Rofi</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/tiling-wm/ class=col-span-2>Tiling-Wm</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/compton/ class=col-span-2>Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/xresources/ class=col-span-2>Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/note/ class=col-span-2>Note</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/trick/ class=col-span-2>Trick</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/etcd/ class=col-span-2>Etcd</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/28&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/prometheus/ class=col-span-2>Prometheus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/basketball/ class=col-span-2>Basketball</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/01/27&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2019</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/faythe/ class=col-span-2>Faythe</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/tags/openstack/ class=col-span-2>Openstack</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" 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diff --git a/tags/index.xml b/tags/index.xml
index 3a05a99..3db818c 100644
--- a/tags/index.xml
+++ b/tags/index.xml
@@ -1 +1 @@
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\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tags on kiennt26's home</title><link>https://ntk148v.github.io/tags/</link><description>Recent content in Tags on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux</title><link>https://ntk148v.github.io/tags/linux/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/linux/</guid><description/></item><item><title>Tech</title><link>https://ntk148v.github.io/tags/tech/</link><pubDate>Thu, 05 Dec 2024 09:44:34 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+0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/network/</guid><description/></item><item><title>Tiling-Vm</title><link>https://ntk148v.github.io/tags/tiling-vm/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/tiling-vm/</guid><description/></item><item><title>Compton</title><link>https://ntk148v.github.io/tags/compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/compton/</guid><description/></item><item><title>I3</title><link>https://ntk148v.github.io/tags/i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/i3/</guid><description/></item><item><title>Polybar</title><link>https://ntk148v.github.io/tags/polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/polybar/</guid><description/></item><item><title>Rofi</title><link>https://ntk148v.github.io/tags/rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/rofi/</guid><description/></item><item><title>Tiling-Wm</title><link>https://ntk148v.github.io/tags/tiling-wm/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/tags/tiling-wm/</guid><description/></item><item><title>Xresources</title><link>https://ntk148v.github.io/tags/xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 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diff --git a/tags/iptables/index.html b/tags/iptables/index.html
index 44608e0..4dee06c 100644
--- a/tags/iptables/index.html
+++ b/tags/iptables/index.html
@@ -1,5 +1,5 @@
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hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2022</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/docker-iptables/ class=col-span-2>Docker and Iptables: You may do it wrong!</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/10/25&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 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diff --git a/tags/iptables/index.xml b/tags/iptables/index.xml
index 048ca2c..e2a47cf 100644
--- a/tags/iptables/index.xml
+++ b/tags/iptables/index.xml
@@ -1,3 +1,6 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Iptables on kiennt26's home</title><link>https://ntk148v.github.io/tags/iptables/</link><description>Recent content in Iptables on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/iptables/index.xml" rel="self" type="application/rss+xml"/><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>Mission If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.
-Docker network Let&amp;rsquo;s start with a fact that Docker manipulates iptables rules to provide network isolation, on Linux. Docker installs custom iptables chains named DOCKER, DOCKER-USER and DOCKER-ISOLATION-STAGE-*, and it ensures that incoming packets are always checked by these chains first.
-iptables -L -n Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Iptables on kiennt26's home</title><link>https://ntk148v.github.io/tags/iptables/</link><description>Recent content in Iptables on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/iptables/index.xml" rel="self" type="application/rss+xml"/><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>&lt;h2 id="mission">Mission&lt;/h2>
+&lt;p>If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.&lt;/p>
+&lt;h2 id="docker-network">Docker network&lt;/h2>
+&lt;p>Let&amp;rsquo;s start with a fact that Docker manipulates &lt;code>iptables&lt;/code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named &lt;code>DOCKER&lt;/code>, &lt;code>DOCKER-USER&lt;/code> and &lt;code>DOCKER-ISOLATION-STAGE-*&lt;/code>, and it ensures that incoming packets are always checked by these chains first.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables -L -n
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge. You may want to check &lt;a href="https://github.com/ntk148v/til/blob/master/docker/networking/README.md">Docker network note&lt;/a>. I will only show iptables packet flow: For example, we have a host with ip 10.0.10.26, then start a container that is exposed port 8000 to internet.&lt;/p></description></item></channel></rss>
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diff --git a/tags/linux/index.html b/tags/linux/index.html
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--- a/tags/linux/index.html
+++ b/tags/linux/index.html
@@ -1,5 +1,5 @@
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class=col-span-2>Getting Started with Tiling WM [Part 3] - Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/set-animated-gif-as-wallpaper/ class=col-span-2>Set Animated Gif as Wallpaper</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/01/14&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class=col-span-2>Getting Started with Tiling WM [Part 4] - Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-5-compton/ class=col-span-2>Getting Started with Tiling WM [Part 5] - Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/rename-files-in-linux/ class=col-span-2>Rename Files in Linux</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/12/16&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-swap-space-note/ class=col-span-2>Swap space note</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/20&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
 2024
 <a href=https://github.com/ntk148v/hugo-toigian class="font-bold hover:underline">hugo-toigian</a></span><div id=header-theme-button><svg id="dark_mode_btn" class="hidden toolbox-btn" width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M21.752 15.002A9.718 9.718.0 0118 15.75c-5.385.0-9.75-4.365-9.75-9.75.0-1.33.266-2.597.748-3.752A9.753 9.753.0 003 11.25C3 16.635 7.365 21 12.75 21a9.753 9.753.0 009.002-5.998z"/></svg><svg id="light_mode_btn" class="hidden toolbox-btn" width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12 3v2.25m6.364.386-1.591 1.591M21 12h-2.25m-.386 6.364-1.591-1.591M12 18.75V21m-4.773-4.227-1.591 1.591M5.25 12H3m4.227-4.773L5.636 5.636M15.75 12a3.75 3.75.0 11-7.5.0 3.75 3.75.0 017.5.0z"/></svg></div></div></div></footer></body></html>
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diff --git a/tags/linux/index.xml b/tags/linux/index.xml
index 59da9ea..0e37bb8 100644
--- a/tags/linux/index.xml
+++ b/tags/linux/index.xml
@@ -1,31 +1,623 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Linux on kiennt26's home</title><link>https://ntk148v.github.io/tags/linux/</link><description>Recent content in Linux on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 19 Jul 2024 08:53:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/linux/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>Source:
-https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/ https://www.digitalocean.com/community/tutorials/atop-command-in-linux https://www.atoptool.nl/index.php top is great, we&amp;rsquo;re all familiar with it. htop is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data.</description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>Environment: Ubuntu 22.04, but it should work in other Linux distributions.
-Source: https://www.sobyte.net/post/2023-03/linux-services-in-the-background/
-You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?
-graph TD A(You don't want to wait for a running command) --> B{Do you want to see output?} A --> C{Do you want the command to stay running after the session ends?</description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>The following content is from my #til github. Source
-https://github.com/leandromoreira/linux-network-performance-parameters/ https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/ https://blog.cloudflare.com/how-to-achieve-low-latency/ https://blog.cloudflare.com/how-to-receive-a-million-packets/ https://beej.us/guide/bgnet/html/ https://blog.csdn.net/armlinuxww/article/details/111930788 https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning Linux Networking stack Source:
-https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/
-https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/
-https://juejin.cn/post/7106345054368694280
-https://openwrt.org/docs/guide-developer/networking/praxis
-https://blog.51cto.com/u_15169172/2710604
-https://sn0rt.github.io/media/paper/TCPlinux.pdf
-https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8
-The complete network data flow:
-It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets. Linux queue: NOTE: The follow sections will heavily use sysctl. If you don&amp;rsquo;t familiar with this command, take a look at HOWTO#sysctl section.</description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>Iptables Source:
-https://www.thegeekstuff.com/2011/01/iptables-fundamentals/
-https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html
-https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
-https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/ - advanced
-Iptables
-1. Introduction 2. Netfilter hooks 3. iptables tables and chains 4. iptables rules 5. iptables drawbacks 6. iptables TRACE 1. Introduction iptables is used to manage packet filtering and NAT rules. iptables works with the kernel netfilter packet filtering framework. iptables is replaced with nftables, but iptables syntax is still commonly used as a baseline. iptables on a high-level. iptables tables chains rules 2.</description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>According to Reddis post and i3-gaps issue, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer doesn&amp;rsquo;t like it. But nevermind, we still have two ways to achieve it.
-Rounded i3-gaps Resloved have an awesome fork to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it here.
-Install i3-gaps. # Dependencies sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.</description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>Rename a single file with mv. Just a basic thing. Rename multiple files with mv. # Rename files with suffix .yaml to yml for f in *.yaml; do mv -- &amp;#34;$f&amp;#34; &amp;#34;${f%.yaml}.yml&amp;#34; done Rename multiple files with rename. # Install rename command # Ubuntu/Debian-derived distros sudo apt install rename # RedHat-derived distros sudo yum install prename # The follow examples are performed in Ubuntu/Debian-derived distros rename &amp;#39;s/.yaml/.yml/&amp;#39; *.yaml # Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34; rename &amp;#39;s/prev_/next_&amp;#39; *.</description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description> WIP</description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>bat - (cat alternative) bat: A cat(1) clone with syntax highlighting and Git integration. Example: fd - (find alternative) fd: a simple, fast and user-friendly alternative to find. Examples: httpie - (wget/curl alternative) httpie: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more. Examples: # Hello world $ http httpie.io/hello # Custom HTTP method, HTTP headers and JSON data $ http PUT pie.</description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>NOTE: Environment Ubuntu 20.04
-Dependencies Xwinwrap: sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev git clone https://github.com/ujjwal96/xwinwrap.git cd xwinwrap make sudo make install make clean Gifsicle: sudo apt install gifsicle The helper script A helper script to setup animated .gif in dual monitors.
-#!/bin/bash # Uses xwinwrap to display given animated .gif in dual monitors. if [ $# -ne 1 ]; then echo 1&amp;gt;&amp;amp;2 Usage: $0 image.gif exit 1 fi gif=$1 killall -9 xwinwrap killall -9 gifview # Get monitors resolution SCR1=`xrandr | awk &amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;` SCR2=`xrandr | awk &amp;#39;!</description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>What is Swap? Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.
-Swap partition size Old rule of thumb swap: 2 * the-amount-of-RAM So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Linux on kiennt26's home</title><link>https://ntk148v.github.io/tags/linux/</link><description>Recent content in Linux on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/linux/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux Magic System Request Key Hacks</title><link>https://ntk148v.github.io/posts/linux-sysrq/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-sysrq/</guid><description>&lt;p>Source: &lt;a href="https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html">https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html&lt;/a>&lt;/p>
+&lt;h2 id="giới-thiệu">Giới thiệu&lt;/h2>
+&lt;p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &amp;ldquo;treo&amp;rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng &lt;strong>Magic System Request Key (SysRq)&lt;/strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?&lt;/p>
+&lt;p>SysRq là một tính năng của Linux, cho phép người dùng gửi &amp;ldquo;tín hiệu cầu cứu&amp;rdquo; trực tiếp đến kernel của hệ điều hành.&lt;/p></description></item><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop">https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop&lt;/a>&lt;/li>
+&lt;li>&lt;a href="http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/">http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.digitalocean.com/community/tutorials/atop-command-in-linux">https://www.digitalocean.com/community/tutorials/atop-command-in-linux&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.atoptool.nl/index.php">https://www.atoptool.nl/index.php&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>top&lt;/code> is great, we&amp;rsquo;re all familiar with it. &lt;code>htop&lt;/code> is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But &lt;a href="https://www.atoptool.nl/index.php">&lt;code>atop&lt;/code>&lt;/a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &amp;ndash; in real time or &lt;em>historically&lt;/em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.&lt;/p></description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>&lt;strong>Environment:&lt;/strong> Ubuntu 22.04, but it should work in other Linux distributions.&lt;/p>
+&lt;p>&lt;strong>Source&lt;/strong>: &lt;a href="https://www.sobyte.net/post/2023-03/linux-services-in-the-background/">https://www.sobyte.net/post/2023-03/linux-services-in-the-background/&lt;/a>&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?&lt;/p>
+
+&lt;div class="mermaid" align="center">
+graph TD
+A(You don't want to wait &lt;br>for a running command) --> B{Do you want to see output?}
+A --> C{Do you want the command to stay &lt;br>running after the session ends?}
+C --> |Yes| E(screen)
+B --> |No| D(Ctrl-Z or &amp;)
+B --> |Yes| F{Do you have requirements &lt;br>for log cutting, running users?}
+F --> |No| G(nohup)
+F --> |Yes| H(supervisor or systemd)
+&lt;/div>
+
+&lt;h2 id="ctrl-z-or-">Ctrl-Z or &amp;amp;&lt;/h2>
+&lt;p>For example, you have to excute &lt;code>ping&lt;/code> command:&lt;/p></description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is from &lt;a href="https://github.com/ntk148v/til/blob/master/linux/network-performance-ultimate-guide.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;p>&lt;strong>Source&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/leandromoreira/linux-network-performance-parameters/">https://github.com/leandromoreira/linux-network-performance-parameters/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf">https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/">https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-achieve-low-latency/">https://blog.cloudflare.com/how-to-achieve-low-latency/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-receive-a-million-packets/">https://blog.cloudflare.com/how-to-receive-a-million-packets/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://beej.us/guide/bgnet/html/">https://beej.us/guide/bgnet/html/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.csdn.net/armlinuxww/article/details/111930788">https://blog.csdn.net/armlinuxww/article/details/111930788&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning">https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="linux-networking-stack">Linux Networking stack&lt;/h2>
+&lt;p>&lt;strong>Source:&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/">https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://juejin.cn/post/7106345054368694280">https://juejin.cn/post/7106345054368694280&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://openwrt.org/docs/guide-developer/networking/praxis">https://openwrt.org/docs/guide-developer/networking/praxis&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.51cto.com/u_15169172/2710604">https://blog.51cto.com/u_15169172/2710604&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://sn0rt.github.io/media/paper/TCPlinux.pdf">https://sn0rt.github.io/media/paper/TCPlinux.pdf&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8">https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>The complete network data flow:&lt;/p>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="http://web.archive.org/web/20170905131225if_/https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png" alt="">&lt;/p>
+&lt;ul>
+&lt;li>It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets.&lt;/li>
+&lt;li>Linux queue:&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://github.com/leandromoreira/linux-network-performance-parameters/raw/master/img/linux_network_flow.png" alt="">&lt;/p>
+&lt;p>&lt;strong>NOTE&lt;/strong>: The follow sections will heavily use &lt;code>sysctl&lt;/code>. If you don&amp;rsquo;t familiar with this command, take a look at &lt;a href="#204-sysctl">HOWTO#sysctl section&lt;/a>.&lt;/p></description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>&lt;h1 id="iptables">Iptables&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://www.thegeekstuff.com/2011/01/iptables-fundamentals/">https://www.thegeekstuff.com/2011/01/iptables-fundamentals/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html">https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture">https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/">https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/&lt;/a> - advanced&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="#iptables">Iptables&lt;/a>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-netfilter-hooks">2. Netfilter hooks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#3-iptables-tables-and-chains">3. iptables tables and chains&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#4-iptables-rules">4. iptables rules&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#5-iptables-drawbacks">5. iptables drawbacks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#6-iptables-trace">6. iptables TRACE&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="1-introduction">1. Introduction&lt;/h2>
+&lt;ul>
+&lt;li>iptables is used to manage packet filtering and NAT rules.&lt;/li>
+&lt;li>iptables works with the kernel &lt;code>netfilter&lt;/code> packet filtering framework.
+&lt;ul>
+&lt;li>iptables is replaced with &lt;code>nftables&lt;/code>, but &lt;code>iptables&lt;/code> syntax is still commonly used as a baseline.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>iptables on a high-level.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> chains
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rules
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-netfilter-hooks">2. Netfilter hooks&lt;/h2>
+&lt;ul>
+&lt;li>There are 4 netfilter hooks that programs can register with. As packets progress through the stack, they will trigger the kernel modules that have registered with these hooks.
+&lt;ul>
+&lt;li>&lt;code>NF_IP_PRE_ROUTING&lt;/code>: triggered by any incoming traffic very soon after entering network stack. This hook is processed before any routing decisions have been made regarding where to send the packet.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_IN&lt;/code>: triggered after an incoming packet has been routed if the packet is destined for the local system.&lt;/li>
+&lt;li>&lt;code>NF_IP_FORWARD&lt;/code>: triggered after an incoming packet has been routed if the packet is to be forwarded to another host.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_OUT&lt;/code>: triggered by any locally created outbound traffic as soon as it hits the network stack.&lt;/li>
+&lt;li>&lt;code>NF_IP_POST_ROUTING&lt;/code>: triggerd by any outgoing or forwarded traffic after routing has taken place and just before being sent out on the wire.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://people.netfilter.org/pablo/nf-hooks.png" alt="">&lt;/p></description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>&lt;p>According to &lt;a href="https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/">Reddis post&lt;/a> and &lt;a href="https://github.com/Airblader/i3/issues/167">i3-gaps issue&lt;/a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-328562433">doesn&amp;rsquo;t like it&lt;/a>. But nevermind, we still have two ways to achieve it.&lt;/p>
+&lt;h2 id="rounded-i3-gaps">Rounded i3-gaps&lt;/h2>
+&lt;p>&lt;a href="https://github.com/resloved">Resloved&lt;/a> have an awesome &lt;a href="https://github.com/resloved/i3">fork&lt;/a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it &lt;a href="https://github.com/ntk148v/i3">here&lt;/a>.&lt;/p>
+&lt;ul>
+&lt;li>Install i3-gaps.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Dependencies&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-util0-dev libxcb-icccm4-dev libyajl-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libstartup-notification0-dev libxcb-randr0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libev-dev libxcb-cursor-dev libxcb-xinerama0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> autoconf libxcb-xrm0 libxcb-xrm-dev automake i3status &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> ninja-build meson libxcb-shape0-dev build-essential -y
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ntk148v/i3.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> i3/
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Compile&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mkdir -p build &lt;span class="o">&amp;amp;&amp;amp;&lt;/span> &lt;span class="nb">cd&lt;/span> build
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">meson ..
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">ninja
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo ninja install
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Configure rounded corners by adding this to your config.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">border_radius 10
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result, but you can see that these corners look so jagged (check out this &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-485263770">comment&lt;/a>).&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-1.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-4.png">
+&lt;/figure>
+
+&lt;h2 id="picom">picom&lt;/h2>
+&lt;ul>
+&lt;li>You can also achieve rounded corners by using &lt;a href="https://github.com/yshui/picom">picom&lt;/a>.&lt;/li>
+&lt;li>Install picom.&lt;/li>
+&lt;li>Configure rounded corners by changing &lt;code>corner_radius&lt;/code> value.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl"># Path ~/.config/picom.conf
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">corner_radius: 10;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result looks much smoother.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-2.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-3.png">
+&lt;/figure></description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>&lt;ul>
+&lt;li>Rename a single file with &lt;code>mv&lt;/code>. Just a basic thing.&lt;/li>
+&lt;li>Rename multiple files with &lt;code>mv&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Rename files with suffix .yaml to yml&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">for&lt;/span> f in *.yaml&lt;span class="p">;&lt;/span> &lt;span class="k">do&lt;/span> mv -- &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="nv">$f&lt;/span>&lt;span class="s2">&amp;#34;&lt;/span> &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="si">${&lt;/span>&lt;span class="nv">f&lt;/span>&lt;span class="p">%.yaml&lt;/span>&lt;span class="si">}&lt;/span>&lt;span class="s2">.yml&amp;#34;&lt;/span> &lt;span class="k">done&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Rename multiple files with &lt;code>rename&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Install rename command&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install rename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># RedHat-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo yum install prename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># The follow examples are performed in Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/.yaml/.yml/&amp;#39;&lt;/span> *.yaml
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/prev_/next_&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Delete part of a filename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/next_//&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Limit changes to specific parts of filenames&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Only change the files that start with &amp;#34;paramater&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/^param/parameter/&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Search with grouping&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;string&amp;#34; and &amp;#34;strong&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/(str|stro)ng/strength&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Use translations with rename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Force filenames to uppercase&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;y/a-z/A-Z&amp;#39;&lt;/span> *.py
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># More?&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">man rename
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>&lt;h2 id="bat---cat-alternative">bat - (cat alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/bat">bat&lt;/a>: A cat(1) clone with syntax highlighting and Git integration.&lt;/li>
+&lt;li>Example:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/bat.png">
+&lt;/figure>
+
+&lt;h2 id="fd---find-alternative">fd - (find alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/fd">fd&lt;/a>: a simple, fast and user-friendly alternative to &lt;code>find&lt;/code>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg">
+&lt;/figure>
+
+&lt;h2 id="httpie---wgetcurl-alternative">httpie - (wget/curl alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://httpie.io">httpie&lt;/a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Hello world&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http httpie.io/hello
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Custom HTTP method, HTTP headers and JSON data&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http PUT pie.dev/put X-API-Token:123 &lt;span class="nv">name&lt;/span>&lt;span class="o">=&lt;/span>John
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Submitting forms&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http -f POST pie.dev/post &lt;span class="nv">hello&lt;/span>&lt;span class="o">=&lt;/span>World
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Upload a file using redirect input&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http pie.dev/post &amp;lt; files/data.json
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://httpie.io&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="ripgrep---grep-alternative">ripgrep - (grep alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep">ripgrep&lt;/a>: a faster &lt;code>grep&lt;/code>. ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.&lt;/li>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep#quick-examples-comparing-tools">Benchmark&lt;/a>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Basic use&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg fast README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Regular expressions&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fast\w+&amp;#39;&lt;/span> README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Recursive search - recursively searching the directory (current directory is default)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fn write\(&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="delta">delta&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/dandavison/delta">delta&lt;/a>: Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.&lt;/li>
+&lt;li>Diff/git diff doesn&amp;rsquo;t show you exactly what was changed.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/git-diff.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Delta shows within-line highlights based on a Levenshtein edit inference algorithm.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/delta.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>By default, delta restructures the git output slightly to make the hunk markers human-readable:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://user-images.githubusercontent.com/52205/81059276-254cf980-8e9e-11ea-95c3-8b757a4c11b5.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Example config:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>core&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> pager: delta
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>delta&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> plus-style: &lt;span class="s2">&amp;#34;syntax #98c379&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> minus-style: &lt;span class="s2">&amp;#34;syntax #e06c75&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> syntax-theme: OneHalfDark
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> navigate: &lt;span class="nb">true&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> features: line-numbers decorations
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>interactive&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> diffFilter: delta --color-only
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Completely replace &lt;code>diff&lt;/code> with &lt;code>delta&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">diff&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;delta&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="z">z&lt;/h2>
+&lt;ul>
+&lt;li>Tired for &lt;code>cd&lt;/code>ing into the same directories over and over? Save your time with &lt;code>z&lt;/code> command!&lt;/li>
+&lt;li>&lt;a href="https://github.com/rupa/z">z&lt;/a>: jump around. Z is a shell script that makes jumping around your file directory pleasantly simple. Instead of trying to remember the exact path of where you need to go, or worse, &lt;code>cd&lt;/code>ing into the next directory followed by &lt;code>ls&lt;/code>ing and then cding again over and over (we’ve all been there), Z allows you to “lazy type” where you want to go and it’ll handle the rest.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Takes me to my workspace folder from anywhere.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ z workspace
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="fzf">fzf&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/junegunn/fzf">fzf&lt;/a>: fzf is a general-purpose command-line fuzzy finder.&lt;/li>
+&lt;li>It&amp;rsquo;s an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Read the list from STDIN and write the selected item to STDOUT&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ find * -type f &lt;span class="p">|&lt;/span> fzf &amp;gt; selected
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim &lt;span class="k">$(&lt;/span>fzf&lt;span class="k">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># COMMAND **&amp;lt;TAB&amp;gt;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under the current directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># - You can select multiple items with TAB key&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under your home directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ~/**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under current directory (single-selection)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under ~/github that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> ~/github/fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Can select multiple processes with &amp;lt;TAB&amp;gt; or &amp;lt;Shift-TAB&amp;gt; keys&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">kill&lt;/span> -9 &amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unset&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">export&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unalias&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/junegunn/fzf&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-vim.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-cd.png">
+&lt;/figure>
+
+&lt;h2 id="thefuck">thefuck&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/nvbn/thefuck">thefuck&lt;/a>: Magnificent app which corrects your previous console command.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ apt-get install vim
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Could not open lock file /var/lib/dpkg/lock - open &lt;span class="o">(&lt;/span>13: Permission denied&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Unable to lock the administration directory &lt;span class="o">(&lt;/span>/var/lib/dpkg/&lt;span class="o">)&lt;/span>, are you root?
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ fuck
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt-get install vim &lt;span class="o">[&lt;/span>enter/↑/↓/ctrl+c&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">Reading package lists... Done
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">...
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://github.com/nvbn/thefuck&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="exa---ls-alternative">exa - (ls alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://the.exa.website">exa&lt;/a>: A modern replacement for ls. &lt;code>exa&lt;/code> is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Completely replace &lt;code>ls&lt;/code> with &lt;code>exa&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">ls&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;exa&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa-ls.png">
+&lt;/figure></description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Environment Ubuntu 20.04&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="dependencies">Dependencies&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ujjwal96/xwinwrap">Xwinwrap&lt;/a>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ujjwal96/xwinwrap.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo make install
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make clean
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Gifsicle:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install gifsicle
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="the-helper-script">The helper script&lt;/h2>
+&lt;p>A helper script to setup animated .gif in dual monitors.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="cp">#!/bin/bash
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="cp">&lt;/span>&lt;span class="c1"># Uses xwinwrap to display given animated .gif in dual monitors.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">if&lt;/span> &lt;span class="o">[&lt;/span> &lt;span class="nv">$#&lt;/span> -ne &lt;span class="m">1&lt;/span> &lt;span class="o">]&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="k">then&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">echo&lt;/span> 1&amp;gt;&lt;span class="p">&amp;amp;&lt;/span>&lt;span class="m">2&lt;/span> Usage: &lt;span class="nv">$0&lt;/span> image.gif
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">exit&lt;/span> &lt;span class="m">1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">fi&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">gif&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nv">$1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 gifview
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Get monitors resolution&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR1&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR2&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;!/primary/ &amp;amp;&amp;amp; /connected/ { print $3 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR1&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR2&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>If you want to run xwinwrap by yourself, here is the example:&lt;/p></description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>&lt;h2 id="what-is-swap">What is Swap?&lt;/h2>
+&lt;p>Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.&lt;/p>
+&lt;h2 id="swap-partition-size">Swap partition size&lt;/h2>
+&lt;h3 id="old-rule-of-thumb">Old rule of thumb&lt;/h3>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">swap: 2 * the-amount-of-RAM
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time. Nowadays, RAM has become a &lt;code>cheap&lt;/code> &amp;amp; &lt;code>affordable&lt;/code> commondity, so the 2x rule is outdated.&lt;/p></description></item></channel></rss>
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diff --git a/tags/network/index.xml b/tags/network/index.xml
index 3a18d4e..b173e69 100644
--- a/tags/network/index.xml
+++ b/tags/network/index.xml
@@ -1,3 +1,26 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Network on kiennt26's home</title><link>https://ntk148v.github.io/tags/network/</link><description>Recent content in Network on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/network/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Network on kiennt26's home</title><link>https://ntk148v.github.io/tags/network/</link><description>Recent content in Network on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/network/index.xml" rel="self" type="application/rss+xml"/><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item></channel></rss>
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diff --git a/tags/non-tech/index.html b/tags/non-tech/index.html
index a980cc1..8746f5a 100644
--- a/tags/non-tech/index.html
+++ b/tags/non-tech/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/non-tech/index.xml b/tags/non-tech/index.xml
index b335db4..472e7b7 100644
--- a/tags/non-tech/index.xml
+++ b/tags/non-tech/index.xml
@@ -1,3 +1,10 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Non-Tech on kiennt26's home</title><link>https://ntk148v.github.io/tags/non-tech/</link><description>Recent content in Non-Tech on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/non-tech/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>A collection of interesting thoughts and opinions that I come across Willingness to look stupid Willingness to look stupidhttps://t.co/0WrVAzLQ6g pic.twitter.com/6NjysMwbch
-&amp;mdash; Dan Luu (@danluu) October 21, 2021 I recently read this article by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.
-People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Non-Tech on kiennt26's home</title><link>https://ntk148v.github.io/tags/non-tech/</link><description>Recent content in Non-Tech on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/non-tech/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ A collection of interesting thoughts and opinions that I come across
+&lt;/blockquote>
+
+&lt;h2 id="willingness-to-look-stupid">Willingness to look stupid&lt;/h2>
+&lt;div align="center">
+ &lt;blockquote class="twitter-tweet">&lt;p lang="en" dir="ltr">Willingness to look stupid&lt;a href="https://t.co/0WrVAzLQ6g">https://t.co/0WrVAzLQ6g&lt;/a> &lt;a href="https://t.co/6NjysMwbch">pic.twitter.com/6NjysMwbch&lt;/a>&lt;/p>&amp;mdash; Dan Luu (@danluu) &lt;a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021&lt;/a>&lt;/blockquote> &lt;script async src="https://platform.twitter.com/widgets.js" charset="utf-8">&lt;/script>
+&lt;/div>
+&lt;p>I recently read &lt;a href="https://danluu.com/look-stupid/">this article&lt;/a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.&lt;/p>
+&lt;p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:. I&amp;rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &amp;hellip;). And I know that I&amp;rsquo;m not the only one, look smart but being stupid.&lt;/p></description></item></channel></rss>
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diff --git a/tags/note/index.html b/tags/note/index.html
index 0cb9825..2193466 100644
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+++ b/tags/note/index.html
@@ -1,5 +1,5 @@
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class="flex justify-center px-page-gutter py-page-top"><div class="min-h-content w-full max-w-content space-y-10 sm:space-y-20"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Tags</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/note/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Note</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide hover:underline">Posts</a></li></ul></nav></div><article><div class=content></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-block-forever/ class=col-span-2>Golang: Block forever</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/27&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 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diff --git a/tags/note/index.xml b/tags/note/index.xml
index 9cdc5af..897e223 100644
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+++ b/tags/note/index.xml
@@ -1,4 +1,53 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Note on kiennt26's home</title><link>https://ntk148v.github.io/tags/note/</link><description>Recent content in Note on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/note/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:
-References Firstly give them some credits:
-https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/ https://pliutau.com/different-ways-to-block-go-runtime-forever/ NOTE: I run these with Golang 1.12
-The original package main import &amp;#34;fmt&amp;#34; func show() { for i := 1; i &amp;lt; 9696969; i++ { time.Sleep(1000) fmt.Println(i) } } func main() { go show() // The main goroutine is exited before the show() be done.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Note on kiennt26's home</title><link>https://ntk148v.github.io/tags/note/</link><description>Recent content in Note on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/note/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>&lt;p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:&lt;/p>
+&lt;h2 id="references">References&lt;/h2>
+&lt;p>Firstly give them some credits:&lt;/p>
+&lt;ol>
+&lt;li>&lt;a href="https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/">https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://pliutau.com/different-ways-to-block-go-runtime-forever/">https://pliutau.com/different-ways-to-block-go-runtime-forever/&lt;/a>&lt;/li>
+&lt;/ol>
+&lt;blockquote>
+&lt;p>NOTE: I run these with Golang 1.12&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="the-original">The original&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">1000&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="c1">// The main goroutine is exited before the show() be done.
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="bad---an-empty-infinite-loop">Bad - An empty infinite loop&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="p">(&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;time&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="c1">// Empty, just do nothing
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">5&lt;/span> &lt;span class="o">*&lt;/span> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nx">Second&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>An infinite loop here is a busy loop that does nothing except burn CPU time.&lt;/p></description></item></channel></rss>
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index d50c5ef..7565d69 100644
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@@ -1,5 +1,5 @@
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diff --git a/tags/openstack/index.xml b/tags/openstack/index.xml
index 6435646..90c03b3 100644
--- a/tags/openstack/index.xml
+++ b/tags/openstack/index.xml
@@ -1,3 +1,6 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Openstack on kiennt26's home</title><link>https://ntk148v.github.io/tags/openstack/</link><description>Recent content in Openstack on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/openstack/index.xml" rel="self" type="application/rss+xml"/><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Openstack on kiennt26's home</title><link>https://ntk148v.github.io/tags/openstack/</link><description>Recent content in Openstack on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/openstack/index.xml" rel="self" type="application/rss+xml"/><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/playground/index.html b/tags/playground/index.html
index 8e5cd6e..3650eab 100644
--- a/tags/playground/index.html
+++ b/tags/playground/index.html
@@ -1,5 +1,5 @@
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[@supports(backdrop-filter:blur(0))]:before:backdrop-blur-md"><div class="lowercase italic mx-auto flex w-full max-w-content items-center justify-between"><nav class=mr-3><ol class="flex text-md items-center"><li><a href=/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">kiennt26's home</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/ class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">Tags</a></li><li class="text-muted focus:underline focus:outline-none pr-1 whitespace-nowrap">/</li><li><a href=/tags/playground/ class="focus:underline focus:outline-none font-bold pr-1 hidden md:block">Playground</a></li></ol></nav><nav class=ml-3><ul class="flex text-md whitespace-nowrap"><li class=pl-2><a href=/contact class="tracking-wide hover:underline">Contact</a></li><li class=pl-2><a href=/posts class="tracking-wide 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diff --git a/tags/playground/index.xml b/tags/playground/index.xml
index 009bfa1..c50721e 100644
--- a/tags/playground/index.xml
+++ b/tags/playground/index.xml
@@ -1,2 +1,788 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Playground on kiennt26's home</title><link>https://ntk148v.github.io/tags/playground/</link><description>Recent content in Playground on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/playground/index.xml" rel="self" type="application/rss+xml"/><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>Hey, this is a simple post to play with GoAT Diagram.
-a W L A i a n p b d t o o w p s 1 B I n W t i e F r i n e t a L a S O p e S t b r o v X p e r 2 C A l o B u l d u e t B o o t h T a a i b O l S e t b 1 D · · · · · a U D A t b e a · · a # u d b n i · · · · a t c s # u a b · · · · · e t B e · · · d L S A e · N r · · v · · · e · · U r · · b · # u R · n a · · t c · # u k</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Playground on kiennt26's home</title><link>https://ntk148v.github.io/tags/playground/</link><description>Recent content in Playground on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/playground/index.xml" rel="self" type="application/rss+xml"/><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>&lt;p>Hey, this is a simple post to play with &lt;a href="https://github.com/blampe/goat">GoAT Diagram&lt;/a>.&lt;/p>
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diff --git a/tags/polybar/index.html b/tags/polybar/index.html
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\ No newline at end of file
diff --git a/tags/polybar/index.xml b/tags/polybar/index.xml
index 2fa9f9d..ccfbd03 100644
--- a/tags/polybar/index.xml
+++ b/tags/polybar/index.xml
@@ -1,2 +1,7 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Polybar on kiennt26's home</title><link>https://ntk148v.github.io/tags/polybar/</link><description>Recent content in Polybar on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/polybar/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Polybar on kiennt26's home</title><link>https://ntk148v.github.io/tags/polybar/</link><description>Recent content in Polybar on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/polybar/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/prometheus/index.html b/tags/prometheus/index.html
index ddb930c..7013a7b 100644
--- a/tags/prometheus/index.html
+++ b/tags/prometheus/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/prometheus/index.xml b/tags/prometheus/index.xml
index c027384..ee6ffed 100644
--- a/tags/prometheus/index.xml
+++ b/tags/prometheus/index.xml
@@ -1,5 +1,23 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Prometheus on kiennt26's home</title><link>https://ntk148v.github.io/tags/prometheus/</link><description>Recent content in Prometheus on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/prometheus/index.xml" rel="self" type="application/rss+xml"/><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>Ansitheus: Ansible + Prometheus Prometheus overview NOTE: Checkout the Prometheus official documentation.
-Prometheus is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.
-Features a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs PromQL, a flexible query language to leverage this dimensionality no reliance on distributed storage; single server nodes are autonomous time series collection happens via a pull model over HTTP pushing time series is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing &amp;amp; dashboarding support Architecture &amp;amp; components Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs.</description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Prometheus on kiennt26's home</title><link>https://ntk148v.github.io/tags/prometheus/</link><description>Recent content in Prometheus on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/prometheus/index.xml" rel="self" type="application/rss+xml"/><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">Ansitheus: Ansible + Prometheus
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="prometheus-overview">Prometheus overview&lt;/h2>
+&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Checkout the &lt;a href="https://prometheus.io/docs/introduction/overview/">Prometheus official documentation&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;p>&lt;a href="https://github.com/prometheus">Prometheus&lt;/a> is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.&lt;/p>
+&lt;h3 id="features">Features&lt;/h3>
+&lt;ul>
+&lt;li>a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs&lt;/li>
+&lt;li>PromQL, a flexible query language to leverage this dimensionality&lt;/li>
+&lt;li>no reliance on distributed storage; single server nodes are autonomous&lt;/li>
+&lt;li>time series collection happens via a pull model over HTTP&lt;/li>
+&lt;li>pushing time series is supported via an intermediary gateway&lt;/li>
+&lt;li>targets are discovered via service discovery or static configuration&lt;/li>
+&lt;li>multiple modes of graphing &amp;amp; dashboarding support&lt;/li>
+&lt;/ul>
+&lt;h3 id="architecture--components">Architecture &amp;amp; components&lt;/h3>
+&lt;p>Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. It stores all scraped samples locally &amp;amp; runs rules over this data to either aggregate &amp;amp; record new time series from existing data or generate alerts. Grafana or other API consumers can be used to visualize the collected data.&lt;/p></description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/ramblings/index.html b/tags/ramblings/index.html
index 183481a..9549a1a 100644
--- a/tags/ramblings/index.html
+++ b/tags/ramblings/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/ramblings/index.xml b/tags/ramblings/index.xml
index a42d89e..c843ea2 100644
--- a/tags/ramblings/index.xml
+++ b/tags/ramblings/index.xml
@@ -1,5 +1,14 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ramblings on kiennt26's home</title><link>https://ntk148v.github.io/tags/ramblings/</link><description>Recent content in Ramblings on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ramblings/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>A collection of interesting thoughts and opinions that I come across Willingness to look stupid Willingness to look stupidhttps://t.co/0WrVAzLQ6g pic.twitter.com/6NjysMwbch
-&amp;mdash; Dan Luu (@danluu) October 21, 2021 I recently read this article by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.
-People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:.</description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>Source: The Undefeated
-I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.
-Rest In Peace Mamba :basketball:</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Ramblings on kiennt26's home</title><link>https://ntk148v.github.io/tags/ramblings/</link><description>Recent content in Ramblings on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/ramblings/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ A collection of interesting thoughts and opinions that I come across
+&lt;/blockquote>
+
+&lt;h2 id="willingness-to-look-stupid">Willingness to look stupid&lt;/h2>
+&lt;div align="center">
+ &lt;blockquote class="twitter-tweet">&lt;p lang="en" dir="ltr">Willingness to look stupid&lt;a href="https://t.co/0WrVAzLQ6g">https://t.co/0WrVAzLQ6g&lt;/a> &lt;a href="https://t.co/6NjysMwbch">pic.twitter.com/6NjysMwbch&lt;/a>&lt;/p>&amp;mdash; Dan Luu (@danluu) &lt;a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021&lt;/a>&lt;/blockquote> &lt;script async src="https://platform.twitter.com/widgets.js" charset="utf-8">&lt;/script>
+&lt;/div>
+&lt;p>I recently read &lt;a href="https://danluu.com/look-stupid/">this article&lt;/a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.&lt;/p>
+&lt;p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:. I&amp;rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &amp;hellip;). And I know that I&amp;rsquo;m not the only one, look smart but being stupid.&lt;/p></description></item><item><title>Rest In Peace Kobe Bryant</title><link>https://ntk148v.github.io/posts/rip-kobe-bryant/</link><pubDate>Mon, 27 Jan 2020 22:15:07 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rip-kobe-bryant/</guid><description>&lt;p>&lt;img src="./theundefeated-kobe-bryant.pg" alt="">&lt;/p>
+&lt;p>Source: &lt;a href="https://theundefeated.com/features/kobe-vs-kobe-bryant-lakers-numbers-8-and-24-jersey-retirement/">The Undefeated&lt;/a>&lt;/p>
+&lt;p>I am not Kobe fan honestly but just like him, basketball is something I love. I hope he&amp;rsquo;s at peace because although his journey in life is over, the legacy he left behind is etched in all our souls.&lt;/p>
+&lt;p>Rest In Peace Mamba :basketball:&lt;/p>
+&lt;p>&lt;img src="./kobe.jpg" alt="">&lt;/p></description></item></channel></rss>
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+++ b/tags/rofi/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/rofi/index.xml b/tags/rofi/index.xml
index fd9bc2b..69dc473 100644
--- a/tags/rofi/index.xml
+++ b/tags/rofi/index.xml
@@ -1 +1,180 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Rofi on kiennt26's home</title><link>https://ntk148v.github.io/tags/rofi/</link><description>Recent content in Rofi on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/rofi/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Rofi on kiennt26's home</title><link>https://ntk148v.github.io/tags/rofi/</link><description>Recent content in Rofi on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/rofi/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/shell/index.html b/tags/shell/index.html
index f971cf7..365ffce 100644
--- a/tags/shell/index.html
+++ b/tags/shell/index.html
@@ -1,5 +1,5 @@
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\ No newline at end of file
diff --git a/tags/shell/index.xml b/tags/shell/index.xml
index 446f800..0ab5bb9 100644
--- a/tags/shell/index.xml
+++ b/tags/shell/index.xml
@@ -1,3 +1,10 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Shell on kiennt26's home</title><link>https://ntk148v.github.io/tags/shell/</link><description>Recent content in Shell on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/shell/index.xml" rel="self" type="application/rss+xml"/><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.
-Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:
-Commands must be on a single line. Arguments must be separated by whitespace. No quoting arguments or escaping whitespace. No piping or redirection. Before we start, make sure you have .</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Shell on kiennt26's home</title><link>https://ntk148v.github.io/tags/shell/</link><description>Recent content in Shell on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/shell/index.xml" rel="self" type="application/rss+xml"/><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>&lt;p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.&lt;/p>
+&lt;p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:&lt;/p>
+&lt;ul>
+&lt;li>Commands must be on a single line.&lt;/li>
+&lt;li>Arguments must be separated by whitespace.&lt;/li>
+&lt;li>No quoting arguments or escaping whitespace.&lt;/li>
+&lt;li>No piping or redirection.&lt;/li>
+&lt;/ul>
+&lt;blockquote>
+&lt;p>Before we start, make sure you have .NET Core environment and knownledge.&lt;/p></description></item></channel></rss>
\ No newline at end of file
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text-muted">2023/02/24&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/clumsy-docker-network-notes/ class=col-span-2>A clumsy Docker network notes</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/12/12&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/writing-a-simple-shell-in-c-sharp/ class=col-span-2>Writing a Simple Shell in C Sharp</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/recurse-center/ class=col-span-2>Recurse-Center</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/08/23&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/golang-async/ class=col-span-2>Golang Async</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/07/21&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/iptables/ class=col-span-2>Iptables</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/02/24&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-run-in-the-background/ class=col-span-2>Linux Run in the Background</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/03&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/testing-ansible-with-molecule/ class=col-span-2>Testing Ansible With Molecule</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/03/20&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goat-playground/ class=col-span-2>Goat Playground</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2023/01/31&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2022</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/ class=col-span-2>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/01/10&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/bgp-ecmp-load-balancing/ class=col-span-2>Bgp Ecmp Load Balancing</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/02/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/docker-iptables/ class=col-span-2>Docker and Iptables: You may do it wrong!</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/10/25&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/moving-from-utterances-to-giscus/ class=col-span-2>Moving from Utterances to Giscus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2022/08/30&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2021</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-tools-that-you-never-knew-you-needed/ class=col-span-2>Linux tools that you never knew you needed</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/07&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-1-i3/ class=col-span-2>Getting Started with Tiling WM [Part 1] - I3</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-2-rofi/ class=col-span-2>Getting Started with Tiling WM [Part 2] - Rofi</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-3-polybar/ class=col-span-2>Getting Started with Tiling WM [Part 3] - Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/goignore/ class=col-span-2>Goignore</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/11/26&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/set-animated-gif-as-wallpaper/ class=col-span-2>Set Animated Gif as Wallpaper</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/01/14&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class=col-span-2>Getting Started with Tiling WM [Part 4] - Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-5-compton/ class=col-span-2>Getting Started with Tiling WM [Part 5] - Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/rename-files-in-linux/ class=col-span-2>Rename Files in Linux</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/12/16&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2020</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/operate-etcd-cluster/ class=col-span-2>Operate Etcd cluster</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/04/28&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/ansitheus/ class=col-span-2>Ansitheus</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/05&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/linux-swap-space-note/ class=col-span-2>Swap space note</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2020/05/20&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2019</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/openstack-autoscaling-new-approach/ class=col-span-2>Openstack Autoscaling New Approach</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2019/08/19&nbsp;</time></div></div></div></div><div class=content><div class="text-2xl font-bold my-4 border-b border-dashed">2018</div><div class=flex-grow><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/lets-comment/ class=col-span-2>Lets Comment</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2018/10/02&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a href=https://ntk148v.github.io//index.xml><svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentcolor"><path stroke-linecap="round" stroke-linejoin="round" d="M12.75 19.5v-.75a7.5 7.5.0 00-7.5-7.5H4.5m0-6.75h.75c7.87.0 14.25 6.38 14.25 14.25v.75M6 18.75a.75.75.0 11-1.5.0.75.75.0 011.5.0z"/></svg></a></nav><span class="text-muted hidden md:block">&copy;
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diff --git a/tags/tech/index.xml b/tags/tech/index.xml
index d97b17a..1668cdb 100644
--- a/tags/tech/index.xml
+++ b/tags/tech/index.xml
@@ -1,57 +1,1693 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tech on kiennt26's home</title><link>https://ntk148v.github.io/tags/tech/</link><description>Recent content in Tech on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 19 Jul 2024 08:53:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tech/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>Source:
-https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/ https://www.digitalocean.com/community/tutorials/atop-command-in-linux https://www.atoptool.nl/index.php top is great, we&amp;rsquo;re all familiar with it. htop is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data.</description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>A clumsy Docker networking notes Nguồn:
-https://github.com/ntk148v/til/tree/master/docker/networking https://argus-sec.com/docker-networking-behind-the-scenes/ https://docs.docker.com/network/ https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md https://docs.docker.com/engine/tutorials/networkingcontainers/ https://docs.docker.com/network/iptables/ https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj Khái niệm Các khái niệm:
-Network namespace:
-Trước khi đi vào network namespace, cần hiểu về Namespace. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác).</description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>The following content is rendered from my #til github. Recurse Center Source: https://www.recurse.com/
-The retreat where curious programmers recharge and grow I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from Julia Evan&amp;rsquo;s blog.
-Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other.</description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.
-Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:
-Commands must be on a single line. Arguments must be separated by whitespace. No quoting arguments or escaping whitespace. No piping or redirection. Before we start, make sure you have .</description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>This article is Golang version of Asynchronous programming with async and await guideline. They did really good job to demonstrate how asynchronous programming looks like.
-You can find source code here.
-Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.
-1. Pour a cup of coffee. 2. Heat a pan, then fry two eggs. 3. Fry three slices of bacon. 4. Toast two pieces of bread. 5. Add butter and jam to the toast.</description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>The following content is rendered from my #til github. Testing Ansible with Molecule Source:
-https://molecule.readthedocs.io/en/latest/getting-started/ https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule Table of contents:
-Testing Ansible with Molecule 0. Problem 1. Introduction 2. Play with Molecule 2.1. Getting started 2.2. Custom Docker image 2.3. Test an existing role 2.4. Test Cluster 0. Problem You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:</description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>Environment: Ubuntu 22.04, but it should work in other Linux distributions.
-Source: https://www.sobyte.net/post/2023-03/linux-services-in-the-background/
-You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?
-graph TD A(You don't want to wait for a running command) --> B{Do you want to see output?} A --> C{Do you want the command to stay running after the session ends?</description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>The following content is from my #til github. Source
-https://github.com/leandromoreira/linux-network-performance-parameters/ https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/ https://blog.cloudflare.com/how-to-achieve-low-latency/ https://blog.cloudflare.com/how-to-receive-a-million-packets/ https://beej.us/guide/bgnet/html/ https://blog.csdn.net/armlinuxww/article/details/111930788 https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning Linux Networking stack Source:
-https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/
-https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/
-https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/
-https://juejin.cn/post/7106345054368694280
-https://openwrt.org/docs/guide-developer/networking/praxis
-https://blog.51cto.com/u_15169172/2710604
-https://sn0rt.github.io/media/paper/TCPlinux.pdf
-https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8
-The complete network data flow:
-It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets. Linux queue: NOTE: The follow sections will heavily use sysctl. If you don&amp;rsquo;t familiar with this command, take a look at HOWTO#sysctl section.</description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>Iptables Source:
-https://www.thegeekstuff.com/2011/01/iptables-fundamentals/
-https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html
-https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
-https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/ - advanced
-Iptables
-1. Introduction 2. Netfilter hooks 3. iptables tables and chains 4. iptables rules 5. iptables drawbacks 6. iptables TRACE 1. Introduction iptables is used to manage packet filtering and NAT rules. iptables works with the kernel netfilter packet filtering framework. iptables is replaced with nftables, but iptables syntax is still commonly used as a baseline. iptables on a high-level. iptables tables chains rules 2.</description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>Hey, this is a simple post to play with GoAT Diagram.
-a W L A i a n p b d t o o w p s 1 B I n W t i e F r i n e t a L a S O p e S t b r o v X p e r 2 C A l o B u l d u e t B o o t h T a a i b O l S e t b 1 D · · · · · a U D A t b e a · · a # u d b n i · · · · a t c s # u a b · · · · · e t B e · · · d L S A e · N r · · v · · · e · · U r · · b · # u R · n a · · t c · # u k</description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>Mission If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.
-Docker network Let&amp;rsquo;s start with a fact that Docker manipulates iptables rules to provide network isolation, on Linux. Docker installs custom iptables chains named DOCKER, DOCKER-USER and DOCKER-ISOLATION-STAGE-*, and it ensures that incoming packets are always checked by these chains first.
-iptables -L -n Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge.</description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>I&amp;rsquo;ve used Utterances for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - Giscus. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.
-So..
-Why migrate? Post reactions: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself.</description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>Introduction We will build a Load balancer with BGP and Equal-Cost Multipath routing (ECMP) using both Bird and ExaBGP.
-References:
-How to build a load balancer with BGP and ECMP using VyOS Multi-tier load balancer Load balancing without Load balancers Lab overview EVE-NG version 2.0.3-112 QEMU version 2.4.0 AS 65000: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router. ISPRouter and EdgeRouter are Fortinet Fortigate v7.</description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>According to Reddis post and i3-gaps issue, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer doesn&amp;rsquo;t like it. But nevermind, we still have two ways to achieve it.
-Rounded i3-gaps Resloved have an awesome fork to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it here.
-Install i3-gaps. # Dependencies sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.</description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>Rename a single file with mv. Just a basic thing. Rename multiple files with mv. # Rename files with suffix .yaml to yml for f in *.yaml; do mv -- &amp;#34;$f&amp;#34; &amp;#34;${f%.yaml}.yml&amp;#34; done Rename multiple files with rename. # Install rename command # Ubuntu/Debian-derived distros sudo apt install rename # RedHat-derived distros sudo yum install prename # The follow examples are performed in Ubuntu/Debian-derived distros rename &amp;#39;s/.yaml/.yml/&amp;#39; *.yaml # Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34; rename &amp;#39;s/prev_/next_&amp;#39; *.</description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>Goignore - A .gitignore wizard which gnerates .gitignore files from the command line for you. Inspired by joe Features No installation necessary - just use the binary. Works on Linux, Windows &amp;amp; MacOS. Interactive user interface with bubbletea: Pagination, Filtering, Help&amp;hellip; Supports all Github-supported .gitignore files. Install Download the latest binary from the Release page. It&amp;rsquo;s the easiest way to get started with goignore. Make sure to add the location of the binary to your $PATH.</description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description> WIP</description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>bat - (cat alternative) bat: A cat(1) clone with syntax highlighting and Git integration. Example: fd - (find alternative) fd: a simple, fast and user-friendly alternative to find. Examples: httpie - (wget/curl alternative) httpie: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more. Examples: # Hello world $ http httpie.io/hello # Custom HTTP method, HTTP headers and JSON data $ http PUT pie.</description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>NOTE: Environment Ubuntu 20.04
-Dependencies Xwinwrap: sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev git clone https://github.com/ujjwal96/xwinwrap.git cd xwinwrap make sudo make install make clean Gifsicle: sudo apt install gifsicle The helper script A helper script to setup animated .gif in dual monitors.
-#!/bin/bash # Uses xwinwrap to display given animated .gif in dual monitors. if [ $# -ne 1 ]; then echo 1&amp;gt;&amp;amp;2 Usage: $0 image.gif exit 1 fi gif=$1 killall -9 xwinwrap killall -9 gifview # Get monitors resolution SCR1=`xrandr | awk &amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;` SCR2=`xrandr | awk &amp;#39;!</description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>What is Swap? Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.
-Swap partition size Old rule of thumb swap: 2 * the-amount-of-RAM So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time.</description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>Ansitheus: Ansible + Prometheus Prometheus overview NOTE: Checkout the Prometheus official documentation.
-Prometheus is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.
-Features a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs PromQL, a flexible query language to leverage this dimensionality no reliance on distributed storage; single server nodes are autonomous time series collection happens via a pull model over HTTP pushing time series is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing &amp;amp; dashboarding support Architecture &amp;amp; components Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs.</description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>NOTE: This is my perspective aggregation. You can easily find these such of knowledges in the references.
-Context Etcd Version v3.4.0.
-Requirements Number of nodes &amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with n-members, quorum is (n/2)+1. CPUs Etcd doesn&amp;rsquo;t require a lot of CPU capacity. Typical clusters need 2-4 cores to run smoothly.</description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>NOTE(kiennt): There is a legacy Faythe guideline. The new version is coming soon, check its repository for status.
-This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.
-The standard OpenStack Autoscaling approach Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.</description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.
-That&amp;rsquo;s why I choose a Disqus alternative - Utterances. Utterances is a lightweight comments widget built on Github issues.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tech on kiennt26's home</title><link>https://ntk148v.github.io/tags/tech/</link><description>Recent content in Tech on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tech/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux Magic System Request Key Hacks</title><link>https://ntk148v.github.io/posts/linux-sysrq/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-sysrq/</guid><description>&lt;p>Source: &lt;a href="https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html">https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html&lt;/a>&lt;/p>
+&lt;h2 id="giới-thiệu">Giới thiệu&lt;/h2>
+&lt;p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &amp;ldquo;treo&amp;rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng &lt;strong>Magic System Request Key (SysRq)&lt;/strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?&lt;/p>
+&lt;p>SysRq là một tính năng của Linux, cho phép người dùng gửi &amp;ldquo;tín hiệu cầu cứu&amp;rdquo; trực tiếp đến kernel của hệ điều hành.&lt;/p></description></item><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop">https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop&lt;/a>&lt;/li>
+&lt;li>&lt;a href="http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/">http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.digitalocean.com/community/tutorials/atop-command-in-linux">https://www.digitalocean.com/community/tutorials/atop-command-in-linux&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.atoptool.nl/index.php">https://www.atoptool.nl/index.php&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>top&lt;/code> is great, we&amp;rsquo;re all familiar with it. &lt;code>htop&lt;/code> is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But &lt;a href="https://www.atoptool.nl/index.php">&lt;code>atop&lt;/code>&lt;/a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &amp;ndash; in real time or &lt;em>historically&lt;/em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.&lt;/p></description></item><item><title>A clumsy Docker network notes</title><link>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</link><pubDate>Tue, 12 Dec 2023 14:47:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/clumsy-docker-network-notes/</guid><description>&lt;h1 id="a-clumsy-docker-networking-notes">A clumsy Docker networking notes&lt;/h1>
+&lt;p>Nguồn:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ntk148v/til/tree/master/docker/networking">https://github.com/ntk148v/til/tree/master/docker/networking&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://argus-sec.com/docker-networking-behind-the-scenes/">https://argus-sec.com/docker-networking-behind-the-scenes/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/">https://docs.docker.com/network/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md">https://github.com/KamranAzeem/learn-docker/blob/master/docs/docker-networking-deep-dive.md&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/engine/tutorials/networkingcontainers/">https://docs.docker.com/engine/tutorials/networkingcontainers/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://docs.docker.com/network/iptables/">https://docs.docker.com/network/iptables/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj">https://dev.to/polarbit/how-docker-container-networking-works-mimic-it-using-linux-network-namespaces-9mj&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="khái-niệm">Khái niệm&lt;/h2>
+&lt;ul>
+&lt;li>
+&lt;p>Các khái niệm:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://man7.org/linux/man-pages/man8/ip-netns.8.html">Network namespace&lt;/a>:&lt;/p>
+&lt;ul>
+&lt;li>Trước khi đi vào network namespace, cần hiểu về &lt;strong>Namespace&lt;/strong>. Namespace là một tính năng của Linux kernel để phân vùng tài nguyên của kernel sao cho một tập hợp các process chỉ nhìn thấy tập hợp các tài nguyên (trong namespace đó) trong khi một tập hợp các process khác nhìn thấy tập các tài nguyên khác (trong namespace khác). Tính năng này hoạt động bằng cách đưa tập các tài nguyên và process vào cùng một namespace, các namespace khác nhau sẽ tham chiếu đến các tài nguyên riêng biệt. Tài nguyên có thể tồn tại trong nhiều không gian. Ví dụ về các tài nguyên như vậy là process ID, hostname, user ID, tên file và một số tên (name) liên quan đến quyền truy cập mạng và giao tiếp giữa các process.&lt;/li>
+&lt;li>Networking namespace là một trong các loại namespace. Mỗi network namespace có &lt;a href="https://en.wikipedia.org/wiki/Network_stack">network stack&lt;/a> riêng: địa chỉ IP, network interface, route table, &amp;hellip;&lt;/li>
+&lt;li>Bạn có thể xem thao tác các network namespace bằng câu lệnh sau:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">$ sudo ip netns &amp;lt;sub-command&amp;gt;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://wiki.archlinux.org/index.php/Network_bridge">Network bridge&lt;/a>: một thiết bị mạng ảo chuyển tiếp các gói giữa hai hoặc nhiều phân đoạn mạng.&lt;/p></description></item><item><title>Recurse-Center</title><link>https://ntk148v.github.io/posts/recurse-center/</link><pubDate>Wed, 23 Aug 2023 09:19:35 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/recurse-center/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/recurse-center/README.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="recurse-center">Recurse Center&lt;/h1>
+&lt;p>Source: &lt;a href="https://www.recurse.com/">https://www.recurse.com/&lt;/a>&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-text" data-lang="text">&lt;span class="line">&lt;span class="cl">The retreat where curious programmers recharge and grow
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>I&amp;rsquo;ve founded out about Recurse Center, formerly known as Hacker School, from &lt;a href="https://jvns.ca/blog/2017/09/17/how-i-spent-my-time-at-the-recurse-center/">Julia Evan&amp;rsquo;s blog&lt;/a>.&lt;/p>
+&lt;p>Recurse Center is a independent, community-driven learning and software development retreat located in New York City, United States. Recurse Center focuses on providing a free and open learning environment for programmers, aiming to create a platform where they can explore, develop, and interact with each other. You will spnd six or 12 weeks programming at the edge of your abilities alongside motivated peers - at no cost to you.&lt;/p></description></item><item><title>Writing a Simple Shell in C Sharp</title><link>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</link><pubDate>Sun, 20 Aug 2023 23:15:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/writing-a-simple-shell-in-c-sharp/</guid><description>&lt;p>In this post, we will write a minimalistic shell for UNIX(-like) operating systems in C# programming language. I create this for learning C# purpose.&lt;/p>
+&lt;p>Since its purpose demonstration (not feature completeness or even fitness for causual use), it has many limitations, including:&lt;/p>
+&lt;ul>
+&lt;li>Commands must be on a single line.&lt;/li>
+&lt;li>Arguments must be separated by whitespace.&lt;/li>
+&lt;li>No quoting arguments or escaping whitespace.&lt;/li>
+&lt;li>No piping or redirection.&lt;/li>
+&lt;/ul>
+&lt;blockquote>
+&lt;p>Before we start, make sure you have .NET Core environment and knownledge.&lt;/p></description></item><item><title>Golang Async</title><link>https://ntk148v.github.io/posts/golang-async/</link><pubDate>Fri, 21 Jul 2023 16:16:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-async/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>This article is Golang version of &lt;a href="https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/">Asynchronous programming with async and await guideline&lt;/a>. They did really good job to demonstrate how asynchronous programming looks like.&lt;/p>
+&lt;p>You can find source code &lt;a href="https://github.com/ntk148v/testing/tree/master/golang/breakfast">here&lt;/a>.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>Throughout this article, we&amp;rsquo;ll write the instructions to make a breakfast.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Pour a cup of coffee.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Heat a pan, then fry two eggs.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Fry three slices of bacon.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">4. Toast two pieces of bread.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">5. Add butter and jam to the toast.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">6. Pour a glass of orange juice.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Each step takes time to finish, for example, you have to wait X seconds to make a glass of orange juice. Let&amp;rsquo;s write those instructions as Golang:&lt;/p></description></item><item><title>Testing Ansible With Molecule</title><link>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</link><pubDate>Mon, 20 Mar 2023 14:41:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/testing-ansible-with-molecule/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is rendered from &lt;a href="https://github.com/ntk148v/til/blob/master/ansible/molecule.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;h1 id="testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://molecule.readthedocs.io/en/latest/getting-started/">https://molecule.readthedocs.io/en/latest/getting-started/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule">https://www.jeffgeerling.com/blog/2018/testing-your-ansible-roles-molecule&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>Table of contents:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#testing-ansible-with-molecule">Testing Ansible with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#0-problem">0. Problem&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-play-with-molecule">2. Play with Molecule&lt;/a>
+&lt;ul>
+&lt;li>&lt;a href="#21-getting-started">2.1. Getting started&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#22-custom-docker-image">2.2. Custom Docker image&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#23-test-an-existing-role">2.3. Test an existing role&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#24-test-cluster">2.4. Test Cluster&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="0-problem">0. Problem&lt;/h2>
+&lt;p>You wrote an Ansible playbook, good job, congratulations! Now you have to (should) check if the playbook works correctly. You may have multiple choices:&lt;/p></description></item><item><title>Linux Run in the Background</title><link>https://ntk148v.github.io/posts/linux-run-in-the-background/</link><pubDate>Fri, 03 Mar 2023 14:28:09 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-run-in-the-background/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;p>&lt;strong>Environment:&lt;/strong> Ubuntu 22.04, but it should work in other Linux distributions.&lt;/p>
+&lt;p>&lt;strong>Source&lt;/strong>: &lt;a href="https://www.sobyte.net/post/2023-03/linux-services-in-the-background/">https://www.sobyte.net/post/2023-03/linux-services-in-the-background/&lt;/a>&lt;/p>
+
+&lt;/blockquote>
+
+&lt;p>You run some commands, it may take a long time to execute, and you don&amp;rsquo;t want to wait for it. So what should you do in that scenario?&lt;/p>
+
+&lt;div class="mermaid" align="center">
+graph TD
+A(You don't want to wait &lt;br>for a running command) --> B{Do you want to see output?}
+A --> C{Do you want the command to stay &lt;br>running after the session ends?}
+C --> |Yes| E(screen)
+B --> |No| D(Ctrl-Z or &amp;)
+B --> |Yes| F{Do you have requirements &lt;br>for log cutting, running users?}
+F --> |No| G(nohup)
+F --> |Yes| H(supervisor or systemd)
+&lt;/div>
+
+&lt;h2 id="ctrl-z-or-">Ctrl-Z or &amp;amp;&lt;/h2>
+&lt;p>For example, you have to excute &lt;code>ping&lt;/code> command:&lt;/p></description></item><item><title>Linux Network Performance Ultimate Guide</title><link>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</link><pubDate>Fri, 24 Feb 2023 17:22:02 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-network-performance-ultimate-guide/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-gold">
+ The following content is from &lt;a href="https://github.com/ntk148v/til/blob/master/linux/network-performance-ultimate-guide.md">my #til github&lt;/a>.
+&lt;/blockquote>
+
+&lt;p>&lt;strong>Source&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/leandromoreira/linux-network-performance-parameters/">https://github.com/leandromoreira/linux-network-performance-parameters/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf">https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/">https://www.coverfire.com/articles/queueing-in-the-linux-network-stack/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-achieve-low-latency/">https://blog.cloudflare.com/how-to-achieve-low-latency/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/how-to-receive-a-million-packets/">https://blog.cloudflare.com/how-to-receive-a-million-packets/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://beej.us/guide/bgnet/html/">https://beej.us/guide/bgnet/html/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.csdn.net/armlinuxww/article/details/111930788">https://blog.csdn.net/armlinuxww/article/details/111930788&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning">https://www.ibm.com/docs/en/linux-on-systems?topic=recommendations-network-performance-tuning&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="linux-networking-stack">Linux Networking stack&lt;/h2>
+&lt;p>&lt;strong>Source:&lt;/strong>&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-receiving-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/">https://blog.packagecloud.io/monitoring-tuning-linux-networking-stack-sending-data/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/">https://www.sobyte.net/post/2022-10/linux-net-snd-rcv/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://juejin.cn/post/7106345054368694280">https://juejin.cn/post/7106345054368694280&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://openwrt.org/docs/guide-developer/networking/praxis">https://openwrt.org/docs/guide-developer/networking/praxis&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://blog.51cto.com/u_15169172/2710604">https://blog.51cto.com/u_15169172/2710604&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://sn0rt.github.io/media/paper/TCPlinux.pdf">https://sn0rt.github.io/media/paper/TCPlinux.pdf&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8">https://medium.com/coccoc-engineering-blog/linux-network-ring-buffers-cea7ead0b8e8&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>The complete network data flow:&lt;/p>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="http://web.archive.org/web/20170905131225if_/https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png" alt="">&lt;/p>
+&lt;ul>
+&lt;li>It&amp;rsquo;s a getting started. Before perform any tuning, let make sure that we understand how computers running Linux receive packets.&lt;/li>
+&lt;li>Linux queue:&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://github.com/leandromoreira/linux-network-performance-parameters/raw/master/img/linux_network_flow.png" alt="">&lt;/p>
+&lt;p>&lt;strong>NOTE&lt;/strong>: The follow sections will heavily use &lt;code>sysctl&lt;/code>. If you don&amp;rsquo;t familiar with this command, take a look at &lt;a href="#204-sysctl">HOWTO#sysctl section&lt;/a>.&lt;/p></description></item><item><title>Iptables</title><link>https://ntk148v.github.io/posts/iptables/</link><pubDate>Fri, 24 Feb 2023 17:19:31 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/iptables/</guid><description>&lt;h1 id="iptables">Iptables&lt;/h1>
+&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>
+&lt;p>&lt;a href="https://www.thegeekstuff.com/2011/01/iptables-fundamentals/">https://www.thegeekstuff.com/2011/01/iptables-fundamentals/&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html">https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture">https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture&lt;/a>&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/">https://www.sobyte.net/post/2022-04/understanding-netfilter-and-iptables/&lt;/a> - advanced&lt;/p>
+&lt;/li>
+&lt;li>
+&lt;p>&lt;a href="#iptables">Iptables&lt;/a>&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="#1-introduction">1. Introduction&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#2-netfilter-hooks">2. Netfilter hooks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#3-iptables-tables-and-chains">3. iptables tables and chains&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#4-iptables-rules">4. iptables rules&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#5-iptables-drawbacks">5. iptables drawbacks&lt;/a>&lt;/li>
+&lt;li>&lt;a href="#6-iptables-trace">6. iptables TRACE&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="1-introduction">1. Introduction&lt;/h2>
+&lt;ul>
+&lt;li>iptables is used to manage packet filtering and NAT rules.&lt;/li>
+&lt;li>iptables works with the kernel &lt;code>netfilter&lt;/code> packet filtering framework.
+&lt;ul>
+&lt;li>iptables is replaced with &lt;code>nftables&lt;/code>, but &lt;code>iptables&lt;/code> syntax is still commonly used as a baseline.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>iptables on a high-level.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tables
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> chains
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rules
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-netfilter-hooks">2. Netfilter hooks&lt;/h2>
+&lt;ul>
+&lt;li>There are 4 netfilter hooks that programs can register with. As packets progress through the stack, they will trigger the kernel modules that have registered with these hooks.
+&lt;ul>
+&lt;li>&lt;code>NF_IP_PRE_ROUTING&lt;/code>: triggered by any incoming traffic very soon after entering network stack. This hook is processed before any routing decisions have been made regarding where to send the packet.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_IN&lt;/code>: triggered after an incoming packet has been routed if the packet is destined for the local system.&lt;/li>
+&lt;li>&lt;code>NF_IP_FORWARD&lt;/code>: triggered after an incoming packet has been routed if the packet is to be forwarded to another host.&lt;/li>
+&lt;li>&lt;code>NF_IP_LOCAL_OUT&lt;/code>: triggered by any locally created outbound traffic as soon as it hits the network stack.&lt;/li>
+&lt;li>&lt;code>NF_IP_POST_ROUTING&lt;/code>: triggerd by any outgoing or forwarded traffic after routing has taken place and just before being sent out on the wire.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;p>&lt;img src="https://people.netfilter.org/pablo/nf-hooks.png" alt="">&lt;/p></description></item><item><title>Goat Playground</title><link>https://ntk148v.github.io/posts/goat-playground/</link><pubDate>Tue, 31 Jan 2023 14:15:12 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goat-playground/</guid><description>&lt;p>Hey, this is a simple post to play with &lt;a href="https://github.com/blampe/goat">GoAT Diagram&lt;/a>.&lt;/p>
+
+
+
+&lt;div class="goat svg-container ">
+ 
+ &lt;svg
+ xmlns="http://www.w3.org/2000/svg"
+ font-family="Menlo,Lucida Console,monospace"
+ 
+ viewBox="0 0 760 841"
+ >
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+&lt;text text-anchor='middle' x='712' y='388' fill='currentColor' style='font-size:1em'>c&lt;/text>
+&lt;text text-anchor='middle' x='712' y='788' fill='currentColor' style='font-size:1em'>·&lt;/text>
+&lt;text text-anchor='middle' x='720' y='292' fill='currentColor' style='font-size:1em'>#&lt;/text>
+&lt;text text-anchor='middle' x='720' y='340' fill='currentColor' style='font-size:1em'>u&lt;/text>
+&lt;text text-anchor='middle' x='720' y='388' fill='currentColor' style='font-size:1em'>k&lt;/text>
+&lt;/g>
+
+ &lt;/svg>
+ 
+&lt;/div></description></item><item><title>Docker and Iptables: You may do it wrong!</title><link>https://ntk148v.github.io/posts/docker-iptables/</link><pubDate>Tue, 25 Oct 2022 10:29:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/docker-iptables/</guid><description>&lt;h2 id="mission">Mission&lt;/h2>
+&lt;p>If you&amp;rsquo;re running Docker on a host that is exposed to the Internet (network bridge), you will probably want to restrict external access.&lt;/p>
+&lt;h2 id="docker-network">Docker network&lt;/h2>
+&lt;p>Let&amp;rsquo;s start with a fact that Docker manipulates &lt;code>iptables&lt;/code> rules to provide network isolation, on Linux. Docker installs custom iptables chains named &lt;code>DOCKER&lt;/code>, &lt;code>DOCKER-USER&lt;/code> and &lt;code>DOCKER-ISOLATION-STAGE-*&lt;/code>, and it ensures that incoming packets are always checked by these chains first.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-shell" data-lang="shell">&lt;span class="line">&lt;span class="cl">iptables -L -n
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Re.Docker network, I won&amp;rsquo;t describe here because it&amp;rsquo;s a lot of knowledge. You may want to check &lt;a href="https://github.com/ntk148v/til/blob/master/docker/networking/README.md">Docker network note&lt;/a>. I will only show iptables packet flow: For example, we have a host with ip 10.0.10.26, then start a container that is exposed port 8000 to internet.&lt;/p></description></item><item><title>Moving from Utterances to Giscus</title><link>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</link><pubDate>Tue, 30 Aug 2022 11:09:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/moving-from-utterances-to-giscus/</guid><description>&lt;p>I&amp;rsquo;ve used &lt;a href="./lets-comment.md">Utterances&lt;/a> for a while. Using Github&amp;rsquo;s issue feature as a backend for comments is a very elegant solution IM O: no tracking, no ads, simple. But today, I decide to switch to a better alternative - &lt;a href="https://github.com/giscus/giscus">Giscus&lt;/a>. Giscus is heavily inspired by Utterances except one thing: instead of using Github issues it uses the fairly new Discussions features to store comments.&lt;/p>
+&lt;p>So..&lt;/p>
+&lt;h2 id="why-migrate">Why migrate?&lt;/h2>
+&lt;ul>
+&lt;li>&lt;strong>Post reactions&lt;/strong>: utterances allows you to add reactions to comments but as an author I’m also interested in the general reception of the post itself. giscus provides this feature.&lt;/li>
+&lt;li>&lt;strong>Conversation view&lt;/strong>: utterances will simply render comments as a list in the order they have been created. Giscus groups replies to a comment instead. I mean comment is about discussion, right?&lt;/li>
+&lt;/ul>
+&lt;h2 id="prepare-your-site">Prepare your site&lt;/h2>
+&lt;ul>
+&lt;li>Migrate from utterances: &lt;a href="https://docs.github.com/en/discussions/managing-discussions-for-your-community/moderating-discussions#converting-an-issue-to-a-discussion">convert the existing issues into discussions&lt;/a>.&lt;/li>
+&lt;li>Follow &lt;a href="https://giscus.app/">Giscus&lt;/a>, it&amp;rsquo;s quite simple.&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>Leave a comment :point_down:&lt;/code>&lt;/p></description></item><item><title>Bgp Ecmp Load Balancing</title><link>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</link><pubDate>Mon, 07 Feb 2022 15:35:08 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/bgp-ecmp-load-balancing/</guid><description>&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;p>We will build a Load balancer with &lt;a href="https://en.wikipedia.org/wiki/Border_Gateway_Protocol">BGP&lt;/a> and &lt;a href="https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing">Equal-Cost Multipath routing (ECMP)&lt;/a> using both &lt;a href="https://bird.network.cz/">Bird&lt;/a> and &lt;a href="https://github.com/Exa-Networks/exabgp">ExaBGP&lt;/a>.&lt;/p>
+&lt;p>References:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d">How to build a load balancer with BGP and ECMP using VyOS&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://vincent.bernat.ch/en/blog/2018-multi-tier-loadbalancer#first-tier-ecmp-routing">Multi-tier load balancer&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/">Load balancing without Load balancers&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;h2 id="lab-overview">Lab overview&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://www.eve-ng.net/">EVE-NG&lt;/a> version 2.0.3-112&lt;/li>
+&lt;li>QEMU version 2.4.0&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/bgp-ecmp-load-balancing/ecmp-bgp.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>&lt;code>AS 65000&lt;/code>: internet service provider. In this post, we will build a BGP session between EdgeRouter and ISP router.&lt;/li>
+&lt;li>&lt;code>ISPRouter&lt;/code> and &lt;code>EdgeRouter&lt;/code> are &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortinet Fortigate v7.0.3&lt;/a> instances. You can use other routers as well.&lt;/li>
+&lt;li>&lt;code>Switch&lt;/code> is a Cisco switch.&lt;/li>
+&lt;li>&lt;code>client&lt;/code>, &lt;code>lb1&lt;/code>, and &lt;code>lb2&lt;/code> are Ubuntu server 18.04 instances. &lt;code>lb1&lt;/code> and &lt;code>lb2&lt;/code> will be in the &lt;code>10.12.12.0/24&lt;/code> private LAN, we will install nginx (LB L7) on these. Both servers will announce the same public IP (10.13.13.1) to &lt;code>EdgeRouter&lt;/code> using BGP. Incoming traffic from internet to this public IP will be routed to &lt;code>lb1&lt;/code> or &lt;code>lb2&lt;/code> depending of a hash.&lt;/li>
+&lt;li>You need to download and install device virtual images. Follow &lt;a href="https://www.eve-ng.net/index.php/documentation/howtos/howto-add-fortinet-images/">EVE-NG guide&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="configure">Configure&lt;/h2>
+&lt;h3 id="isprouter">ISPRouter&lt;/h3>
+&lt;p>Follow the &lt;a href="https://docs.fortinet.com/document/fortigate/7.0.3">Fortigate document&lt;/a> for the basic commands.&lt;/p></description></item><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>&lt;p>According to &lt;a href="https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/">Reddis post&lt;/a> and &lt;a href="https://github.com/Airblader/i3/issues/167">i3-gaps issue&lt;/a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-328562433">doesn&amp;rsquo;t like it&lt;/a>. But nevermind, we still have two ways to achieve it.&lt;/p>
+&lt;h2 id="rounded-i3-gaps">Rounded i3-gaps&lt;/h2>
+&lt;p>&lt;a href="https://github.com/resloved">Resloved&lt;/a> have an awesome &lt;a href="https://github.com/resloved/i3">fork&lt;/a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it &lt;a href="https://github.com/ntk148v/i3">here&lt;/a>.&lt;/p>
+&lt;ul>
+&lt;li>Install i3-gaps.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Dependencies&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-util0-dev libxcb-icccm4-dev libyajl-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libstartup-notification0-dev libxcb-randr0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libev-dev libxcb-cursor-dev libxcb-xinerama0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> autoconf libxcb-xrm0 libxcb-xrm-dev automake i3status &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> ninja-build meson libxcb-shape0-dev build-essential -y
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ntk148v/i3.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> i3/
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Compile&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mkdir -p build &lt;span class="o">&amp;amp;&amp;amp;&lt;/span> &lt;span class="nb">cd&lt;/span> build
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">meson ..
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">ninja
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo ninja install
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Configure rounded corners by adding this to your config.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">border_radius 10
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result, but you can see that these corners look so jagged (check out this &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-485263770">comment&lt;/a>).&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-1.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-4.png">
+&lt;/figure>
+
+&lt;h2 id="picom">picom&lt;/h2>
+&lt;ul>
+&lt;li>You can also achieve rounded corners by using &lt;a href="https://github.com/yshui/picom">picom&lt;/a>.&lt;/li>
+&lt;li>Install picom.&lt;/li>
+&lt;li>Configure rounded corners by changing &lt;code>corner_radius&lt;/code> value.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl"># Path ~/.config/picom.conf
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">corner_radius: 10;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result looks much smoother.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-2.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-3.png">
+&lt;/figure></description></item><item><title>Rename Files in Linux</title><link>https://ntk148v.github.io/posts/rename-files-in-linux/</link><pubDate>Thu, 16 Dec 2021 10:22:05 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/rename-files-in-linux/</guid><description>&lt;ul>
+&lt;li>Rename a single file with &lt;code>mv&lt;/code>. Just a basic thing.&lt;/li>
+&lt;li>Rename multiple files with &lt;code>mv&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Rename files with suffix .yaml to yml&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">for&lt;/span> f in *.yaml&lt;span class="p">;&lt;/span> &lt;span class="k">do&lt;/span> mv -- &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="nv">$f&lt;/span>&lt;span class="s2">&amp;#34;&lt;/span> &lt;span class="s2">&amp;#34;&lt;/span>&lt;span class="si">${&lt;/span>&lt;span class="nv">f&lt;/span>&lt;span class="p">%.yaml&lt;/span>&lt;span class="si">}&lt;/span>&lt;span class="s2">.yml&amp;#34;&lt;/span> &lt;span class="k">done&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Rename multiple files with &lt;code>rename&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Install rename command&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install rename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># RedHat-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo yum install prename
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># The follow examples are performed in Ubuntu/Debian-derived distros&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/.yaml/.yml/&amp;#39;&lt;/span> *.yaml
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;prev_&amp;#34; with &amp;#34;next_&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/prev_/next_&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Delete part of a filename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/next_//&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Limit changes to specific parts of filenames&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Only change the files that start with &amp;#34;paramater&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/^param/parameter/&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Search with grouping&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Replace all occurrences of &amp;#34;string&amp;#34; and &amp;#34;strong&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;s/(str|stro)ng/strength&amp;#39;&lt;/span> *.c
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Use translations with rename&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Force filenames to uppercase&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">rename &lt;span class="s1">&amp;#39;y/a-z/A-Z&amp;#39;&lt;/span> *.py
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># More?&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">man rename
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Goignore</title><link>https://ntk148v.github.io/posts/goignore/</link><pubDate>Fri, 26 Nov 2021 17:26:44 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/goignore/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;a href="https://github.com/ntk148v/goignore">Goignore&lt;/a> - A &lt;code>.gitignore&lt;/code> wizard which gnerates &lt;code>.gitignore&lt;/code> files from the command line for you. Inspired by &lt;a href="https://github.com/karan/joe">joe&lt;/a>
+&lt;/blockquote>
+
+&lt;h2 id="features">Features&lt;/h2>
+&lt;ul>
+&lt;li>No installation necessary - just use the binary.&lt;/li>
+&lt;li>Works on Linux, Windows &amp;amp; MacOS.&lt;/li>
+&lt;li>Interactive user interface with &lt;a href="https://github.com/charmbracelet/bubbletea">bubbletea&lt;/a>: Pagination, Filtering, Help&amp;hellip;&lt;/li>
+&lt;li>Supports all Github-supported &lt;a href="https://github.com/github/gitignore.git">.gitignore files&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="install">Install&lt;/h2>
+&lt;ul>
+&lt;li>Download the latest binary from the &lt;a href="https://github.com/ntk148v/goignore/releases">Release page&lt;/a>. It&amp;rsquo;s the easiest way to get started with &lt;code>goignore&lt;/code>.&lt;/li>
+&lt;li>Make sure to add the location of the binary to your &lt;code>$PATH&lt;/code>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="usage">Usage&lt;/h2>
+&lt;ul>
+&lt;li>Just run.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">chmod a+x goignore
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">goignore
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>
+&lt;p>At the first time, &lt;code>goignore&lt;/code> will download the Gitignore templates from Github. It may take a few seconds (depend on your network).&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>&lt;h2 id="bat---cat-alternative">bat - (cat alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/bat">bat&lt;/a>: A cat(1) clone with syntax highlighting and Git integration.&lt;/li>
+&lt;li>Example:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/bat.png">
+&lt;/figure>
+
+&lt;h2 id="fd---find-alternative">fd - (find alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/fd">fd&lt;/a>: a simple, fast and user-friendly alternative to &lt;code>find&lt;/code>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg">
+&lt;/figure>
+
+&lt;h2 id="httpie---wgetcurl-alternative">httpie - (wget/curl alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://httpie.io">httpie&lt;/a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Hello world&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http httpie.io/hello
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Custom HTTP method, HTTP headers and JSON data&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http PUT pie.dev/put X-API-Token:123 &lt;span class="nv">name&lt;/span>&lt;span class="o">=&lt;/span>John
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Submitting forms&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http -f POST pie.dev/post &lt;span class="nv">hello&lt;/span>&lt;span class="o">=&lt;/span>World
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Upload a file using redirect input&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http pie.dev/post &amp;lt; files/data.json
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://httpie.io&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="ripgrep---grep-alternative">ripgrep - (grep alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep">ripgrep&lt;/a>: a faster &lt;code>grep&lt;/code>. ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.&lt;/li>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep#quick-examples-comparing-tools">Benchmark&lt;/a>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Basic use&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg fast README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Regular expressions&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fast\w+&amp;#39;&lt;/span> README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Recursive search - recursively searching the directory (current directory is default)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fn write\(&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="delta">delta&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/dandavison/delta">delta&lt;/a>: Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.&lt;/li>
+&lt;li>Diff/git diff doesn&amp;rsquo;t show you exactly what was changed.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/git-diff.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Delta shows within-line highlights based on a Levenshtein edit inference algorithm.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/delta.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>By default, delta restructures the git output slightly to make the hunk markers human-readable:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://user-images.githubusercontent.com/52205/81059276-254cf980-8e9e-11ea-95c3-8b757a4c11b5.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Example config:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>core&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> pager: delta
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>delta&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> plus-style: &lt;span class="s2">&amp;#34;syntax #98c379&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> minus-style: &lt;span class="s2">&amp;#34;syntax #e06c75&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> syntax-theme: OneHalfDark
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> navigate: &lt;span class="nb">true&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> features: line-numbers decorations
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>interactive&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> diffFilter: delta --color-only
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Completely replace &lt;code>diff&lt;/code> with &lt;code>delta&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">diff&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;delta&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="z">z&lt;/h2>
+&lt;ul>
+&lt;li>Tired for &lt;code>cd&lt;/code>ing into the same directories over and over? Save your time with &lt;code>z&lt;/code> command!&lt;/li>
+&lt;li>&lt;a href="https://github.com/rupa/z">z&lt;/a>: jump around. Z is a shell script that makes jumping around your file directory pleasantly simple. Instead of trying to remember the exact path of where you need to go, or worse, &lt;code>cd&lt;/code>ing into the next directory followed by &lt;code>ls&lt;/code>ing and then cding again over and over (we’ve all been there), Z allows you to “lazy type” where you want to go and it’ll handle the rest.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Takes me to my workspace folder from anywhere.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ z workspace
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="fzf">fzf&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/junegunn/fzf">fzf&lt;/a>: fzf is a general-purpose command-line fuzzy finder.&lt;/li>
+&lt;li>It&amp;rsquo;s an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Read the list from STDIN and write the selected item to STDOUT&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ find * -type f &lt;span class="p">|&lt;/span> fzf &amp;gt; selected
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim &lt;span class="k">$(&lt;/span>fzf&lt;span class="k">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># COMMAND **&amp;lt;TAB&amp;gt;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under the current directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># - You can select multiple items with TAB key&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under your home directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ~/**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under current directory (single-selection)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under ~/github that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> ~/github/fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Can select multiple processes with &amp;lt;TAB&amp;gt; or &amp;lt;Shift-TAB&amp;gt; keys&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">kill&lt;/span> -9 &amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unset&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">export&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unalias&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/junegunn/fzf&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-vim.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-cd.png">
+&lt;/figure>
+
+&lt;h2 id="thefuck">thefuck&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/nvbn/thefuck">thefuck&lt;/a>: Magnificent app which corrects your previous console command.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ apt-get install vim
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Could not open lock file /var/lib/dpkg/lock - open &lt;span class="o">(&lt;/span>13: Permission denied&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Unable to lock the administration directory &lt;span class="o">(&lt;/span>/var/lib/dpkg/&lt;span class="o">)&lt;/span>, are you root?
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ fuck
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt-get install vim &lt;span class="o">[&lt;/span>enter/↑/↓/ctrl+c&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">Reading package lists... Done
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">...
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://github.com/nvbn/thefuck&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="exa---ls-alternative">exa - (ls alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://the.exa.website">exa&lt;/a>: A modern replacement for ls. &lt;code>exa&lt;/code> is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Completely replace &lt;code>ls&lt;/code> with &lt;code>exa&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">ls&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;exa&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa-ls.png">
+&lt;/figure></description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Environment Ubuntu 20.04&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="dependencies">Dependencies&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ujjwal96/xwinwrap">Xwinwrap&lt;/a>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ujjwal96/xwinwrap.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo make install
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make clean
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Gifsicle:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install gifsicle
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="the-helper-script">The helper script&lt;/h2>
+&lt;p>A helper script to setup animated .gif in dual monitors.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="cp">#!/bin/bash
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="cp">&lt;/span>&lt;span class="c1"># Uses xwinwrap to display given animated .gif in dual monitors.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">if&lt;/span> &lt;span class="o">[&lt;/span> &lt;span class="nv">$#&lt;/span> -ne &lt;span class="m">1&lt;/span> &lt;span class="o">]&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="k">then&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">echo&lt;/span> 1&amp;gt;&lt;span class="p">&amp;amp;&lt;/span>&lt;span class="m">2&lt;/span> Usage: &lt;span class="nv">$0&lt;/span> image.gif
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">exit&lt;/span> &lt;span class="m">1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">fi&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">gif&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nv">$1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 gifview
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Get monitors resolution&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR1&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR2&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;!/primary/ &amp;amp;&amp;amp; /connected/ { print $3 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR1&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR2&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>If you want to run xwinwrap by yourself, here is the example:&lt;/p></description></item><item><title>Swap space note</title><link>https://ntk148v.github.io/posts/linux-swap-space-note/</link><pubDate>Wed, 20 May 2020 09:30:28 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-swap-space-note/</guid><description>&lt;h2 id="what-is-swap">What is Swap?&lt;/h2>
+&lt;p>Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.&lt;/p>
+&lt;h2 id="swap-partition-size">Swap partition size&lt;/h2>
+&lt;h3 id="old-rule-of-thumb">Old rule of thumb&lt;/h3>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">swap: 2 * the-amount-of-RAM
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>So if a computer had 64KB of RAM, a swap partition of 128KB would be an optimum size. This rule took into the facts that RAM sizes were typically quite small at the time. Nowadays, RAM has become a &lt;code>cheap&lt;/code> &amp;amp; &lt;code>affordable&lt;/code> commondity, so the 2x rule is outdated.&lt;/p></description></item><item><title>Ansitheus</title><link>https://ntk148v.github.io/posts/ansitheus/</link><pubDate>Tue, 05 May 2020 13:51:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/ansitheus/</guid><description>&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">Ansitheus: Ansible + Prometheus
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="prometheus-overview">Prometheus overview&lt;/h2>
+&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Checkout the &lt;a href="https://prometheus.io/docs/introduction/overview/">Prometheus official documentation&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;p>&lt;a href="https://github.com/prometheus">Prometheus&lt;/a> is an open-source systems monitoring &amp;amp; alerting toolkit originally built at SoundCloud.&lt;/p>
+&lt;h3 id="features">Features&lt;/h3>
+&lt;ul>
+&lt;li>a multi-dimensional data model with time series data identified by metric name &amp;amp; key/value pairs&lt;/li>
+&lt;li>PromQL, a flexible query language to leverage this dimensionality&lt;/li>
+&lt;li>no reliance on distributed storage; single server nodes are autonomous&lt;/li>
+&lt;li>time series collection happens via a pull model over HTTP&lt;/li>
+&lt;li>pushing time series is supported via an intermediary gateway&lt;/li>
+&lt;li>targets are discovered via service discovery or static configuration&lt;/li>
+&lt;li>multiple modes of graphing &amp;amp; dashboarding support&lt;/li>
+&lt;/ul>
+&lt;h3 id="architecture--components">Architecture &amp;amp; components&lt;/h3>
+&lt;p>Prometheus scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. It stores all scraped samples locally &amp;amp; runs rules over this data to either aggregate &amp;amp; record new time series from existing data or generate alerts. Grafana or other API consumers can be used to visualize the collected data.&lt;/p></description></item><item><title>Operate Etcd cluster</title><link>https://ntk148v.github.io/posts/operate-etcd-cluster/</link><pubDate>Tue, 28 Apr 2020 11:24:04 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/operate-etcd-cluster/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: This is my perspective aggregation. You can easily find these such of knowledges in &lt;a href="#5-references">the references&lt;/a>.&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="context">Context&lt;/h2>
+&lt;p>Etcd Version &lt;code>v3.4.0&lt;/code>.&lt;/p>
+&lt;h2 id="requirements">Requirements&lt;/h2>
+&lt;h3 id="number-of-nodes">Number of nodes&lt;/h3>
+&lt;ul>
+&lt;li>&amp;gt;= 3 nodes. A etcd cluster needs a majority of nodes, a quorum to agree on updates to the cluster state. For a cluster with &lt;strong>n-members&lt;/strong>, quorum is &lt;strong>(n/2)+1&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;h3 id="cpus">CPUs&lt;/h3>
+&lt;ul>
+&lt;li>Etcd doesn&amp;rsquo;t require a lot of CPU capacity.&lt;/li>
+&lt;li>Typical clusters need &lt;strong>2-4 cores&lt;/strong> to run smoothly.&lt;/li>
+&lt;/ul>
+&lt;h3 id="memory">Memory&lt;/h3>
+&lt;ul>
+&lt;li>Etcd performance depends on having enough memory (cache key-value data, tracking watchers&amp;hellip;).&lt;/li>
+&lt;li>Typical &lt;strong>8GB&lt;/strong> is enough.&lt;/li>
+&lt;/ul>
+&lt;h3 id="disk">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd cluster is very sensitive to disk latencies. Since etcd must persist proposals to its log, disk activity from other processes may cause long &lt;code>fsync&lt;/code> latencies. The upshot is etcd may miss heartbeats, causing request timeouts and temporary leader loss. An etcd server can sometimes stably run alongside these processes when given a high disk priority.&lt;/li>
+&lt;li>Check whether a disk is fast enough for etcd using &lt;a href="https://github.com/axboe/fio">fio&lt;/a>. If the 99th percentile of fdatasync is &lt;strong>&amp;lt;10ms&lt;/strong>, your storage is ok.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ fio --rw&lt;span class="o">=&lt;/span>write --ioengine&lt;span class="o">=&lt;/span>sync --fdatasync&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --directory&lt;span class="o">=&lt;/span>test-data &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> --size&lt;span class="o">=&lt;/span>22m --bs&lt;span class="o">=&lt;/span>&lt;span class="m">2300&lt;/span> --name&lt;span class="o">=&lt;/span>mytest
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>&lt;strong>SSD&lt;/strong> is recommended.&lt;/li>
+&lt;/ul>
+&lt;h3 id="network">Network&lt;/h3>
+&lt;ul>
+&lt;li>Etcd cluster should be deployed in a fast and reliable network. Low latency ensures etcd members can communicate fast. High bandwidth can reduce the time to recover a failed etcd member.&lt;/li>
+&lt;li>&lt;strong>1GbE&lt;/strong> is sufficient for common etcd.&lt;/li>
+&lt;li>Note that the network isn&amp;rsquo;t the only source of latency. Each request and response may be impacted by slow disks on both the leader and followers.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tuning">Tuning&lt;/h2>
+&lt;h3 id="time-parameters">Time parameters&lt;/h3>
+&lt;ul>
+&lt;li>&lt;code>Heartbeat interval&lt;/code>.
+&lt;ul>
+&lt;li>The frequency with which the leader will notify followers that it is still the leader.&lt;/li>
+&lt;li>Default: &lt;strong>100ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>Around 0.5-1.5 x round-trip time (RTT) between members&lt;/strong>. Measure RTT with &lt;code>ping&lt;/code>.&lt;/li>
+&lt;li>Tradeoff: Too low -&amp;gt; etcd will send unnecessary messages -&amp;gt; increase the usage of CPU and network resources. Too high -&amp;gt; leads to high election timeout.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>&lt;code>Election timeout&lt;/code>.
+&lt;ul>
+&lt;li>How long a follower node will go without hearing a heartbeat before attempting to become leader itself.&lt;/li>
+&lt;li>Default: &lt;strong>1000ms&lt;/strong>.&lt;/li>
+&lt;li>Best practice: &lt;strong>&amp;gt;= 10 x RTT and &amp;lt; 50s&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>The heartbeat interval and election timeout value should be &lt;strong>the same for all members in one cluster&lt;/strong>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --heartbeat-interval&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> --election-timeout&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_HEARTBEAT_INTERVAL&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">100&lt;/span> &lt;span class="nv">ETCD_ELECTION_TIMEOUT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">500&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="disk-1">Disk&lt;/h3>
+&lt;ul>
+&lt;li>An etcd server can sometimes stably run alongside these processes when given a high disk priority using &lt;a href="https://linux.die.net/man/1/ionice">ionice&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># best effort, highest priority&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ sudo ionice -c2 -n0 -p &lt;span class="sb">`&lt;/span>pgrep etcd&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="snapshot">Snapshot&lt;/h3>
+&lt;ul>
+&lt;li>etcd appends all key changes to a log file -&amp;gt; huge log that grows forever :point_up:&lt;/li>
+&lt;li>Solution: Make periodic snapshots (save the current and remove old logs).&lt;/li>
+&lt;li>Default: make snapshots after every &lt;strong>10 000 changes&lt;/strong>.&lt;/li>
+&lt;li>Tuning: Just in case that etcd&amp;rsquo;s memory and disk usage is too high, lower threshold.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Command line arguments:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --snapshot-count&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Environment variables:&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nv">ETCD_SNAPSHOT_COUNT&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">5000&lt;/span> etcd
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="maintenance">Maintenance&lt;/h2>
+&lt;h3 id="history-compaction">History compaction&lt;/h3>
+&lt;ul>
+&lt;li>Etcd keeps an exact history of its keyspace, the history should be periodically compacted to avoid performance degradation and eventual storage space exhaustion.&lt;/li>
+&lt;li>Etcd can be set to automatically compact the keyspace with the &lt;code>--auto-compaction-*&lt;/code> option with a period of hours.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># keep one hour of history&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ etcd --auto-compaction-retention&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span> --auto-compaction-mode&lt;span class="o">=&lt;/span>periodic
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Compaction modes:
+&lt;ul>
+&lt;li>Revision-based: &lt;code>--auto-compaction-mode=revision --auto-compaction-retention=1000&lt;/code> automatically Compact on &amp;ldquo;latest revision&amp;rdquo; - 1000 every 5-minute (when latest revision is 30000, compact on revision 29000). Use this when having a large keyspace.&lt;/li>
+&lt;li>Periodic: &lt;code>--auto-compaction-mode=periodic --auto-compaction-retention=72h&lt;/code> automatically Compact with 72-hour retention window every 1-hour. Use this when having a huge number of revisions for a key-value pair.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h3 id="defragmentation">Defragmentation&lt;/h3>
+&lt;ul>
+&lt;li>Compacting old revisions internally fragments etcd by leaving gaps in backend database - &lt;code>internal fragmentation&lt;/code>.&lt;/li>
+&lt;li>Internal fragmentation space is available for use by etcd but unavailable to the host filesystem.&lt;/li>
+&lt;li>Solution: Release this space back to the filesystem with defrag.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ etcdctl defrag
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>It should be run rather infrequently, as there is always going to be an unavoidable pause.&lt;/li>
+&lt;/ul>
+&lt;h2 id="references">References&lt;/h2>
+&lt;ul>
+&lt;li>Etcd hardware: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md">https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md&lt;/a>&lt;/li>
+&lt;li>Etcd tuning: &lt;a href="https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md">https://github.com/etcd-io/etcd/blob/master/Documentation/tuning.md&lt;/a>&lt;/li>
+&lt;li>Etcd maintainence: &lt;a href="https://etcd.io/docs/v3.4.0/op-guide/maintenance/">https://etcd.io/docs/v3.4.0/op-guide/maintenance/&lt;/a>&lt;/li>
+&lt;/ul></description></item><item><title>Openstack Autoscaling New Approach</title><link>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</link><pubDate>Mon, 19 Aug 2019 21:19:38 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/openstack-autoscaling-new-approach/</guid><description>&lt;blockquote>
+&lt;p>NOTE(kiennt): There is a &lt;a href="https://github.com/vCloud-DFTBA/faythe/blob/legacy/docs/autoscaling.md">legacy Faythe guideline&lt;/a>. The new version is coming soon, check &lt;a href="https://github.com/vCloud-DFTBA/faythe">its repository&lt;/a> for status.&lt;/p>
+&lt;/blockquote>
+&lt;p>This guide describes how to automatically scale out your Compute instances in response to heavy system usage. By combining with Prometheus pre-defined rules that consider factors such as CPU or memory usage, you can configure OpenStack Orchestration (Heat) to add and remove additional instances automatically, when they are needed.&lt;/p>
+&lt;h2 id="the-standard-openstack-autoscaling-approach">The standard OpenStack Autoscaling approach&lt;/h2>
+&lt;p>Let&amp;rsquo;s talk about the standard OpenStack Autoscaling approach before goes to the new approach.&lt;/p></description></item><item><title>Lets Comment</title><link>https://ntk148v.github.io/posts/lets-comment/</link><pubDate>Tue, 02 Oct 2018 09:47:11 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/lets-comment/</guid><description>&lt;p>Hugo ships with support for Disqus, a third-party service that provides comment and community capabilities to websites via JavaScript. But Disqus generates a shit load of page requests and heavy contents&amp;hellip; which even with the benefits that come with having Disqus in place. People just want something that can be used to post a comment, that is.&lt;/p>
+&lt;p>That&amp;rsquo;s why I choose a Disqus alternative - &lt;a href="https://utteranc.es/">Utterances&lt;/a>. Utterances is a lightweight comments widget built on Github issues. Use Github issues for blog comments, wiki pages and more!&lt;/p></description></item></channel></rss>
\ No newline at end of file
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diff --git a/tags/techniques/index.xml b/tags/techniques/index.xml
index 68f41bb..49f4306 100644
--- a/tags/techniques/index.xml
+++ b/tags/techniques/index.xml
@@ -1,5 +1,16 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Techniques on kiennt26's home</title><link>https://ntk148v.github.io/tags/techniques/</link><description>Recent content in Techniques on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/techniques/index.xml" rel="self" type="application/rss+xml"/><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>via GIPHY
-Haven't thought of anything, have you? No, neither have I. Think, think, think
-The Feynman Algorithm The Feynman algorithm was facetiously suggested by Murray Gell-Mann, a colleague of Richard Feynman, in a New York Times interview.
-It is the combination of three steps:
-1. Write down the problem. 2. Think real hard. 3. Write down the solution. Polya&amp;rsquo;s Principles If you can&amp;#39;t solve a problem, then there is an easier problem you can solve: find it.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Techniques on kiennt26's home</title><link>https://ntk148v.github.io/tags/techniques/</link><description>Recent content in Techniques on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/techniques/index.xml" rel="self" type="application/rss+xml"/><item><title>Problem Solving Techniques</title><link>https://ntk148v.github.io/posts/problem-solving-techniques/</link><pubDate>Wed, 18 Jan 2023 15:18:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/problem-solving-techniques/</guid><description>&lt;div align="center">
+ &lt;iframe src="https://giphy.com/embed/777Aby0ZetYE8" width="480" height="259" frameBorder="0" class="giphy-embed" allowFullScreen>&lt;/iframe>&lt;p>&lt;a href="https://giphy.com/gifs/cute-think-pooh-777Aby0ZetYE8">via GIPHY&lt;/a>&lt;/p>
+ &lt;p>Haven't thought of anything, have you? No, neither have I. Think, think, think&lt;/p>
+&lt;/div>
+&lt;h2 id="the-feynman-algorithm">The Feynman Algorithm&lt;/h2>
+&lt;p>The &lt;a href="http://wiki.c2.com/?FeynmanAlgorithm">Feynman algorithm&lt;/a> was facetiously suggested by &lt;a href="http://en.wikipedia.org/wiki/Murray_Gell-Mann">Murray Gell-Mann&lt;/a>, a colleague of &lt;a href="https://en.wikipedia.org/wiki/Richard_Feynman">Richard Feynman&lt;/a>, in a New York Times interview.&lt;/p>
+&lt;p>It is the combination of three steps:&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">1. Write down the problem.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">2. Think real hard.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">3. Write down the solution.
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="polyas-principles">Polya&amp;rsquo;s Principles&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">If you can&amp;#39;t solve a problem, then there is an easier problem you can
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">solve: find it.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">-- George Poyla --
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>George Polya described in his 1957 book &lt;a href="https://en.wikipedia.org/wiki/How_to_Solve_It">How to Solve It&lt;/a> (HowToSolveIt) a set of heuristics for solving problems. A basic outline of his approach is pretty similar to Feynman&amp;rsquo;s Algorithm:&lt;/p></description></item></channel></rss>
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diff --git a/tags/thoughts/index.html b/tags/thoughts/index.html
index 9bd046b..951e9b5 100644
--- a/tags/thoughts/index.html
+++ b/tags/thoughts/index.html
@@ -1,5 +1,5 @@
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diff --git a/tags/thoughts/index.xml b/tags/thoughts/index.xml
index 5dca434..44ea18b 100644
--- a/tags/thoughts/index.xml
+++ b/tags/thoughts/index.xml
@@ -1,3 +1,10 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Thoughts on kiennt26's home</title><link>https://ntk148v.github.io/tags/thoughts/</link><description>Recent content in Thoughts on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/thoughts/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>A collection of interesting thoughts and opinions that I come across Willingness to look stupid Willingness to look stupidhttps://t.co/0WrVAzLQ6g pic.twitter.com/6NjysMwbch
-&amp;mdash; Dan Luu (@danluu) October 21, 2021 I recently read this article by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.
-People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:.</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Thoughts on kiennt26's home</title><link>https://ntk148v.github.io/tags/thoughts/</link><description>Recent content in Thoughts on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Fri, 03 Nov 2023 13:16:00 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/thoughts/index.xml" rel="self" type="application/rss+xml"/><item><title>Thoughts</title><link>https://ntk148v.github.io/posts/thoughts/</link><pubDate>Fri, 03 Mar 2023 09:33:58 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/thoughts/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ A collection of interesting thoughts and opinions that I come across
+&lt;/blockquote>
+
+&lt;h2 id="willingness-to-look-stupid">Willingness to look stupid&lt;/h2>
+&lt;div align="center">
+ &lt;blockquote class="twitter-tweet">&lt;p lang="en" dir="ltr">Willingness to look stupid&lt;a href="https://t.co/0WrVAzLQ6g">https://t.co/0WrVAzLQ6g&lt;/a> &lt;a href="https://t.co/6NjysMwbch">pic.twitter.com/6NjysMwbch&lt;/a>&lt;/p>&amp;mdash; Dan Luu (@danluu) &lt;a href="https://twitter.com/danluu/status/1451114505438568448?ref_src=twsrc%5Etfw">October 21, 2021&lt;/a>&lt;/blockquote> &lt;script async src="https://platform.twitter.com/widgets.js" charset="utf-8">&lt;/script>
+&lt;/div>
+&lt;p>I recently read &lt;a href="https://danluu.com/look-stupid/">this article&lt;/a> by Dan Luu (what a clickbait headline). At first, this seems like a terrible (and stupid) idea. Who wants to look stupid? But after read the whole article, I get the point.&lt;/p>
+&lt;p>People avoid looking stupid even though they may not fully understanding something, and honestly I do the same thing :man_facepalming:. I&amp;rsquo;d keep my mouth shut rather than ask questions to clarify the problem, most of the time (at work, at some conferences, at university, &amp;hellip;). And I know that I&amp;rsquo;m not the only one, look smart but being stupid.&lt;/p></description></item></channel></rss>
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diff --git a/tags/tiling-vm/index.html b/tags/tiling-vm/index.html
index b005bf2..0657664 100644
--- a/tags/tiling-vm/index.html
+++ b/tags/tiling-vm/index.html
@@ -1,5 +1,5 @@
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\ No newline at end of file
diff --git a/tags/tiling-vm/index.xml b/tags/tiling-vm/index.xml
index 601a8a6..ff54291 100644
--- a/tags/tiling-vm/index.xml
+++ b/tags/tiling-vm/index.xml
@@ -1,3 +1,50 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tiling-Vm on kiennt26's home</title><link>https://ntk148v.github.io/tags/tiling-vm/</link><description>Recent content in Tiling-Vm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tiling-vm/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>According to Reddis post and i3-gaps issue, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer doesn&amp;rsquo;t like it. But nevermind, we still have two ways to achieve it.
-Rounded i3-gaps Resloved have an awesome fork to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it here.
-Install i3-gaps. # Dependencies sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tiling-Vm on kiennt26's home</title><link>https://ntk148v.github.io/tags/tiling-vm/</link><description>Recent content in Tiling-Vm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tiling-vm/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started Tiling Wm [Part 6] I3 Rounded Corners</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</link><pubDate>Mon, 10 Jan 2022 13:45:01 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-6-i3-rounded-corners/</guid><description>&lt;p>According to &lt;a href="https://www.reddit.com/r/unixporn/comments/7h0rm0/what_would_you_want_in_a_wm/">Reddis post&lt;/a> and &lt;a href="https://github.com/Airblader/i3/issues/167">i3-gaps issue&lt;/a>, it seems like a lot of people would like this. But Airblade - i3-gaps maintainer &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-328562433">doesn&amp;rsquo;t like it&lt;/a>. But nevermind, we still have two ways to achieve it.&lt;/p>
+&lt;h2 id="rounded-i3-gaps">Rounded i3-gaps&lt;/h2>
+&lt;p>&lt;a href="https://github.com/resloved">Resloved&lt;/a> have an awesome &lt;a href="https://github.com/resloved/i3">fork&lt;/a> to implement rounded corners. I fork it again to keep it up-to-date with the upstream i3-gaps. You can check it &lt;a href="https://github.com/ntk148v/i3">here&lt;/a>.&lt;/p>
+&lt;ul>
+&lt;li>Install i3-gaps.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Dependencies&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt install git libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-util0-dev libxcb-icccm4-dev libyajl-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libstartup-notification0-dev libxcb-randr0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libev-dev libxcb-cursor-dev libxcb-xinerama0-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> autoconf libxcb-xrm0 libxcb-xrm-dev automake i3status &lt;span class="se">\
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="se">&lt;/span> ninja-build meson libxcb-shape0-dev build-essential -y
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ntk148v/i3.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> i3/
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Compile&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mkdir -p build &lt;span class="o">&amp;amp;&amp;amp;&lt;/span> &lt;span class="nb">cd&lt;/span> build
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">meson ..
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">ninja
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo ninja install
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Configure rounded corners by adding this to your config.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">border_radius 10
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result, but you can see that these corners look so jagged (check out this &lt;a href="https://github.com/Airblader/i3/issues/167#issuecomment-485263770">comment&lt;/a>).&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-1.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-4.png">
+&lt;/figure>
+
+&lt;h2 id="picom">picom&lt;/h2>
+&lt;ul>
+&lt;li>You can also achieve rounded corners by using &lt;a href="https://github.com/yshui/picom">picom&lt;/a>.&lt;/li>
+&lt;li>Install picom.&lt;/li>
+&lt;li>Configure rounded corners by changing &lt;code>corner_radius&lt;/code> value.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl"># Path ~/.config/picom.conf
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">corner_radius: 10;
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Result looks much smoother.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-2.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-6/rounded-corners-3.png">
+&lt;/figure></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/tiling-wm/index.html b/tags/tiling-wm/index.html
index d3859ff..805ba5b 100644
--- a/tags/tiling-wm/index.html
+++ b/tags/tiling-wm/index.html
@@ -1,5 +1,5 @@
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Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class=col-span-2>Getting Started with Tiling WM [Part 4] - Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-5-compton/ class=col-span-2>Getting Started with Tiling WM [Part 5] - Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a 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Polybar</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-4-xresources/ class=col-span-2>Getting Started with Tiling WM [Part 4] - Xresources</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div><div class="grid grid-cols-3 gap-4 my-2"><a href=/posts/getting-started-tiling-wm-part-5-compton/ class=col-span-2>Getting Started with Tiling WM [Part 5] - Compton</a><div class="flex justify-end"><time class="text-sm italic tabular-nums text-muted">2021/04/19&nbsp;</time></div></div></div></div></article></div></main><footer class="fixed left-0 bottom-0 w-full bg-base px-page-gutter"><div class="flex justify-center items-center h-footer-height"><div class="flex flex-row w-full max-w-content justify-between lowercase italic gap-3"><nav><a 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diff --git a/tags/tiling-wm/index.xml b/tags/tiling-wm/index.xml
index 7d4a2a5..e05cca3 100644
--- a/tags/tiling-wm/index.xml
+++ b/tags/tiling-wm/index.xml
@@ -1,4 +1,197 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tiling-Wm on kiennt26's home</title><link>https://ntk148v.github.io/tags/tiling-wm/</link><description>Recent content in Tiling-Wm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tiling-wm/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>Disclaimer
-I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.
-Overview Window Manager First of all, you have to know the basic concepts.</description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>In the part1, I&amp;rsquo;ve used rofi instead of dmenu. This part will show you how to start with rofi. Introduction Rofi is a window switcher, application launcher and dmenu replacement. Features: Fully configurable keyboard navigation. Type to filer. Built-in modes: Window switcher mode. Application laucher. Desktop file application launcher. SSH laucher mode. History-based ordering. &amp;hellip; Getting started Installing rofi is quite easy. sudo apt install rofi -y Run it for the first time.</description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>Overview According to Polybar frontpage, Polybar is A fast and easy to use tool for creating status bars .
-WIP</description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description> WIP</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tiling-Wm on kiennt26's home</title><link>https://ntk148v.github.io/tags/tiling-wm/</link><description>Recent content in Tiling-Wm on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tiling-wm/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 1] - I3</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ &lt;p>&lt;strong>Disclaimer&lt;/strong>&lt;/p>
+&lt;p>I love customizing desktop. I make changes in my desktop everyday, make it look eye candy. My colleagues ask me how to make their desktop look like mine. But there are many steps and things to learn and follow, I know because I&amp;rsquo;ve gone throught it. Therefore I decide to write this getting-started guide to give people a shortest path to Fancy world.&lt;/p>
+
+&lt;/blockquote>
+
+&lt;h2 id="overview-window-manager">Overview Window Manager&lt;/h2>
+&lt;p>First of all, you have to know the basic concepts.&lt;/p></description></item><item><title>Getting Started with Tiling WM [Part 2] - Rofi</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-2-rofi/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-foam">
+ In the &lt;a href="https://ntk148v.github.io/posts/getting-started-tiling-wm-part-1-i3/">part1&lt;/a>, I&amp;rsquo;ve used &lt;code>rofi&lt;/code> instead of &lt;code>dmenu&lt;/code>. This part will show you how to start with &lt;code>rofi&lt;/code>.
+&lt;/blockquote>
+
+&lt;h2 id="introduction">Introduction&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/davatorium/rofi">Rofi&lt;/a> is a window switcher, application launcher and dmenu replacement.&lt;/li>
+&lt;li>Features:
+&lt;ul>
+&lt;li>Fully configurable keyboard navigation.&lt;/li>
+&lt;li>Type to filer.&lt;/li>
+&lt;li>Built-in modes:
+&lt;ul>
+&lt;li>Window switcher mode.&lt;/li>
+&lt;li>Application laucher.&lt;/li>
+&lt;li>Desktop file application launcher.&lt;/li>
+&lt;li>SSH laucher mode.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>History-based ordering.&lt;/li>
+&lt;li>&amp;hellip;&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;/ul>
+&lt;h2 id="getting-started">Getting started&lt;/h2>
+&lt;ul>
+&lt;li>Installing &lt;code>rofi&lt;/code> is quite easy.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install rofi -y
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it for the first time.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -lines &lt;span class="m">12&lt;/span> -padding &lt;span class="m">18&lt;/span> -width &lt;span class="m">60&lt;/span> -location &lt;span class="m">0&lt;/span> -show drun -sidebar-mode -columns &lt;span class="m">3&lt;/span> -font &lt;span class="s1">&amp;#39;DejaVu Sans 8&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;details >&lt;summary>&lt;/summary>
+ &lt;div>
+ &lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl"> -show mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open rofi in a certain mode. Available modes are window, run, drun, ssh, combi. The
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> special argument keys can be used to open a searchable list of supported key bind‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> ings &lt;span class="o">(&lt;/span>see KEY BINDINGS&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> To show the run-dialog:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -lines
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Maximum number of lines to show before scrolling.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -lines &lt;span class="m">25&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">15&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -location
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Specify where the window should be located. The numbers map to the following loca‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tions on screen:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">1&lt;/span> &lt;span class="m">2&lt;/span> &lt;span class="m">3&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">8&lt;/span> &lt;span class="m">0&lt;/span> &lt;span class="m">4&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="m">7&lt;/span> &lt;span class="m">6&lt;/span> &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -padding
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Define the inner margin of the window.
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Default: &lt;span class="m">5&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> -sidebar-mode
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> Open in sidebar-mode. In this mode a list of all enabled modes is shown at the bot‐
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> tom. &lt;span class="o">(&lt;/span>See -modi option&lt;span class="o">)&lt;/span> To show sidebar, use:
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> rofi -show run -sidebar-mode -lines &lt;span class="m">0&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>
+ &lt;/div>
+&lt;/details>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-default-2.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Press hot key (defined in i3 configuration file) &lt;code>&amp;lt;Window&amp;gt;+d&lt;/code> to start rofi. Use &lt;code>&amp;lt;Shift&amp;gt;+&amp;lt;left/right&amp;gt;&lt;/code> to switch between mode.&lt;/li>
+&lt;li>More details you can found in &lt;a href="https://github.com/davatorium/rofi">rofi github&lt;/a>.&lt;/li>
+&lt;/ul>
+&lt;h2 id="tweaking">Tweaking&lt;/h2>
+&lt;ul>
+&lt;li>The default setup looks quite boring. Let&amp;rsquo;s tweak a bit!&lt;/li>
+&lt;li>There are currently three methods of setting configuration options:
+&lt;ul>
+&lt;li>&lt;em>Local configuration. Normally, depending on XDG, in ~/.config/rofi/config. This uses the Xresources format&lt;/em>.&lt;/li>
+&lt;li>Xresources: A method of storing key values in the Xserver. See here for more information.&lt;/li>
+&lt;li>Command line options: Arguments are passed to Rofi.&lt;/li>
+&lt;/ul>
+&lt;/li>
+&lt;li>We will use configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">mkdir -p ~/.config/rofi/themes
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">touch ~/.config/rofi/themes/onedark.theme
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Copy the follow content into &lt;code>~/.config/rofi/themes/onedark.theme&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">configuration {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> show-icons: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> modi: &amp;#34;window,run,drun&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">* {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background: #282c34;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> foreground: #abb2bf;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-normal-background: #98c379;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-background: #e5c07b;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> selected-urgent-foreground: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> border: 5;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> lines: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> margin: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> spacing: 0;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">window {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> width: 50%;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> transparency: &amp;#34;real&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">mainbox {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [inputbar, listview];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">listview {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> columns: 1;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> orientation: vertical;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @foreground;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">element selected {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @selected-normal-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">inputbar {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> background-color: @background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> children: [prompt, entry];
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">prompt {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> enabled: true;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> font: &amp;#34;DejaVu Sans Mono 10&amp;#34;;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12 0 0 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">entry {
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> padding: 12;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> text-color: @selected-urgent-background;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">}
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Run it and you can see the magic!&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/getting-started-tiling-wm-part-1/rofi-custom.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Don&amp;rsquo;t forget to update hotkey in i3 configuration file.&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-fallback" data-lang="fallback">&lt;span class="line">&lt;span class="cl">bindsym $mod+d exec rofi -theme ~/.config/rofi/themes/onedark.theme -show drun
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Getting Started with Tiling WM [Part 3] - Polybar</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-3-polybar/</guid><description>&lt;h2 id="overview">Overview&lt;/h2>
+&lt;p>&lt;a href="https://polybar.github.io/">According to Polybar frontpage&lt;/a>, &lt;code>Polybar is A fast and easy to use tool for creating status bars &lt;/code>.&lt;/p>
+ 
+
+&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item><item><title>Getting Started with Tiling WM [Part 5] - Compton</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-5-compton/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item></channel></rss>
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diff --git a/tags/tips/index.xml b/tags/tips/index.xml
index f5b98c3..c79b16e 100644
--- a/tags/tips/index.xml
+++ b/tags/tips/index.xml
@@ -1,3 +1,207 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tips on kiennt26's home</title><link>https://ntk148v.github.io/tags/tips/</link><description>Recent content in Tips on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tips/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>bat - (cat alternative) bat: A cat(1) clone with syntax highlighting and Git integration. Example: fd - (find alternative) fd: a simple, fast and user-friendly alternative to find. Examples: httpie - (wget/curl alternative) httpie: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more. Examples: # Hello world $ http httpie.io/hello # Custom HTTP method, HTTP headers and JSON data $ http PUT pie.</description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>NOTE: Environment Ubuntu 20.04
-Dependencies Xwinwrap: sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev git clone https://github.com/ujjwal96/xwinwrap.git cd xwinwrap make sudo make install make clean Gifsicle: sudo apt install gifsicle The helper script A helper script to setup animated .gif in dual monitors.
-#!/bin/bash # Uses xwinwrap to display given animated .gif in dual monitors. if [ $# -ne 1 ]; then echo 1&amp;gt;&amp;amp;2 Usage: $0 image.gif exit 1 fi gif=$1 killall -9 xwinwrap killall -9 gifview # Get monitors resolution SCR1=`xrandr | awk &amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;` SCR2=`xrandr | awk &amp;#39;!</description></item></channel></rss>
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+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tips on kiennt26's home</title><link>https://ntk148v.github.io/tags/tips/</link><description>Recent content in Tips on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 05 Dec 2024 10:36:54 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tips/index.xml" rel="self" type="application/rss+xml"/><item><title>Linux Magic System Request Key Hacks</title><link>https://ntk148v.github.io/posts/linux-sysrq/</link><pubDate>Thu, 05 Dec 2024 09:44:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-sysrq/</guid><description>&lt;p>Source: &lt;a href="https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html">https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html&lt;/a>&lt;/p>
+&lt;h2 id="giới-thiệu">Giới thiệu&lt;/h2>
+&lt;p>Trong quá trình vận hành, bạn đã bao giờ gặp tình trạng hệ thống Linux của mình bị &amp;ldquo;treo&amp;rdquo; hoặc không phản hồi? Khi đó, hãy sử dụng &lt;strong>Magic System Request Key (SysRq)&lt;/strong> để được cứu rỗi. Vậy nó là gì và có thể làm gì?&lt;/p>
+&lt;p>SysRq là một tính năng của Linux, cho phép người dùng gửi &amp;ldquo;tín hiệu cầu cứu&amp;rdquo; trực tiếp đến kernel của hệ điều hành.&lt;/p></description></item><item><title>Linux tools that you never knew you needed</title><link>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</link><pubDate>Wed, 07 Apr 2021 09:45:59 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/linux-tools-that-you-never-knew-you-needed/</guid><description>&lt;h2 id="bat---cat-alternative">bat - (cat alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/bat">bat&lt;/a>: A cat(1) clone with syntax highlighting and Git integration.&lt;/li>
+&lt;li>Example:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/bat.png">
+&lt;/figure>
+
+&lt;h2 id="fd---find-alternative">fd - (find alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/sharkdp/fd">fd&lt;/a>: a simple, fast and user-friendly alternative to &lt;code>find&lt;/code>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/sharkdp/fd/master/doc/screencast.svg">
+&lt;/figure>
+
+&lt;h2 id="httpie---wgetcurl-alternative">httpie - (wget/curl alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://httpie.io">httpie&lt;/a>: a user-friendly command-line HTTP client for the API era. It comes with JSON support, syntax highlighting, persistent sessions, wget-like downloads, plugins, and more.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Hello world&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http httpie.io/hello
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Custom HTTP method, HTTP headers and JSON data&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http PUT pie.dev/put X-API-Token:123 &lt;span class="nv">name&lt;/span>&lt;span class="o">=&lt;/span>John
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Submitting forms&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http -f POST pie.dev/post &lt;span class="nv">hello&lt;/span>&lt;span class="o">=&lt;/span>World
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Upload a file using redirect input&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ http pie.dev/post &amp;lt; files/data.json
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://httpie.io&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="ripgrep---grep-alternative">ripgrep - (grep alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep">ripgrep&lt;/a>: a faster &lt;code>grep&lt;/code>. ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.&lt;/li>
+&lt;li>&lt;a href="https://github.com/BurntSushi/ripgrep#quick-examples-comparing-tools">Benchmark&lt;/a>.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Basic use&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg fast README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Regular expressions&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fast\w+&amp;#39;&lt;/span> README.md
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Recursive search - recursively searching the directory (current directory is default)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ rg &lt;span class="s1">&amp;#39;fn write\(&amp;#39;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="delta">delta&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/dandavison/delta">delta&lt;/a>: Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.&lt;/li>
+&lt;li>Diff/git diff doesn&amp;rsquo;t show you exactly what was changed.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/git-diff.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Delta shows within-line highlights based on a Levenshtein edit inference algorithm.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/delta.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>By default, delta restructures the git output slightly to make the hunk markers human-readable:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://user-images.githubusercontent.com/52205/81059276-254cf980-8e9e-11ea-95c3-8b757a4c11b5.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Example config:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>core&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> pager: delta
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>delta&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> plus-style: &lt;span class="s2">&amp;#34;syntax #98c379&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> minus-style: &lt;span class="s2">&amp;#34;syntax #e06c75&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> syntax-theme: OneHalfDark
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> navigate: &lt;span class="nb">true&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> features: line-numbers decorations
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="o">[&lt;/span>interactive&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> diffFilter: delta --color-only
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Completely replace &lt;code>diff&lt;/code> with &lt;code>delta&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">diff&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;delta&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="z">z&lt;/h2>
+&lt;ul>
+&lt;li>Tired for &lt;code>cd&lt;/code>ing into the same directories over and over? Save your time with &lt;code>z&lt;/code> command!&lt;/li>
+&lt;li>&lt;a href="https://github.com/rupa/z">z&lt;/a>: jump around. Z is a shell script that makes jumping around your file directory pleasantly simple. Instead of trying to remember the exact path of where you need to go, or worse, &lt;code>cd&lt;/code>ing into the next directory followed by &lt;code>ls&lt;/code>ing and then cding again over and over (we’ve all been there), Z allows you to “lazy type” where you want to go and it’ll handle the rest.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Takes me to my workspace folder from anywhere.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ z workspace
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="fzf">fzf&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/junegunn/fzf">fzf&lt;/a>: fzf is a general-purpose command-line fuzzy finder.&lt;/li>
+&lt;li>It&amp;rsquo;s an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Read the list from STDIN and write the selected item to STDOUT&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ find * -type f &lt;span class="p">|&lt;/span> fzf &amp;gt; selected
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim &lt;span class="k">$(&lt;/span>fzf&lt;span class="k">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># COMMAND **&amp;lt;TAB&amp;gt;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under the current directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># - You can select multiple items with TAB key&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under parent directory that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ../fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Files under your home directory&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ vim ~/**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under current directory (single-selection)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Directories under ~/github that match `fzf`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">cd&lt;/span> ~/github/fzf**&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Can select multiple processes with &amp;lt;TAB&amp;gt; or &amp;lt;Shift-TAB&amp;gt; keys&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">kill&lt;/span> -9 &amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unset&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">export&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ &lt;span class="nb">unalias&lt;/span> **&amp;lt;TAB&amp;gt;
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, checkout: https://github.com/junegunn/fzf&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-vim.png">
+&lt;/figure>
+
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/fzf-cd.png">
+&lt;/figure>
+
+&lt;h2 id="thefuck">thefuck&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/nvbn/thefuck">thefuck&lt;/a>: Magnificent app which corrects your previous console command.&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">$ apt-get install vim
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Could not open lock file /var/lib/dpkg/lock - open &lt;span class="o">(&lt;/span>13: Permission denied&lt;span class="o">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">E: Unable to lock the administration directory &lt;span class="o">(&lt;/span>/var/lib/dpkg/&lt;span class="o">)&lt;/span>, are you root?
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">$ fuck
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo apt-get install vim &lt;span class="o">[&lt;/span>enter/↑/↓/ctrl+c&lt;span class="o">]&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">Reading package lists... Done
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">...
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># ...&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># For more examples, check out: https://github.com/nvbn/thefuck&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="exa---ls-alternative">exa - (ls alternative)&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://the.exa.website">exa&lt;/a>: A modern replacement for ls. &lt;code>exa&lt;/code> is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.&lt;/li>
+&lt;li>Examples:&lt;/li>
+&lt;/ul>
+&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa.png">
+&lt;/figure>
+
+&lt;ul>
+&lt;li>Completely replace &lt;code>ls&lt;/code> with &lt;code>exa&lt;/code>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">alias&lt;/span> &lt;span class="nv">ls&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s2">&amp;#34;exa&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;figure class="figure">&lt;img src="https://ntk148v.github.io/photos/linux-tools-that-you-never-knew-you-needed/exa-ls.png">
+&lt;/figure></description></item><item><title>Set Animated Gif as Wallpaper</title><link>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</link><pubDate>Thu, 14 Jan 2021 09:36:34 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/set-animated-gif-as-wallpaper/</guid><description>&lt;blockquote>
+&lt;p>&lt;strong>NOTE&lt;/strong>: Environment Ubuntu 20.04&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="dependencies">Dependencies&lt;/h2>
+&lt;ul>
+&lt;li>&lt;a href="https://github.com/ujjwal96/xwinwrap">Xwinwrap&lt;/a>:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt-get install xorg-dev build-essential libx11-dev x11proto-xext-dev libxrender-dev libxext-dev
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">git clone https://github.com/ujjwal96/xwinwrap.git
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">cd&lt;/span> xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">sudo make install
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">make clean
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
+&lt;li>Gifsicle:&lt;/li>
+&lt;/ul>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">sudo apt install gifsicle
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="the-helper-script">The helper script&lt;/h2>
+&lt;p>A helper script to setup animated .gif in dual monitors.&lt;/p>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-bash" data-lang="bash">&lt;span class="line">&lt;span class="cl">&lt;span class="cp">#!/bin/bash
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="cp">&lt;/span>&lt;span class="c1"># Uses xwinwrap to display given animated .gif in dual monitors.&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">if&lt;/span> &lt;span class="o">[&lt;/span> &lt;span class="nv">$#&lt;/span> -ne &lt;span class="m">1&lt;/span> &lt;span class="o">]&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="k">then&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">echo&lt;/span> 1&amp;gt;&lt;span class="p">&amp;amp;&lt;/span>&lt;span class="m">2&lt;/span> Usage: &lt;span class="nv">$0&lt;/span> image.gif
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nb">exit&lt;/span> &lt;span class="m">1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="k">fi&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">gif&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nv">$1&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 xwinwrap
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">killall -9 gifview
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1"># Get monitors resolution&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR1&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;/primary/ &amp;amp;&amp;amp; /connected/ { print $4 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nv">SCR2&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="sb">`&lt;/span>xrandr &lt;span class="p">|&lt;/span> awk &lt;span class="s1">&amp;#39;!/primary/ &amp;amp;&amp;amp; /connected/ { print $3 }&amp;#39;&lt;/span>&lt;span class="sb">`&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR1&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">xwinwrap -g &lt;span class="nv">$SCR2&lt;/span> -ov -ni -s -nf -- gifview -w WID &lt;span class="nv">$gif&lt;/span> -a &lt;span class="p">&amp;amp;&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>If you want to run xwinwrap by yourself, here is the example:&lt;/p></description></item></channel></rss>
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\ No newline at end of file
diff --git a/tags/tool/index.xml b/tags/tool/index.xml
index 2ef4a6b..c6087d7 100644
--- a/tags/tool/index.xml
+++ b/tags/tool/index.xml
@@ -1,2 +1,8 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tool on kiennt26's home</title><link>https://ntk148v.github.io/tags/tool/</link><description>Recent content in Tool on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 20 Jun 2024 17:17:59 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tool/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>Source:
-https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/ https://www.digitalocean.com/community/tutorials/atop-command-in-linux https://www.atoptool.nl/index.php top is great, we&amp;rsquo;re all familiar with it. htop is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Tool on kiennt26's home</title><link>https://ntk148v.github.io/tags/tool/</link><description>Recent content in Tool on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Thu, 20 Jun 2024 17:17:59 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/tool/index.xml" rel="self" type="application/rss+xml"/><item><title>Atop</title><link>https://ntk148v.github.io/posts/atop/</link><pubDate>Thu, 20 Jun 2024 17:06:26 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/atop/</guid><description>&lt;p>Source:&lt;/p>
+&lt;ul>
+&lt;li>&lt;a href="https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop">https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop&lt;/a>&lt;/li>
+&lt;li>&lt;a href="http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/">http://freesoftwaremagazine.com/articles/atop_when_you_need_know_exactly_whats_happening_systemresource_level/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.digitalocean.com/community/tutorials/atop-command-in-linux">https://www.digitalocean.com/community/tutorials/atop-command-in-linux&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://www.atoptool.nl/index.php">https://www.atoptool.nl/index.php&lt;/a>&lt;/li>
+&lt;/ul>
+&lt;p>&lt;code>top&lt;/code> is great, we&amp;rsquo;re all familiar with it. &lt;code>htop&lt;/code> is even better, (and with eye-catching look). But sometimes these tools aren&amp;rsquo;t enough, they only give the 10,000 foot overview of resource. They don&amp;rsquo;t allow you to see what part of which program or process is eating up too much RAM or which part is creating race conditions on lock files. And the most important drawback is the lack of historical data. But &lt;a href="https://www.atoptool.nl/index.php">&lt;code>atop&lt;/code>&lt;/a> can. A powerful monitor program that allows you to see system-level counters concerning utilization of CPU and memory/swap, as well as see disk I/O and network utilization counters at the system level &amp;ndash; in real time or &lt;em>historically&lt;/em>. It also allows you to store raw counters in a file for long-term analysis on system levels and process levels, as well as seeing resource consumption for each thread within a process of a multi-processor program.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/trick/index.html b/tags/trick/index.html
index b2f9d23..00a37e2 100644
--- a/tags/trick/index.html
+++ b/tags/trick/index.html
@@ -1,5 +1,5 @@
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\ No newline at end of file
diff --git a/tags/trick/index.xml b/tags/trick/index.xml
index 0d56be1..715e8e9 100644
--- a/tags/trick/index.xml
+++ b/tags/trick/index.xml
@@ -1,4 +1,53 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Trick on kiennt26's home</title><link>https://ntk148v.github.io/tags/trick/</link><description>Recent content in Trick on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/trick/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:
-References Firstly give them some credits:
-https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/ https://pliutau.com/different-ways-to-block-go-runtime-forever/ NOTE: I run these with Golang 1.12
-The original package main import &amp;#34;fmt&amp;#34; func show() { for i := 1; i &amp;lt; 9696969; i++ { time.Sleep(1000) fmt.Println(i) } } func main() { go show() // The main goroutine is exited before the show() be done.</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Trick on kiennt26's home</title><link>https://ntk148v.github.io/tags/trick/</link><description>Recent content in Trick on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Wed, 30 Aug 2023 09:43:02 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/trick/index.xml" rel="self" type="application/rss+xml"/><item><title>Golang: Block forever</title><link>https://ntk148v.github.io/posts/golang-block-forever/</link><pubDate>Mon, 27 Apr 2020 15:59:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/golang-block-forever/</guid><description>&lt;p>Sometimes, you want to block the current goroutine when allowing others to continue. Here is some tricks I&amp;rsquo;ve collected:&lt;/p>
+&lt;h2 id="references">References&lt;/h2>
+&lt;p>Firstly give them some credits:&lt;/p>
+&lt;ol>
+&lt;li>&lt;a href="https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/">https://blog.sgmansfield.com/2016/06/how-to-block-forever-in-go/&lt;/a>&lt;/li>
+&lt;li>&lt;a href="https://pliutau.com/different-ways-to-block-go-runtime-forever/">https://pliutau.com/different-ways-to-block-go-runtime-forever/&lt;/a>&lt;/li>
+&lt;/ol>
+&lt;blockquote>
+&lt;p>NOTE: I run these with Golang 1.12&lt;/p>
+&lt;/blockquote>
+&lt;h2 id="the-original">The original&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">1000&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="c1">// The main goroutine is exited before the show() be done.
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="bad---an-empty-infinite-loop">Bad - An empty infinite loop&lt;/h2>
+&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">package&lt;/span> &lt;span class="nx">main&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="p">(&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;fmt&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="s">&amp;#34;time&amp;#34;&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="c1">// Empty, just do nothing
+&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="c1">&lt;/span> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">for&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="o">:=&lt;/span> &lt;span class="mi">1&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span> &lt;span class="p">&amp;lt;&lt;/span> &lt;span class="mi">9696969&lt;/span>&lt;span class="p">;&lt;/span> &lt;span class="nx">i&lt;/span>&lt;span class="o">++&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Sleep&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="mi">5&lt;/span> &lt;span class="o">*&lt;/span> &lt;span class="nx">time&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nx">Second&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="nx">i&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="kd">func&lt;/span> &lt;span class="nf">main&lt;/span>&lt;span class="p">()&lt;/span> &lt;span class="p">{&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="k">go&lt;/span> &lt;span class="nf">show&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nf">forever&lt;/span>&lt;span class="p">()&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nx">fmt&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="nf">Println&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s">&amp;#34;OK we&amp;#39;re done&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
+&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="p">}&lt;/span>
+&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>An infinite loop here is a busy loop that does nothing except burn CPU time.&lt;/p></description></item></channel></rss>
\ No newline at end of file
diff --git a/tags/xresources/index.html b/tags/xresources/index.html
index e1126b3..5ddacf0 100644
--- a/tags/xresources/index.html
+++ b/tags/xresources/index.html
@@ -1,5 +1,5 @@
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\ No newline at end of file
diff --git a/tags/xresources/index.xml b/tags/xresources/index.xml
index 538a22e..1c15471 100644
--- a/tags/xresources/index.xml
+++ b/tags/xresources/index.xml
@@ -1 +1,3 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Xresources on kiennt26's home</title><link>https://ntk148v.github.io/tags/xresources/</link><description>Recent content in Xresources on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/xresources/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description> WIP</description></item></channel></rss>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Xresources on kiennt26's home</title><link>https://ntk148v.github.io/tags/xresources/</link><description>Recent content in Xresources on kiennt26's home</description><generator>Hugo</generator><language>en-us</language><managingEditor>kiennt2609@gmail.com (Kien Nguyen-Tuan)</managingEditor><webMaster>kiennt2609@gmail.com (Kien Nguyen-Tuan)</webMaster><lastBuildDate>Mon, 20 Feb 2023 11:11:24 +0700</lastBuildDate><atom:link href="https://ntk148v.github.io/tags/xresources/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting Started with Tiling WM [Part 4] - Xresources</title><link>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</link><pubDate>Mon, 19 Apr 2021 10:10:21 +0700</pubDate><author>kiennt2609@gmail.com (Kien Nguyen-Tuan)</author><guid>https://ntk148v.github.io/posts/getting-started-tiling-wm-part-4-xresources/</guid><description>&lt;blockquote class="my-5 p-4 rounded border-solid border-2 border-iris">
+ &lt;strong>WIP&lt;/strong>
+&lt;/blockquote></description></item></channel></rss>
\ No newline at end of file