keyring needs update in documentation site

[alfredoihernandez]

getting following errors from current commands:

vagrant@master-node:~$ sudo apt-get update -y
Hit:1 http://us.archive.ubuntu.com/ubuntu jammy InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease                                                                          
Hit:3 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease                                                                        
Get:4 http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/1.23/xUbuntu_20.04  InRelease [1,626 B]        
Hit:5 http://us.archive.ubuntu.com/ubuntu jammy-security InRelease                                                                         
Get:7 https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04  InRelease [1,642 B]          
Get:6 https://packages.cloud.google.com/apt kubernetes-xenial InRelease [8,993 B]
Err:6 https://packages.cloud.google.com/apt kubernetes-xenial InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05
Reading package lists... Done
W: GPG error: https://packages.cloud.google.com/apt kubernetes-xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05
E: The repository 'https://apt.kubernetes.io kubernetes-xenial InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

commands causing issue:

sudo curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

new commands that fix issue:

sudo curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -

echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

[Anilkumar-Bathala]

Suppose I want to remove all entire kubernetes cluster we have config all setup with shell even ip table also how I do that? (remove all kubernetes setup what I have done in previews?)