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tmux

LinuxGSM uses tmux to run servers in the background so the instance is not lost when you close a terminal session.

Tmux is a key component of LinuxGSM and replaced screen which was used on earlier versions. tmux has a few improvements over screen; mainly being better at handling of non root users which was a major issue when developing with screen. tmux allows LinuxGSM to call up a game server running in the background so you can see what it is doing; this feature is available with console feature.

LinuxGSM requires tmux => 1.6 to enable console logging.

tmuxception

You cannot run a tmux session inside another tmux session or inside of a screen session.

Known Issues

Tmux 1.8

tmux 1.8 has an issue that prevents console logging from working. This is because the pipe-pane feature is broken in tmux 1.8 causing it not to output the console to the console log files. The only solution is to use another version of tmux.

Upgrade Tmux CentOS (7)

Upgrade Tmux on CentOS

Upgrade Tmux Ubuntu

http://stackoverflow.com/a/25952511

Here are the steps to update Ubuntu - version 14.04 only (see below for other ubuntu versions):

sudo apt-get update

sudo apt-get install -y python-software-properties software-properties-common

sudo add-apt-repository -y ppa:pi-rho/dev

sudo apt-get update

sudo apt-get install -y tmux=2.0-1~ppa1~t

If you have another ubuntu version you might want to install a different tmux version from the same repo. So:

  • ubuntu 12.04 (Precise Pangolin) step 5: sudo apt-get install -y tmux=1.9a-1~ppa1~p(installs tmux 1.9)
  • ubuntu 13.10 (Saucy Salamander) step 5: sudo apt-get install -y tmux=1.9a-1~ppa1~s (installs tmux 1.9)
  • ubuntu 14.10 (Utopic Unicorn) step 5: sudo apt-get install -y tmux=2.0-1~ppa1~u
  • ubuntu 15.04 (Vivid Vervet) step 5: sudo apt-get install -y tmux=2.0-1~ppa1~v

create session failed: Operation not permitted

This issue occurs on CentOS mainly. This is caused by the standard user not having permissions to user /dev/ptmx.

create session failed: ./srcds_linux -game csgo: Operation not permitted

To fix this the user needs to be part of the tty group.

usermod -G tty csgoserver

To check the user has been added check /etc/group.

grep tty /etc/group

tty:x:5:csgoserver

Installing the latest tmux CentOS 7 using Ghettoforge

If you are using an older version of tmux on CentOS you can upgrade to the latest version by installing the Ghettoforge repository.

Install Ghettoforge with the following command.

yum install http://mirror.ghettoforge.org/distributions/gf/gf-release-latest.gf.el7.noarch.rpm

Install tmux using the Ghettoforge repo.

yum --enablerepo=gf-plus install tmux

Note on live servers

You can install tmux while the server are running, however restarting/stopping them will not be possible

You can do either of the following possibilities

  • Stop all servers before upgrading tmux
  • Upgrade tmux while servers are running, but you must kill the tmux processes to be able to start a new one running the latest version
  • Manually attach the running tmux and manually shut it down.

External links

https://tmux.github.io