LinuxGSM uses tmux to run servers in the background so the server instance is not terminated when you close a terminal session.
{% hint style="info" %} LinuxGSM requires tmux => 1.6 {% endhint %}
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 standard Linux users, this 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.
Some server admins have attempted to run LinuxGSM within a tmux or screen session. As LinuxGSM calls tmux it is not possible to run LinuxGSM within a tmux or screen session.
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.
{% hint style="warning" %} tmux 1.8 is installed on CentOS 7 by default see guide below to installed a newer version {% endhint %}
This issue normally occuires with CentOS and 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 confirm the user has been added check /etc/group.
grep tty /etc/group
tty:x:5:csgoserver
If the default version of tmux (1.8) installed on CentOS 7 it will fail to log the console output. To fix this it is possible to upgrade to a newer version of tmux using 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
Once installed restart the server to complete the upgrade.
restart