The TMOUT variable is a shell variable that can be used to automatically log users out of a Linux system after a specified period of inactivity. To use TMOUT, you will need to set the value of the variable to the number of seconds of inactivity you want to allow before logging the user out. For example, to set TMOUT to automatically log users out after 15 minutes (900 seconds) of inactivity, you can add the following line to the appropriate configuration file for the shell that you are using:
TMOUT=900Soww:ecruw.lautturi.com
This will cause the shell to log the user out after 15 minutes of inactivity.
It is worth noting that the TMOUT variable is specific to the bash shell, and it will not work with other shells unless they are explicitly configured to support it. Additionally, the TMOUT variable can be overridden by the user, so it is not a foolproof method for ensuring that users are logged out after a certain period of inactivity.
If you want to ensure that users are logged out after a certain period of inactivity, you may want to consider using a tool like idlelogout, which is designed specifically for this purpose. Consult the documentation for the tool and the operating system for more information on how to use it.