Linux logged out a user automatically

Posted on in Categories , , , , , , last updated November 6, 2007

Q. We have a few users who frequently forget to log out and I’d like to force them or automatically log out a user in case of inactivity detected. How do I force user to be logged out automatically?

A. BASH provides TMOUT variable. It is necessary for security reasons to have an inactive user logged out after a period of inactivity from Linux / UNIX ssh / telnet session. This can be accomplished by setting an environment variable TMOUT.

Automatically log out a user

Add the TMOUT variable to your /etc/bashrc file:
# vi /etc/bashrc
Set TMOUT to 300 seconds (5 minuets):
TMOUT=300
Save an close the file. Above config would automatically logout users after 300 seconds of inactivity. Please note that this hack only works with run level 2, 3 i.e. it will not work with GUI sessions.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

4 comment

  1. Hullo Anil,
    if you read carefully, you are editting the “/etc/bashrc” – this is the *system* (global) BASH Resource Configuration file. Hence, editting this file will make it affect *all* (subsequent) logons.
    You could (in theory) in your own .bashrc modify the value to something else (e.g. to 600seconds = 10mins) if you wished.
    hth,
    .h

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