Linux bash shell allows you to define the TMOUT environment variable. Set TMOUT to automatically log users out after a period of inactivity. The value is defined in seconds. For example,
The above command will implement a 2 minute idle time-out for the default /bin/bash shell. You can edit your ~/.bash_profile or /etc/profile file as follows to define a 5 minute idle time out:
export TMOUT=120
Save and close the file. The readonly command is used to make variables and functions readonly i.e. you user cannot change the value of variable called TMOUT.
# set a 5 min timeout policy for bash shell
TMOUT=300
readonly TMOUT
export TMOUT
How Do I Disable TMOUT?
To disable auto-logout, just set the TMOUT to zero or unset it as follows:$ export TMOUT=0
or
$ unset TMOUT
Please note that readonly variable can only be disabled by root in /etc/profile or ~/.bash_profile.
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