In order to enhance the security of the Linux system, we need to automatically disconnect after the user input is idle for a period of time. This operation can be achieved by setting the TMOUT value. Just add the following fields to /etc/profile (valid for all users).
export TMOUT=900 # Set the field to disconnect the terminal if the user does not operate within 900 seconds
readonly TMOUT # set the value to readonly to prevent user changes
Note: After setting readonly, it cannot be canceled under the current shell. You need to comment out the readonly line in /etc/profile or delete it directly, logout and then log in again.
vi /etc/profile
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export TMOUT=900 # Set the idle time to 15 minutes, in seconds; if there is no such line, add it directly
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Save and exit, use the command source /etc/profile to take effect immediately
Shortcut settings
We can adjust the time for linux to judge our login timeout by setting the environment variable TMOUT.
set TMOUT=9000
You can also use the reset method to restore.
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