Linux / UNIX: Run Commands When You Log Out

Posted on in Categories , last updated November 23, 2010

I’ve written a Perl script that connects to our central server for me and it allows me feed data so that I make a timesheet later. How do I run my script when I log out from Apple OS X or Linux / UNIX workstation using bash shell?

Almost all modern shell including bash allows you run run command when you log out. Typically this is used to:

  1. Clean up screen with clear command.
  2. Remove history and other temporary file.
  3. Run commands or scripts and so on.

Logout file name

Commands in .logout are run when you log out.

  1. bash shell: ~/.bash_logout
  2. tcsh / csh: ~/.logout

Edit $HOME/.bash_logout and add your command:
$ vi ~/.bash_logout
Sample logout configuration:

if [ "$SHLVL" = 1 ]; then
    #clear screen
    [ -x /usr/bin/clear_console ] && /usr/bin/clear_console -q
 
    # delete mysql history
    [ -f $HOME/.mysql_history ] && /bin/rm $HOME/.mysql_history
 
    # Update ip accounting
    [ -x /usr/bin/ip_accouting ] && /usr/bin/ip_accouting -u "$USER" -a
 
   # call your script here
   [ -x /usr/local/bin/timesheet_client.pl ] && /usr/local/bin/timesheet_client.pl
fi

A Note About Old Shell And Bourne / KSH Shell

Older UNIX shell and the Bourne / ksh shell don’t have a logout file. So edit ~/.profile file, enter:
$ vi ~/.profile
Next append the following line:

trap '. $HOME/.my_shell_logout; exit' 0

Save and close the file. Finally create $HOME/.my_shell_logout, enter:
$ vi $HOME/.my_shell_logout
Sample config

   # call your script here
  if [ -f /usr/local/bin/timesheet_client.pl ] 
  then 
    /usr/local/bin/timesheet_client.pl
  fi

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+.

3 comment

    1. Eric, the trap 0, will work whenever you exit a shell. So from any X session like xterm or terminal, the above trap will execute whatever you want it to, when you type exit. Just be careful because it will execute that step, whenever you try to exit the shell from any window. Hope this helps!

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