[Shell Script] How to force user to run a shell script on login and force it on logout in UNIX

Sometime we only allow user to perform restricted action defined by the shell script and do not allow them to access normal command prompt, we can do this as follow:

1. Prepare the shell script (e.g. menu.sh)

2. Add the following in the .profile of the user

trap '' 1 2 3 15  # ignore all these signal (ctrl-c, etc)

SHELL=/bin/sh

export SHELL

menu.sh           # the shell script you define to restrict user action

echo "MSG:: This is end of profile"     

exit              # Exit when the shell script complete

notes:

- Info about trap command: http://www.tutorialspoint.com/unix/unix-signals-traps.htm

- Make sure .profile have correct permission (accessible by user itself).

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