Linux script to force logoff users

[WinSlayer]

I want to create a Linux script to force logoff users after a fix time say 60 mins. How do i write a script in linux? I have been writing small batch programs in Windows. But i am totally new to linux. Any Help? Thanks in advance...

[MrChris-]

This may help you... A user will log out after one hour and will get a warning when last 5 minutes are remaining...

#!/bin/bash
hour=1
limit_time=`expr $hour \* 60 - 300`
sleep $limit_time
echo "5 Minutes More for automatic logoff"
sleep 300
logout
exit 0

[WinSlayer]

How to i make this text as a script file? How do i run it at startup with run level 5? I have no idea about this. In windows i just use to add this to startup in program files and it would do the trick. Thanks though.

[Rudra.J]

Open any text editor and copy the above contents there. Now save this file without any extenstion or with .sh extension. Now save this file to /etc/init.d/ location. Then run :

cp logoff.sh /etc/init.d
ln -s /etc/init.d/logoff.sh /etc/rc.d/rc5.d/S50logoff.sh
ln -s /etc/init.d/logoff.sh /etc/rc.d/rc5.d/K50logoff.sh

Now the logoff script is added to the start up...