Thanks for the responses. Tony, you are correct, I have the same key binding. I thought there was something like this, I just couldn't remember exactly where it was. Ilja, I agree that the dialog I was seeing does not sound like the command /sbin/shutdown -t3 -r now, this is why I was so confused. I don't really want to do this, but was doing an assignment for a class. The question was how to disable the CTRL ALT DEL key combination from shutting down the machine, and if you would have to reboot the machine after making the changes for them to take effect. From the man page for init, I thought I should just be able to edit /etc/inittab then call /sbin/telinit q to have init reread the /etc/inittab file. When this didn't disable the key combination, I was confused and figured the key combination was being caught somewhere else above init. These responses have definitely answered my questions. Thanks so much.