I may get in trouble for asking this question, but here it goes anyway.
Periodically applications will sieze up on my RH9.0 Linux system and the only way I've found to kill them is to log out. Also, much less rarely, my system will hang and I have to force a reboot.
In MS XP, the Control-Alt-Delete sequence will get to the task manager which allows me to kill applications or even to figure out who's causing the system to hang up. Is there an equivalent in Linux? The Linux System Monitor doesn't appear to be as robust...