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ctrl alt delete will still reboot your machine. you just need to "kill" the application that is not responding. most window managers let you kill an app on a popup menu on the menu bar or something, or try using something like "xkill" which lets you shoot the defetective program. the proper way to do it though is to run "ps" and find the PID of the buggered program and then kill it using the kill command: "KILL -9 pid_of_program".
alternatively, don;t use badly written KDE applications. :P
really? ctrl/alt/delete doesn't do anything on my system. maybe i have a setting turned off. what usually happens is the screen freezes and i can't move the application out of the way or right click on it. i can press ctrl/alt/delete in MS and still get out of it where here i have to turn the computer off. I run gnome for the most part except for my newsreader whick is knode. maybe thats my problem?
I think it's called xkill
Or, if it's a process that doesn't have a GUI, you could do: ps -aux | grep "process name" and then kill followed by the process ID (pid) of the program. If there's more than one running, you can either give all the pids together (kill 1 2 3 4) or use killall. The man pages for all are fairly self explanatory.
Ooh, just remembered... there's a program 'like' the ol' ctrl+alt+del for Windows called kpm - the KDE Process Manager.
Distribution: RH 6.2, Gen2, Knoppix,arch, bodhi, studio, suse, mint
the gnome one is gtop.
my favorite is still the old way.
open a terminal and type top
you can kill the processes there, or
exit and do them by hand.
signal 15 asks the program to exit.
signal 9 kicks its ass
like kill -15 1543
or kill -9 1543
1543 is a random number i made up.
in top, you can hit k
then it will ask the process number,
then it will ask the signal