Get back CTRL-ALT-Backspace in Fedora and Ubuntu

“Being an old-school Linux user, one of the things that bothers
me is that in some of the new distributions the CTRL-ALT-Backspace
key combination (the combination that would usually kill and
restart the X server) has been disabled. This key combination was
always helpful when/if a program seemed to take over X Windows and
keep you from getting it back. It doesn’t happen often, but I have
found that no matter how stable the distribution, some rogue app is
going to do this now and then. And when it does happen, I want that
magic key combination to work.

“In this article I am going to show you the steps in both Fedora
13 and Ubuntu 10.04 to get this combination back. It’s actually an
easy process, you just have to know the precise places where to
look for the configurations.”

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