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Possible Duplicate:
How can I enable Ctrl+Alt+Backspace?

My Esc key sequences (such as those used to restart x etc) don’t seem to work. For example when i press Ctrl+Alt+Backspace which is supposed to restart x-server, nothing happens. Do I need to enable these separately?

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marked as duplicate by Alvin Row, Jorge Castro, Marco Ceppi Nov 23 '10 at 21:10

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you are looking for an answer related with Ctrl+alt+backspace, so change you Ask title - sounds vague and hard to answer. Thanks! – crncosta Nov 23 '10 at 20:27
definitely a duplicate - i should learn to use the search box. – richzilla Nov 23 '10 at 20:45
up vote 1 down vote accepted

You can also do this just for your user. System -> Preferences -> Keyboard go to the Layouts tab and select Options. Then check Key sequence to kill X server.

alt text

Or run gnome-control-center from a terminal if you're using a shell without that same menu hierarchy.

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The killing key sequence can be enabled for all users by adding these lines to your xorg.conf configuration file:

Section "ServerFlags"
    Option "DontZap" "false"
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