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question is simple how can I create shot down short cut on keyboard so when I press that buttons computer will shot down

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2 Answers 2

There is already a shortcut for this. http://en.wikipedia.org/wiki/Magic_SysRq_key

I assume your case it's ctrl + alt + printscr + o. But look it up in the table provided there.

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you can also create your own shortcuts by using xbindkeys, see this tutorial: http://www.butlerpc.net/blog/2011/01/using-xbindkeys-on-ubuntu-linux-to-remap-key-commands/

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