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When my Ubuntu machine is idle for a set period of time, the screen shuts off.

Is there a way to do that immediately using the terminal?

I'm guessing that it involves sending some sort of command to the x server.

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up vote 7 down vote accepted
xset dpms force off

should turn the screen off.

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A million thanks! Just perfect - I tried it out. – Nathan Osman Jun 19 '10 at 20:47

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