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When aliens invade Earth, be first to warn your neighbours by placing your computer screen at a window and executing this potentially Earth-saving command.
Ctrl C when aliens are defeated.
There are 11 alternatives - vote for the best!
If you can do better, submit your command here.
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no neg from me, but it would be nice for the OP to leave a comment when posting a funny one-liner.
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xset dpms force on|offis to turn on and off energy-star features
xset s resetdoes something with the screen saver
sleep 0.3might not work in some systems that do not accept anything except whole seconds.
yeah the 0.3 secs gets rounded to 1 sec on some systems.
although meant for amusement, it does show a simple way to switch the display on/off
combine with a system beep (CTRL-G) for extra annoyance ;-)