xset
User preference utility for X. More information: https://manned.org/xset.
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Disable the screensaver:
xset s off
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Disable the bell sound:
xset b off
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Set the screensaver to start after 60 minutes of inactivity:
xset s 3600 3600
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Disable DPMS (Energy Star) features:
xset -dpms
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Enable DPMS (Energy Star) features:
xset +dpms
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