xset

User preference utility for X. More information: https://manned.org/xset.

• Disable the screensaver:

xset s off

• Disable the bell sound:

xset b off

• Set the screensaver to start after 60 minutes of inactivity:

xset s 3600 3600

• Disable DPMS (Energy Star) features:

xset -dpms

• Enable DPMS (Energy Star) features:

xset +dpms