Turn off the screen by time

for example, if you have a working x-server, you can use the xset program.

current dpms state (display power management signaling):

 $ xset q | tail -n 4 DPMS (Energy Star): Standby: 600 Suspend: 600 Off: 600 DPMS is Enabled Monitor is On 

You can disable / enable dpms like this:

 $ xset -dpms $ xset +dpms 

about the disabled dpms program xset with the q parameter and will write:

 $ xset q | tail -n 1 DPMS is Disabled 

you can change the time (in seconds) for standby, suspend and off (i.e., turn off the monitor), so:

 $ xset dpms 100 200 300 

check:

 $ xset q | tail -n 4 DPMS (Energy Star): Standby: 100 Suspend: 200 Off: 300 DPMS is Enabled Monitor is On 

read more in man xset .

in the absence of a working x-server, you can use the setterm program. in particular, the following options will be useful: --blank , --powersave , --powerdown (with the necessary parameters).

read more in man setterm .