this script turns off/on a display of the individual monitor or of the all monitors in the system
display-off.sh [option]
--all turn off/on the displays of the all monitors
--help show help and exit
--version show version info and exit
<output> turn off/on the display of the individual monitor, connected to the <output>
you could get the <output> by xrandr --query command.
usually it looks like smth as HDMI-0 or DP-1
