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#!/bin/bash

screenOffLockFile=/tmp/screen-off-lock

 

if [ -f $screenOffLockFile ];

then

        rm $screenOffLockFile

#       notify-send "Screen on." -i /usr/share/icons/gnome/48x48/devices/display.png

else

        touch $screenOffLockFile

        sleep .5

        while [ -f  $screenOffLockFile ]

        do

                xset dpms force off

                sleep 2

        done

        xset dpms force on

fi