Let’s write shell script to adjust screen brightness.
# Bash script to control the monitor brightness
screenname=$(xrandr | grep “ connected” | cut -f1 -d” “)
xrandr — output $screenname — brightness $brightness_level;
and save with your-name.sh
In this case we are using $1 as parameter for brightness level as we want to adjust.
So, at last we can run that .sh file as
sh your-name.sh 0.4
Brightness level range is 0 to 1.
That’s all thanks.