Set Screen Brightness from TerminalWe can set screen brightness from terminal by using xbacklight. Intially we have to install it before using. Open your terminal and type as
sudo apt-get install xbacklightand then to set brightness to 10% more execute the command as
xbacklight -inc 10To decrease brightness by 10%
xbacklight -dec 10If you want to set the brightness to some level then, you can use the command as
xbacklight -set 50The above command will set the brightness to 50. It will range from 0 to 100.
If you have any issues you can use comments to let me know.
Hope that helps.