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brightnessctl

Utility for reading and controlling device brightness for GNU/Linux operating systems. More information: https://github.com/Hummer12007/brightnessctl.

• List devices with changeable brightness:
   
  brightnessctl --list
   
• Print the current brightness of the display backlight:
   
  brightnessctl get
   
• Set the brightness of the display backlight to a specified percentage within range:
   
  brightnessctl set {{50%}}
   
• Increase brightness by a specified increment:
   
  brightnessctl set {{+10%}}
   
• Decrease brightness by a specified decrement:
   
  brightnessctl set {{-10%}}