tldr/pages/linux/brightnessctl.md

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%-}}