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brightnessctl

Utility for reading and controlling device brightness for GNU/Linux operating systems.

More information.

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%}

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