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syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# brightnessctl

> Utility for reading and controlling device brightness for 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%-}}`
