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tldr/pages/linux/brightnessctl.md

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# brightnessctl
> Utility for reading and controlling device brightness for Linux operating systems.
> More information: <https://github.com/Hummer12007/brightnessctl#usage>.
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- List devices with changeable brightness:
`brightnessctl {{[-l|--list]}}`
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- 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%-}}`