ybacklight

Manage screen backlight brightness. See also xbacklight. More information: https://github.com/pixelcmtd/ybacklight.

• Print current brightness and maximal brightness, shortened and separated by a slash:

ybacklight Sc/Sm

• Specify the brightness:

ybacklight s{{420}}

• Increase the brightness by 42 big steps (4200 by default):

ybacklight Si42

• Decrease the brightness by 300:

ybacklight d300