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
• Set the brightness to 420:
  ybacklight s{{420}}
• Increase the brightness by 42 big steps (4200 by default):
  ybacklight Si{{42}}
• Decrease the brightness by 300:
  ybacklight d{{300}}