Byte Sized Hacks: Set Screen Brightness from Terminal using xbacklight(Ubuntu 16.04 LTS)
Found a pretty neat solution for changing screen brightness from terminal. Just open up, your terminal (ctrl+alt+t) and then type
xbacklight -set 100
It will set your screen brightness to 100%. You can set any value ranging from 0 to 100. If you don’t have xbacklight package pre-installed then fetch it using the apt:
sudo apt update
sudo apt install xbacklight
There you go! Now you can use xbacklight from terminal. Simple! isn’t it?
Note: I have tested it on Ubuntu 16.04 LTS. But, it should work on other Linux distributions as well. Also, don’t hesitate to suggest/comment other ways to change brightness that you prefer(if there any) !