This is a simple tips to adjust the monitor backlight from command line in linux. This is very useful in portable devices like Laptop and Netbooks to conserve power.
Here I am using Ubuntu 10.10 Beta. You need xbacklight command to control the backlight.
How to install xbacklight?
$ sudo apt-get install xbacklight
How to use xbacklight?
To set maximum brightness: $ xbacklight -set 100
To set 60% brightness: $ xbacklight -set 60
To set lowest brightness: $ xbacklight -set 0