How can I dim the screen from Terminal?

Question

Is it possible to dim the screen from Terminal, in a Mac with OS X Lion? Is there any command to do control brightness and volume?

Answer 1

You can do it via an Applescript and run it as such:

Dimmer:

tell application "System Events"
        key code 107
    end tell

Brighter:

tell application "System Events"
        key code 113
    end tell

You can save these as .script files and then run them from the CLI like this:

osascript ~/Path/to/File

You can also do it this way, but that requires more setup.

Answer 2

You can change the volume in terminal with the command

osascript -e 'set volume 7'

Where 7 will set the volume to full.