Using apt tool in Ubuntu Server 12.04

By default after you install Ubuntu Server 12.04 'add-apt-repository' command won't be available so you can't add additional PPA repository address.

You should try following commands:

sudo apt-get install python-software-properties
sudo apt-get install software-properties-common

now you can add new repo address


example)

sudo add-apt-repository ppa:ubuntu-typicalreponame/ppa