Medibuntu (Multimedia, Entertainment & Distractions In Ubuntu) is a repository of packages that cannot be included into the Ubuntu distribution for legal reasons (copyright, license, patent, etc).
Below are the instructions to add the Medibuntu repository to your system’s list of APT repositories. These are commands that should be run in the Terminal (Applications -> Accessories -> Terminal).
For Any Ubuntu Release and Keyring:
sudo wget http://www.medibuntu.org/sources.list.d/`lsb_release -cs`.list –output-document=/etc/apt/sources.list.d/medibuntu.list && sudo apt-get -q update && sudo apt-get –yes -q –allow-unauthenticated install medibuntu-keyring && sudo apt-get -q update
Ubuntu 9.04 “Jaunty Jackalope“:
sudo wget http://www.medibuntu.org/sources.list.d/jaunty.list –output-document=/etc/apt/sources.list.d/medibuntu.list