How to add extra repositories

• You can also add extra repositories using the Synaptic Package Manager. New users may find it more user-friendly to add extra repositories through the Package Manager. If you follow the link above, you do not have to follow the rest of this tip.

sudo cp -p /etc/apt/sources.list /etc/apt/sources.list_backup
sudo gedit /etc/apt/sources.list

• Replace everything with the following lines

To use your local mirror you can add "cc." before archive.ubuntu.com (cc = your country code)

e.g. deb http://lv.archive.ubuntu.com/ubuntu edgy main restricted universe multiverse

## Add comments (##) in front of any line to remove it from being checked.  
## Use the following sources.list at your own risk. 

deb http://archive.ubuntu.com/ubuntu edgy main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu edgy main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu edgy-proposed main restricted universe multiverse

## MAJOR BUG FIX UPDATES produced after the final release
deb http://archive.ubuntu.com/ubuntu edgy-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu edgy-updates main restricted universe multiverse

## UBUNTU SECURITY UPDATES
deb http://security.ubuntu.com/ubuntu edgy-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu edgy-security main restricted universe multiverse

## BACKPORTS REPOSITORY (Unsupported.  May contain illegal packages.  Use at own risk.)
deb http://archive.ubuntu.com/ubuntu edgy-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu edgy-backports main restricted universe multiverse

## PLF REPOSITORY (Unsupported.  May contain illegal packages.  Use at own risk.)
deb http://medibuntu.sos-sts.com/repo/ edgy free
deb http://medibuntu.sos-sts.com/repo/ edgy non-free
deb-src http://medibuntu.sos-sts.com/repo/ edgy free
deb-src http://medibuntu.sos-sts.com/repo/ edgy non-free
                                                                                                                                       
## CANONICAL COMMERCIAL REPOSITORY (Hosted on Canonical servers, not Ubuntu
## servers. RealPlayer10, Opera, DesktopSecure and more to come.)
deb http://archive.canonical.com/ubuntu edgy-commercial main

## Listen
#deb http://theli.free.fr/packages/ edgy listen

• Save the edited file

wget -q http://medibuntu.sos-sts.com/repo/medibuntu-key.gpg -O- | sudo apt-key add -
sudo aptitude update