How to add Extra Repositories

If you want to add more repositories for more packages, open the terminal and run "sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup" to backup your current sources.list. Then run "sudo gedit /etc/apt/sources.list" to have gedit open sources.list. If you have kubuntu, use kate instead of gedit.


Once open, remove everything and past the following lines in.

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

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

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

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

## PLF REPOSITORY (Unsupported. May contain illegal packages. Use at own risk.)
deb http://packages.freecontrib.org/ubuntu/plf dapper free non-free
deb-src http://packages.freecontrib.org/ubuntu/plf dapper free non-free

Press save and back in the terminal run "sudo apt-get update".