[How To] Add extra repositories in Ubuntu 7.04

Using Menus

Choose distribution-friendly repositories. These are part of the Ubuntu distribution system. This is the recommended method.

System-->Administration-->Software Sources

Check the repositories you think you will need (main, universe, restricted, multiverse). You probably won’t need the ‘sources’ repository.

Add any third-party repositories. Such repositories are not monitored in any way. Some are quite popular, however. Use any third-party repository at your own risk.

System-->Administration-->Software Sources-->Third-party software-->Add

Add the name of your repository. In this example, we will use Medibuntu, a popular third-party repository not affiliated with Ubuntu in any way.

APT line: deb http://packages.medibuntu.org/ feisty free non-free

Download any needed gpg keys and add them to the keylist. This key verifies the repository to your system. The Medibuntu repository (not affiliated with Ubuntu) example is shown:

wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add -

Manually edit sources.list

Manual updates are at your own risk. Mixing incompatible repositories can break your system.

Create a backup of your current list of sources, overwriting any previous backup.

sudo cp -i /etc/apt/sources.list /etc/apt/sources.list_backup

Use a text editor (gedit or nano) to edit the sources list:

gksudo gedit /etc/apt/sources.list

Edit the repositories in the sources.list similar to this template:

To use your local mirror you can add “cc.” before archive.ubuntu.com, where cc = your country code

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

## See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
## newer versions of the distribution.

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

## Uncomment deb-src if you wish to download the source packages

## If you have a install CD you can add it to the reposity using 'apt-cdrom add'
## which will add a line similar to the following:
#deb cdrom:[Ubuntu 7.04 _Feisty Fawn_ - Beta i386 (20070322.1)]/ feisty main restricted
deb http://us.archive.ubuntu.com/ubuntu/ feisty main restricted
#deb-src http://us.archive.ubuntu.com/ubuntu/ feisty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ feisty-updates main restricted
#deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://us.archive.ubuntu.com/ubuntu/ feisty universe
#deb-src http://us.archive.ubuntu.com/ubuntu/ feisty universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ feisty multiverse
#deb-src http://us.archive.ubuntu.com/ubuntu/ feisty multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
#deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu feisty-security main restricted
#deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted
deb http://security.ubuntu.com/ubuntu feisty-security universe
#deb-src http://security.ubuntu.com/ubuntu feisty-security universe
deb http://security.ubuntu.com/ubuntu feisty-security multiverse
#deb-src http://security.ubuntu.com/ubuntu feisty-security multiverse

## PLF REPOSITORY (Unsupported.  May contain illegal packages.  Use at own risk.)
## Medibuntu - Ubuntu 7.04 "feisty fawn"
## Please report any bug on https://launchpad.net/products/medibuntu/+bugs
deb http://packages.medibuntu.org/ feisty free non-free
#deb-src http://medibuntu.sos-sts.com/repo/ feisty free 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 feisty-commercial main

## enlightenment e17 beta, use at your own risk
## E17 is in Beta and may break or break your system
#deb http://edevelop.org/pkg-e/ubuntu feisty e17
#deb http://e17.dunnewind.net/ubuntu feisty e17
#deb-src http://edevelop.org/pkg-e/ubuntu feisty e17

Download any needed gpg keys and add them to the keylist. The Medibuntu repository (not affiliated with Ubuntu) example is shown:

wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add -

Here is another example using the Enlightenment repository (not affiliated with Ubuntu):

wget -q http://lut1n.ifrance.com/repo_key.asc -O- | sudo apt-key add -

Refresh packages list:

sudo apt-get update

Other third-party repositories are listed at: http://www.ubuntulinux.nl/source-o-matic or http://3v1n0.tuxfamily.org/blog/lista-repository-sourceslist-ottimizzata-per-ubuntu-kubuntu-linux/