Im Laufe der Zeit habe ich für mein Ubuntu immer neuere Paketquellen zusammengetragen, um die aktuellste Software nutzen zu können. Folgende Paketquellen haben sich im Laufe der Zeit angesammelt:

Medibuntu

Für bestimmte Multimedia-Aufgaben empfiehlt es sich die Medibuntu Quellen zu implementieren. Wie das funktioniert steht im Medibuntu APT Repository How-To.

Auszug /etc/apt/sources.list:

# deb cdrom:[Ubuntu 9.04 _jaunty Jackalope_ - Release amd64 (20090420.1)]/ jaunty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://de.archive.ubuntu.com/ubuntu/ karmic main restricted
deb-src http://de.archive.ubuntu.com/ubuntu/ karmic main restricted

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

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://de.archive.ubuntu.com/ubuntu/ karmic universe
deb-src http://de.archive.ubuntu.com/ubuntu/ karmic universe
deb http://de.archive.ubuntu.com/ubuntu/ karmic-updates universe
deb-src http://de.archive.ubuntu.com/ubuntu/ karmic-updates 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://de.archive.ubuntu.com/ubuntu/ karmic multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ karmic multiverse
deb http://de.archive.ubuntu.com/ubuntu/ karmic-updates multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ karmic-updates multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu karmic partner
deb-src http://archive.canonical.com/ubuntu karmic partner

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

# Ubuntu Daily Repository
## installieren mit: sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa
deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main

# Opera, aktuelle Version
## Key installieren mit: wget -O - http://deb.opera.com/archive.key | sudo apt-key add -
deb http://deb.opera.com/opera/ stable non-free

# SUN Virtualbox
## Keyfile: http://download.virtualbox.org/virtualbox/debian/sun_vbox.asc
deb http://download.virtualbox.org/virtualbox/debian karmic non-free

# Google software repository
## Keyfile: https://dl-ssl.google.com/linux/linux_signing_key.pub
deb http://dl.google.com/linux/deb/ stable non-free main

# Medibuntu
## Please report any bug on https://bugs.launchpad.net/medibuntu/
## Keyring installieren mit: sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring
deb http://packages.medibuntu.org/ karmic free non-free
deb-src http://packages.medibuntu.org/ karmic free non-free

# Dropbox
deb http://linux.dropbox.com/ubuntu karmic main