Contents of /etc/apt/sources.list for Ubuntu 12.04 Precise Pangolin

sources.list

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/main/binary-i386/

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ precise main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://old-releases.ubuntu.com/ubuntu precise main restricted
deb-src http://old-releases.ubuntu.com/ubuntu precise main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://old-releases.ubuntu.com/ubuntu precise-updates main restricted
deb-src http://old-releases.ubuntu.com/ubuntu precise-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://old-releases.ubuntu.com/ubuntu precise universe
deb-src http://old-releases.ubuntu.com/ubuntu precise universe
deb http://old-releases.ubuntu.com/ubuntu precise-updates universe
deb-src http://old-releases.ubuntu.com/ubuntu precise-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://old-releases.ubuntu.com/ubuntu precise multiverse
deb-src http://old-releases.ubuntu.com/ubuntu precise multiverse
deb http://old-releases.ubuntu.com/ubuntu precise-updates multiverse
deb-src http://old-releases.ubuntu.com/ubuntu precise-updates multiverse

## 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://old-releases.ubuntu.com/ubuntu precise-backports main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu precise-backports main restricted universe multiverse

deb http://old-releases.ubuntu.com/ubuntu precise-security main restricted
deb-src http://old-releases.ubuntu.com/ubuntu precise-security main restricted
deb http://old-releases.ubuntu.com/ubuntu precise-security universe
deb-src http://old-releases.ubuntu.com/ubuntu precise-security universe
deb http://old-releases.ubuntu.com/ubuntu precise-security multiverse
deb-src http://old-releases.ubuntu.com/ubuntu precise-security 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 precise partner
deb-src http://archive.canonical.com/ubuntu precise partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
deb http://ppa.launchpad.net/zarquon42/meshlab/ubuntu precise main
deb-src http://ppa.launchpad.net/zarquon42/meshlab/ubuntu precise main
deb http://ppa.launchpad.net/webupd8team/sublime-text-2/ubuntu precise main
deb-src http://ppa.launchpad.net/webupd8team/sublime-text-2/ubuntu precise main
deb http://ppa.launchpad.net/tiheum/equinox/ubuntu precise main
deb-src http://ppa.launchpad.net/tiheum/equinox/ubuntu precise main
deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu precise main
deb-src http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu precise main
deb http://ppa.launchpad.net/chris-lea/python-django/ubuntu precise main
deb-src http://ppa.launchpad.net/chris-lea/python-django/ubuntu precise main

To fully utilize the above file, I would do this on an Ubuntu 12.04 system:

sudo wget -O /etc/apt/sources.list https://gist.githubusercontent.com/frakman1/35dac1e27458b8d577f399dfa551e2ad/raw/f22c11b6cb6936979cc8f297eab2c5a26d89b095/sources.list
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 16126D3A3E5C1192 7F0BB3BE5BF00518 C2518248EEA14886 464AD83D4631BBEA 089EBE08314DF160 B9316A7BC7917B12
sudo apt-get update

I also had to run sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EB9B1D8886F44E2A