Medibuntu (Multimedia, Entertainment & Distractions In Ubuntu) is a repository of packages that cannot be included into the Ubuntu distribution for legal reasons (copyright, license, patent, etc).
Just when I was about to publish the 'What To Do After A Fresh Ubuntu Install Script - New Version Released' post, I noticed that the Medibuntu main server is down. So I search for some mirrors.
Note: medibuntu.org is working, just packages.medibuntu.org is not
I fixed this in the script by adding 3 mirrors, but here is how to manually fix it:
Press ALT + F2 and enter:
Then search for the lines which point to the main Medibuntu repository, which should look something like this:
gksu gedit /etc/apt/sources.list
Then search for the lines which point to the main Medibuntu repository, which should look something like this:
deb http://packages.medibuntu.org/ lucid free non-free
deb-src http://packages.medibuntu.org/ lucid free non-free
Of course, if you're not using Lucid, it's going to say 'karmic' or 'jaunty', etc.
Replace these 2 lines with any of these 3 mirrors:
Mirror 1:
deb http://mirrors.ucr.ac.cr/medibuntu/ lucid free non-free
deb-src http://mirrors.ucr.ac.cr/medibuntu/ lucid free non-free
Mirror 2:
deb http://mirror.oscc.org.my/medibuntu/ lucid free non-free
deb-src http://mirror.oscc.org.my/medibuntu/ lucid free non-free
Mirror 3:
deb ftp://ftp.leg.uct.ac.za/pub/linux/medibuntu/ lucid free non-free
deb-src ftp://ftp.leg.uct.ac.za/pub/linux/medibuntu/ lucid free non-free
If you're not using Lucid, replace 'lucid' in the above lines with 'karmic', 'jaunty' or whatever Ubuntu version you're using.
Then save the file and do an update to your sources.list:
sudo apt-get update