Problem Updating Repo List in Ubuntu 12.10

The sources list has been changed to old-releases. To replace the sources list easily, use the following command:

sudo sed -i -e 's/archive.ubuntu.com\|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list

If you have choose another mirror then your sources list might contain us.archive.ubuntu.com, then the above changes would still be invalid. You would need to remove the us. from it. Using the command below will help remove it:

sudo sed -i -e 's/us.old-releases.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list