You do not have the full path for the repository you added. It must tell your repository what version of Ubuntu you want to upgrade. The correct path for the ppa should look something like:
There may or may not be more slashes and other punctuation in the ppa call.
http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu precise main binary-amd64
Also, your apt-get line is messed up badly for execution. It should read:
You may also use apt-get for the entire line, as such:
sudo apt-get update && sudo apt-get install aptitude && sudo aptitude update && sudo aptitude dist-upgrade
Also, did you do a ppa-install? Or did you at least download and install the GPG key for the repository? If you don't know what I am talking about in the last two questions, you should spend a LOT of time reading up about ppa repositories before you attempt to install another, or follow directions exactly.
sudo apt-get update && sudo apt-get dist-upgrade