Linuxtrack installation issues

Question

When I perform a

$ sudo apt-get update

I have gotten the following errors:

W: Failed to fetch
http://www.linuxtrack.eu/repositories/ubuntu/dists/precise/main/source/Sources
404  Not Found

W: Failed to fetch
http://www.linuxtrack.eu/repositories/ubuntu/dists/precise/main/binary-amd64/Packages
404  Not Found

W: Failed to fetch
http://www.linuxtrack.eu/repositories/ubuntu/dists/precise/main/binary-i386/Packages
404  Not Found

E: Some index files failed to download. They have been ignored, or old
ones used instead.

Then I discovered (after simply trying to go to Linuxtrack.eu with my web browser) that Linuxtrack.eu currently redirects to https://github.com/uglyDwarf/linuxtrack . Down at the bottom of the page is a DOWNLOAD link: https://github.com/uglyDwarf/linuxtrack/wiki/Downloads .

This appears to be an archive or NEW repository for Linuxtrack.

For DEBIAN versions- such as Xubuntu 14.04, they give you the following link:

https://github.com/uglyDwarf/linuxtrack/wiki/New-Build-Linux-(Debian-based)

OK, so my question is, how do I make apt-get to stop looking for Linuxtrack.eu, and instead look at the correct website? I'm assuming that I would need to uninstall something.

Also, if I go into the Ubuntu Software Center, do a search for "Linuxtrack", it lists the software as a Metapackage, and even provides an install button. BUT, it also lists the developer website as

https://code.google.com/archive/p/linux-track/,

which if you click on it shows the following:

"Due to the comming shutdown of the Google code, the project was moved to the GitHub. The new project page is 
https://github.com/uglyDwarf/linuxtrack"

So I'm also assuming that Ubuntu's Launchpad ALSO needs to be updated so as to reflect the corrected links, etc.

How do I make apt-get look for the correct links?