Hi all,

I have a problem with my "sudo apt-get update" command in ubuntu. I know a few things about using the terminal in general, but I don't know how to use the terminal for updating. For the record, when I use the software updater, it still gives the same problems. I tried googling extensively and I cannot find out how to solve my problems, so if someone can help me that would be great. Here is the end of the output after I type "sudo apt-get update" below.

Code:
W: Failed to fetch http://ppa.launchpad.net/ikarosdev/unity-revamped/ubuntu/dists/quantal/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/ikarosdev/unity-revamped/ubuntu/dists/quantal/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/ikarosdev/unity-revamped/ubuntu/dists/quantal/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.
I also noticed that when the code is running for updating, that there are a few error messages in the runnning lines of code. Maybe this can help.

Code:
Err http://ppa.launchpad.net quantal/main Sources
  404  Not Found
Err http://ppa.launchpad.net quantal/main amd64 Packages
  404  Not Found
Err http://ppa.launchpad.net quantal/main i386 Packages
  404  Not Found