I did this and but when i try to update i get this Err http://ppa.launchpad.net quantal/main Sources 404 Not FoundErr http://ppa.launchpad.net quantal/main amd64 Packages 404 Not FoundErr http://ppa.launchpad.net quantal/main i386 Packages 404 Not FoundIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enW: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/ubuntu/dists/quantal/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/ubuntu/dists/quantal/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/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.