deb http://it.archive.ubuntu.com/ubuntu/~~V~~singular~~3rd fidato principale universo limitato multiverse

deb http://security.ubuntu.com/ubuntu~~V~~singular~~3rd universo principale fidato-sterili multiverso

deb http://it.archive.ubuntu.com/ubuntu/~~V~~singular~~3rd fidato-updates universo principale limitati multiverse

deb http://it.archive.ubuntu.com/ubuntu~~V~~singular~~3rd fidato-backport principale multiverse universo limitato

deb http://archive.canonical.com/ubuntu socio fidato