deb http://it.archive.ubuntu.com/ubuntu/ vivid main universe restricted multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ vivid main universe restricted multiverse

deb http://security.ubuntu.com/ubuntu vivid-security main universe restricted multiverse
deb-src http://security.ubuntu.com/ubuntu vivid-security main universe restricted multiverse

deb http://it.archive.ubuntu.com/ubuntu/ vivid-updates main universe restricted multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ vivid-updates main universe restricted multiverse

deb http://it.archive.ubuntu.com/ubuntu vivid-backports main restricted universe multiverse
deb-src http://it.archive.ubuntu.com/ubuntu vivid-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu vivid partner
deb-src http://archive.canonical.com/ubuntu vivid partner