deb http://it.archive.ubuntu.com/ubuntu/ artful main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu artful-security main universe restricted multiverse
deb http://it.archive.ubuntu.com/ubuntu/ artful-updates main universe restricted multiverse

# deb http://it.archive.ubuntu.com/ubuntu artful-backports main restricted universe multiverse
# deb http://archive.canonical.com/ubuntu artful partner