deb http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted universe multiverse