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

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

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

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