deb http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted universe deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted universe deb http://ports.ubuntu.com/ubuntu-ports/ xenial-updates main restricted universe deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial-updates main restricted universe deb http://ports.ubuntu.com/ubuntu-ports/ xenial-backports main restricted deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial-backports main restricted deb http://ports.ubuntu.com/ubuntu-ports/ xenial-security main restricted universe multiverse deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial-security main restricted universe multiverse