deb [arch=amd64] http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
deb [arch=armhf] http://ports.ubuntu.com/ubuntu-ports xenial main restricted universe multiverse
deb [arch=amd64] http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
deb [arch=armhf] http://ports.ubuntu.com/ubuntu-ports xenial-updates main restricted universe multiverse
deb [arch=amd64] http://security.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb [arch=armhf] http://ports.ubuntu.com/ubuntu-ports xenial-security main restricted universe multiverse