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

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

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

deb http://archive.ubuntu.com/ubuntu bionic-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu bionic-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse