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