1 deb http://us.archive.ubuntu.com/ubuntu/ bionic main universe
2 deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe
3 deb http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe
4 deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main universe
5 deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe
6 deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe