deb http://http.us.debian.org/debian buster main
deb-src http://http.us.debian.org/debian buster main

deb http://security.debian.org/ buster/updates main
deb-src http://security.debian.org/ buster/updates main

deb http://http.us.debian.org/debian buster-updates main
deb-src http://http.us.debian.org/debian buster-updates main

deb http://http.debian.net/debian buster-backports main
deb-src http://http.debian.net/debian buster-backports main