deb http://miroir-debian/debian/ buster main
deb-src http://ftp.fr.debian.org/debian buster main

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

deb http://miroir-debian/debian buster-updates main
deb-src http://ftp.fr.debian.org/debian buster-updates main