Debian 10 стандартные репозитории
deb http://ftp.debian.org/debian buster main contrib non-free
deb-src http://ftp.debian.org/debian buster main contrib non-free
deb http://ftp.debian.org/debian buster-updates main contrib non-free
deb-src http://ftp.debian.org/debian buster-updates main contrib non-free
deb http://security.debian.org/ buster/updates main contrib non-free
deb-src http://security.debian.org/ buster/updates main contrib non-free
deb http://ftp.debian.org/debian buster-backports main contrib non-free