Debian 11 стандартные репозитории
deb http://ftp.debian.org/debian bullseye main contrib non-free
deb-src http://ftp.debian.org/debian bullseye main contrib non-free
deb http://ftp.debian.org/debian bullseye-updates main contrib non-free
deb-src http://ftp.debian.org/debian bullseye-updates main contrib non-free
deb http://security.debian.org/ bullseye/updates main contrib non-free
deb-src http://security.debian.org/ bullseye/updates main contrib non-free
deb http://ftp.debian.org/debian bullseye-backports main contrib non-free