deb http://deb.debian.org/debian bullseye main deb-src http://deb.debian.org/debian bullseye main deb http://security.debian.org/debian-security bullseye-security main deb-src http://security.debian.org/debian-security bullseye-security main deb http://deb.debian.org/debian bullseye-updates main deb-src http://deb.debian.org/debian bullseye-updates main #deb http://deb.debian.org/debian bullseye-backports main contrib non-free