deb http://deb.debian.org/debian bullseye main contrib non-free
deb http://security.debian.org/debian-security bullseye-security main contrib non-free

# bullseye-updates, previously known as 'volatile'
deb http://deb.debian.org/debian bullseye-updates main contrib non-free

# bullseye-backports, previously on backports.debian.org
deb http://deb.debian.org/debian bullseye-backports main contrib non-free
