debian bullseye sources.list security code example
Example: debian bullseye sources.list security
deb http://deb.debian.org/debian bullseye main contrib non-free
deb http://security.debian.org/ bullseye-security main contrib non-free
deb http://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb http://deb.debian.org/debian bullseye-proposed-updates main contrib non-free
deb-src http://deb.debian.org/debian bullseye-proposed-updates main contrib non-free