### apt install apt-transport-https ###
deb https://deb.debian.org/debian/ bullseye main contrib non-free
#deb-src https://deb.debian.org/debian/ bullseye main contrib non-free
deb https://deb.debian.org/debian/ bullseye-updates main contrib non-free
#deb-src https://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb https://deb.debian.org/debian/ bullseye-proposed-updates main contrib non-free
#deb-src https://deb.debian.org/debian/ bullseye-proposed-updates main contrib non-free
# security
deb https://security.debian.org/debian-security bullseye-security main contrib non-free
# backports
deb https://deb.debian.org/debian bullseye-backports main contrib non-free
