sources.list.12

deb http://debian.ethz.ch/debian/ bookworm main contrib non-free non-free-firmware
deb-src http://debian.ethz.ch/debian/ bookworm main contrib non-free non-free-firmware
deb http://security.debian.org/debian-security bookworm-security main
deb-src http://security.debian.org/debian-security bookworm-security main
# bookworm-updates, to get updates before a point release is made;
# see https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_updates_and_backports
deb http://debian.ethz.ch/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src http://debian.ethz.ch/debian/ bookworm-updates main contrib non-free non-free-firmware
# if you want backports
# deb http://deb.debian.org/debian bookworm-backports main contrib non-free