Debian 10 (Buster) -- Full sources.list

sources.list

deb http://deb.debian.org/debian buster main contrib non-free
deb-src http://deb.debian.org/debian buster main contrib non-free

deb http://deb.debian.org/debian buster-updates main contrib non-free
deb-src http://deb.debian.org/debian buster-updates main contrib non-free

deb http://security.debian.org/debian-security/ buster/updates main contrib non-free
deb-src http://security.debian.org/debian-security/ buster/updates main contrib non-free

Also pro tip:

wget https://deb.freexian.com/extended-lts/pool/main/f/freexian-archive-keyring/freexian-archive-keyring_2022.06.08_all.deb
sudo dpkg -i freexian-archive-keyring_2022.06.08_all.deb

# Freexian Extended LTS (security updates + all packages)
deb http://deb.freexian.com/extended-lts buster main contrib non-free

It's working

deb http://archive.debian.org/debian/ buster main contrib non-free
deb http://archive.debian.org/debian/ buster-updates main contrib non-free
deb http://archive.debian.org/debian-security buster/updates main contrib non-free
deb http://archive.debian.org/debian/ buster-backports main contrib non-free

I just copied pasted BOJILIJEBNIK's sources post into my .list and I'm fixed right up ;~)

Thanks to you all, these are the working ones (October 19-2025)

deb http://archive.debian.org/debian/ buster main contrib non-free
deb http://archive.debian.org/debian/ buster-updates main contrib non-free
deb http://archive.debian.org/debian-security buster/updates main contrib non-free
deb http://archive.debian.org/debian/ buster-backports main contrib non-free