How we Fix the APT repository errors Debian os Stretch (9)
You can try the archive repos, like this:
deb [trusted=yes] http://archive.debian.org/debian/ stretch main non-free contrib
deb-src [trusted=yes] http://archive.debian.org/debian/ stretch main non-free contrib
deb [trusted=yes] http://archive.debian.org/debian-security/ stretch/updates main non-free contrib
You can try the archive repos, like this:
deb [trusted=yes] http://archive.debian.org/debian/ stretch main non-free contrib deb-src [trusted=yes] http://archive.debian.org/debian/ stretch main non-free contrib deb [trusted=yes] http://archive.debian.org/debian-security/ stretch/updates main non-free contrib