Debian 10.9.0 Buster - Official DLBD Source-1 20210327 12 43 (20210327)
These ISOs are useful for a completely offline Debian repository.
1. Use gpgv to verify the signed hashes available at https://cdimage.debian.org/debian-cd/current/source/jigdo-dlbd/
2. # mount /path/to/debian-10.9.0-source-DLBD-1.iso /mnt/srcdisk1
3. # mount /path/to/debian-10.9.0-source-DLBD-2.iso /mnt/srcdisk2