Hello, I have the latest stable release of a UNIX-like O.S. in the ISO format, and want to synchronize it with the latest Release Candidate (RC) of it, in order to reducing bandwidth usage. The ISO images for that O.S. is provided via different protocols including rsync, FTP and HTTP
I don't think you can really synchronize them at the disk-image level, just the file level. You'd have to convince someone to mount that ISO so you can run rsync against it.