You can rsync back over the same data, and only the changes will be brought over. If you're looking for an incremental backup sort of a deal, use the --backup-dir option, which will save changed files over to a new directory, so you can reach back in history. The ability to roll the filesystem back to a specific data, including not having things there that were added later, is a bit stickier, but there are professional packages to handle that. ADSM(tradename has been changed to "TSM" now) is particularly sweet in that regard, and I hear the Veritas NetBackup is nice, too.
Tim Conway Unix System Administration Contractor - IBM Global Services [EMAIL PROTECTED] -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html