True, but the problem is you have to remember which folder was last
used.. I currently use a similar setup to sync my home directory on my
laptop and desktop, but I can modify one of the two at a time, and keep
any of a changes, as the next rsync makes sure that /A matches what /B
has, without checking which is newer.

Thus the question is, can rsync, or something else, check which is newer, and use that file, rather than just saying /A is the source, and /B is the destination? I'd love to know a better solution!

On Tue, 2002-12-17 at 20:58, Matt Alexander wrote:
> On Tue, 17 Dec 2002, Kurt Granroth wrote:
> 
> > Does anybody know of a tool that will keep two directories totally in sync
> > but not in real-time?  Basically, I want to have two directories /A and /B
> > that every time they are synced (maybe once an hour), they will be
> > identical.  Changes can happen on either /A or /B.
> 
> Hmm...  so if /A/myfile is modified and then 5 minutes later, /B/myfile is
> modified, which myfile would you choose to keep?  I think the only way to
> go both ways is if you don't modify the same files in each directory.  In
> which case, you could use rsync.
> 
> > Now rsync is great for one-way updates.  If, say, all changes are only done
> > to /A than rsync is perfect for keeping /B in sync.  However, if you start
> > deleting files, then rsync doesn't know what to keep and what to delete.
> 
> rsync can handle deleted files with the --delete option.  If /A/myfile was
> deleted, then when you ran rsync going from /A to /B, then /B/myfile would
> be removed.  Likewise for any files deleted from /B when going from /B to
> /A.
> ~M
> 
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-- 
--Eric Andresen
  ndiin@asu.edu