Jack McKinney writes:
> Big Brother tells me that Christian Rehn wrote:
> > Joseph Schlecht writes:
> >
> > I use catchup (http://www.cse.unsw.edu.au/~neilb/oss/catchup/) to
> > synchronize my home on the laptop with my home on the PC at work.
> > This allows me to modify files on both homes and later synchronize
> > them. Instead of just deleting the old version of a file catchup may
> > also save the old file in a special directory. If the same file is
> > modified on both computers catchup does not overwrite the
> > modifications but renames one by adding the extension .alt so you can
> > solve the conflict manually.
> >
> > You may also use rsync or rdist but this allows you only to propagate
> > modifications from one PC to another without the advantages of
> > catchup.
>
> Actually, rsync does have options to save files instead of deleting
> them by backing them up to special directory or by adding an extension
> to them.
That's right, you can avoid the deletion of files but rsync does only
work in one direction. Assume you modify file x on host A and file y
on host B. If you rsync from A to B you would only get x on host B
and nothing on A, if you rsync from B to A you get y on host A but not
x on B.
Catchup compares md5 checksums and modification times and if you
"catchup A and B" you wold get a copy of x on host B and a copy of y
on host A. This is the advantage of catchup I mentioned.
Cheers,
Christian
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