[Breezy] Backups to USB Disk

[Magnus Therning]

On Mon, Dec 05, 2005 at 09:27:14PM -0800, Ed Fletcher wrote:
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>Hi All:
>
>I'm trying to figure out how to make backups of a directory to an
>external usb disk.  So that any new files in the directory will be
>copied to the external disk when it's attached.  All by itself, that's
>not too difficult.  But I also want to be able to add files to the disk
>when it's plugged into a laptop and have them get copied over when it is
>plugged back into the desktop computer.  That would give me two
>independent sets of data that is usually in sync (or very close).  And,
>as an added bonus, the extra security of having one copy (on the usb
>disk) spend most of it's time physically separated from the other copy.
>
>I've been reading up on rsync and backup software.  rsync is intended
>for two computers, so I don't think that will work for me.  Backup
>software seems to be a one way solution.  I'm thinking something like
>synctree, but that will alter one tree to look like the other and will
>delete files to do that.  So synctree isn't bidirectional either.
>
>I'm sure that this can be done, but I'm at a loss for a solution.
>Anyone able to point me in the right direction?

It might be worth looking at unison. I use it to synchronise quite a few
things between different machines. It synchronises two dirs rather than
mirroring one dir into another.

/M

-- 
Magnus Therning                    (OpenPGP: 0xAB4DFBA4)
magnus at therning.org
http://therning.org/magnus

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