Jan Danielsson wrote:
>    I decided to write a tool which calculates md5 sums on a block basis.
> What I want to do next is simply run the script on both computers to
> generate md5 files. Then check which blocks differ, transmit them, and
> store them in the proper places within the backup-image.

>    Is there a tool which can "synchronize" two files over an ssh tunnel
> (except unison, that is)?

I think that's what rsync does.

-- 
Christian