> What I am curious about is if there is a way to achieve this without
> maintaining two copies of the files. Is there any way to run rsync
> against a fileset where rsync will produce a checksum or something
for
> those files and can then later determine what files have changed
without
> maintaining a second copy of those files?
>
> I realize rsync is primarily a backup tool (and a great one!) and
this
> probably falls outside of its purview.
man md5sum
Initially (With filenames that (may) contain spaces):
find * -type f -printf %p\\0 | xargs -0 md5sum > md5
Without filenames that contain spaces it's a little shorter:
find * -type f | xargs md5sum > md5
Then you have a file with an md5sum of all files
And to later check what files have changed:
md5sum -c md5
That's it.
You may also be interested in fingerprint :
http://connect.homeunix.com/lbackup/developer/data_verification
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