Verifying backups

Kevin Korb kmk at
Wed Sep 30 22:45:35 UTC 2015

Hash: SHA1

Just add --itemize-changes and --checksum to what you were doing
before and know that it will take a long time.

On 09/30/2015 06:42 PM, Ronald F. Guilmette wrote:
> Kevin Korb <kmk at>,
> I thank you greatly for your attempts to educate me, however as we
> get deeper into discussing more and more different rsync options, I
> feel that I am actually just getting more confused and frustrated.
> I've been sitting here, trying all sorts of different combinations
> and permutations of the various options we've discussed, and that
> you've told me about, but so far none of the combinations is
> producing the (seemingly simple) effect that I wanted.
> So, at the risk of trying your patience, may I please request that
> we begin again.  Let's start from scratch, and perhaps you can
> guide me to the simplest possible solution to the problem I first
> came here with... hopefully a solution which is so simple that even
> *I* can't screw it up.
> So, let's consider the following simple hypothetical example...
> We have two directories within the current directory.  They are
> named ./one/ and ./two/
> Within each of these two directories, there is a set of ordinary
> files. The set of filenames present within each of the two
> directories is identical.  Let's just say that each one contains
> the following three ordinary files:
> 001.jpg 002.jpg 003.jpg
> How may I use rsync to obtain a list of _just_ those files within
> these two directories that the cmp command would describe as being
> different between the two directories?  What is the exact command
> line I should use? (And within the output from the given command,
> what must I look for, exactly, that designates files that are
> different, as opposed to those whose content is the same?)
> Regards, rfg
> P.S.  I really do hope that I can get this to work with rsync.  I
> do prefer not reinventing the wheel, but it is starting to seem
> simpler to me if I were to just write a Perl script that would walk
> two directory hierarchies, in parallel, and just repeatedly invoke
> the cmp command on all of the regular files found therein.

- -- 
- -*~
	Kevin Korb			Phone:    (407) 252-6853
	Systems Administrator		Internet:
	FutureQuest, Inc.		Kevin at  (work)
	Orlando, Florida		kmk at (personal)
	Web page:
	PGP public key available on web site.
- -*~
Version: GnuPG v2


More information about the rsync mailing list