Re: question: does "diff" use short cuts?

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On Fri, 2023-07-07 at 19:11 -0600, home user wrote:
> What I back up is a mix of binary and text files.  I understand that
> "diff" is not the best for binary files, but "cmp" does not have a
> recursive option.  "rsync" does copying.  I don't see how that
> command (including with the "--dry-run" option) will verify the back-
> up.

'rsync --dry-run' will tell you if it thinks some files need to be
copied because they have changed. If you do this after your backup
procedure, then you'll be checking that it worked correctly.

You can of course *also* use rsync to do the actual backup (and IMHO it
would be preferable to 'diff'), but that's not what I mean here.

poc
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