On Mon, 19 Sep 2016 17:23:39 -0600
Chris Murphy <li...@colorremedies.com> wrote:

> Drives A and B have many overlapping files but I want to find out what
> files don't exist on each. Thwarting this is directory structure
> differs between the two drives, and I'm fairly certain some of the
> file names differ on the two drives also.
> Therefore I need something hash based. I started with this:
> $ find /brickA -type f -exec md5sum "{}" + > brickA.txt
> $ find /brickB -type f -exec md5sum "{}" + > brickB.txt
> What I need next is to:
> Make a copy of the files, brickAcopy.txt and brickBcopy.txt
> Loop: Extract each md5sum in brickA.txt, grep for it in brickAcopy.txt
> and brickBcopy.txt, and if it's found in both, delete the line in both
> files.
> What remains in each file are paths to files that don't exist on the
> other drive. This must be a solved problem, so I'm open to alternative
> approaches.

> Ideas?
Here's some linux utilities a quick search turned up.

At least fslint and fdupes are in the fedora repositories, maybe others.
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