datahoarder
Who are we?
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
We are one. We are legion. And we're trying really hard not to forget.
-- 5-4-3-2-1-bang from this thread
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I personally use rdfind as it has an option to replace duplicates with hardlinks instead of deleting them outright (if on the same filesystem). This is useful if you do still need a file to exist at multiple paths.
I then use Czkawka for everything else, especially for similar, non-duplicate files.
Ooh, that's smart! Thanks for the recommendation.