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I am looking for tool, script etc to hard link (or something equivalent) files with the purpose of saving space.

(Going through files, finding duplicates and hard-linking them in).

Will also then pure analysis - to find "duplicates", and see which ones are actually the same physical files.

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  • Safe, yes, as the actual file will not be deleted until all hard-links are deleted. iPhoto/Photos Library is one example of where this is already done. As to automated, sorry, I've no idea. – Tetsujin Jan 9 '16 at 11:12
  • Time Machine works EXACTLY like this. OS X is even able to hardlink directories. – bot47 Jan 9 '16 at 11:45
  • I've removed the opinion-based part of your question. Also it might help to know a bit more about your specific needs (and the files you are looking at). Optimizing space usage in a standard OS X installation is probably not worth the trouble, are you looking at some specific user-generated files? – nohillside Jan 9 '16 at 11:54
  • we have duplicates between iPhoto and the new thing (Photos?). – Olav Jan 9 '16 at 12:20
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    When you migrate your photo library from iPhoto/Aperture to Photos, the image files automatically get hard-linked into the new library (so they don't take up more space than before). This of course does not apply to images you add to both libraries after the migration. – nohillside Jan 10 '16 at 10:08

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