If you do not know how hardlink works, do not follow this tutorial.
We use this method when duplicate files are kind of “read-only”. Because if you replace 2 duplicate files with hardlink pointing to common storage, editing one will change others content. If this is fine, then you can go ahead.
Don’t worry about deletion. Deleting one file won’t delete other file.
Install fdupes 1.51
Ubutnu 12.04 has repo has older version. So follow this:
git clone https://github.com/tobiasschulz/fdupes cd fdupes make fdupes su root make install
Find duplicate files…
fdupes -r /path/to/dir
Find duplicate files and replace with hardlinks
fdupes -rL /path/to/dir
-L option which is responsible for replacing duplicate with hardlinks.