fdupes

Finds duplicate files in a set of directories. More information: https://github.com/adrianlopezroche/fdupes.

fdupes path/to/directory

fdupes directory1 directory2

fdupes -r path/to/directory

fdupes directory1 -R directory2

fdupes -rH path/to/directory

fdupes -rd path/to/directory

fdupes -rdN path/to/directory