A powerful duplicate file finder and an enhanced fork of fdupes. More information: https://codeberg.org/jbruchon/jdupes.
jdupes path/to/directory
jdupes directory1 directory2
jdupes --recurse path/to/directory
jdupes --delete --recurse path/to/directory
jdupes directory1 --recurse: directory2
jdupes -O directory1 directory2 directory3