FDUPES is a program for identifying or deleting duplicate files residing
within specified directories.

The current version of fdupes is distributed as fdupes-1.40.tar.gz. No
later version has been officially released. Users should get this version,
as it's presumably the most reliable. Developers and beta testers should
look at the versions below.

http://netdial.caribe.net/~adrian2/fdupes.html