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

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 should look at the development version below.
Development Version

Here you may download the latest development version of fdupes. This version is subject to change and should therefore be considered unstable. Generally speaking, if you wish to contribute code it is preferred that you start with this version.