fdupes

fdupes
Original author	Adrián López
Release	25 December 1999 (1999-12-25)
Stable release	2.4.0 / 30 March 2025 (30 March 2025)
Written in	C
Operating system	Linux, macOS
Available in	English
Repository	github.com/adrianlopezroche/fdupes

fdupes is a program written by Adrián López to scan directories for duplicate files, with options to list, delete or replace the files with hardlinks pointing to the duplicate. It first compares file sizes, partial MD5 signatures, full MD5 signatures, and then performs a byte-by-byte comparison for verification.

fdupes is written in C and is released under the MIT License.

External links

• Official fdupes homepage
• Enhanced fdupes fork with Windows and Mac OS X binaries available