Fdupes

fdupes
Original author	Adrián López
Initial release	25 December 1999; 26 years ago (1999-12-25)
Stable release	2.4.0[1] / 30 March 2025; 9 months ago (30 March 2025)
Repository	github.com/adrianlopezroche/fdupes
Written in	C
Operating system	Linux, macOS
Available in	English

fdupes is a program written by Adrián López to scan directories for duplicate files,^[2] 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.

References

1. "Release fdupes 2.4.0". 30 March 2025. Retrieved 1 January 2026.
2. "System-Utilities für alle Fälle | c't Magazin".

External links

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