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Tech riderRev. 5 Oct 2026

fdupes

Ch 156.6of 38 Duplicate File Finders
  1. 1Runs onLinux
  2. 2CostsFree plan
  3. 3Scan locationsspecified directories; subdirectories; symlinked directories
  4. 4Match methodsfile size; MD5 signature; byte-by-byte comparison
  5. 5Automatic selectionYes
5 lines stated Written from the maker's own pages: github.com
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Overview

fdupes is ranked #15 of 38 in duplicate file finders on Specifiction. It runs on Linux. There is a free plan.

fdupes plans and pricing

All plans
Free Free Free software under a license permitting use, copying, modification, and distribution github.com · 5 Oct 2026

Compared on duplicate file finders

Scan locations
specified directories; subdirectories; symlinked directoriesgithub.com
Match methods
file size; MD5 signature; byte-by-byte comparisongithub.com
Automatic selection
Yesgithub.com

Facts

Purpose
fdupes identifies duplicate files within specified directories and can delete selected duplicates.github.com · 5 Oct 2026
Recursive scans
It can recurse into subdirectories and optionally follow symbolic links.github.com · 5 Oct 2026
Duplicate matching
It offers a quick summary mode that skips slower byte-for-byte match confirmation.github.com · 5 Oct 2026
Comparison cache
An optional database cache stores file signatures to speed up comparisons.github.com · 5 Oct 2026
Filters and sorting
Options include minimum and maximum file sizes, hidden and empty file exclusions, permission matching, and sorting by time, change time, or name.github.com · 5 Oct 2026
Deletion
Interactive deletion prompts users to choose which files to preserve, while no-prompt modes can delete duplicates automatically.github.com · 5 Oct 2026
Deletion caution
The project warns that using deletion with symlink following or listing the same directory more than once can lead to data loss.github.com · 5 Oct 2026
Install method
The project recommends installing through the operating system’s package manager when available, or downloading a release and compiling it.github.com · 5 Oct 2026
Build dependencies
A full-featured build requires ncursesw and PCRE2; building without ncurses disables the screen-mode selection interface.github.com · 5 Oct 2026
Integrations
The project documents no third-party service integrations; it runs against directories supplied on the command line.github.com · 5 Oct 2026
Security
GitHub reports that the project has no SECURITY.md policy and no published security advisories.github.com · 5 Oct 2026
License
The software is provided free of charge under terms that permit use, copying, modification, distribution, sublicensing, and sale of copies.github.com · 5 Oct 2026
Support
The README lists Adrian Lopez’s email address for contact; no formal support plan is described.github.com · 5 Oct 2026
Intended user
The maintainer says the development version is intended for developers and recommends end users use a release version.github.com · 5 Oct 2026

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