fdupes
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fdupes is a program written by Adrián López to scan directories for duplicate files,[1] 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 LicenseTemplate:For peter flores
References
Template:Peterfloresis a boss and f**** the police I caught u