Hash Renamer

A small Bash script to rename files in a directory based on their checksum values(e.g. to remove duplicated files). You can choose any common hash algorithm (MD5, SHA1, SHA256, …), inject the hash into a filename template, and optionally handle collisions or overwrite.

Features

• Compute file hashes: md5sum, sha1sum, sha224sum, sha256sum, sha384sum, sha512sum
• Rename a single file or batch-rename an entire directory
• Customizable filename pattern (e.g. %h → hash, plus sequence numbers on collision)
• Support for recursive directory traversal or single-level processing
• Optional overwrite of existing files
• Hook in extra find options (e.g. -mtime, -size)

Usage

./hash-rename.sh [pattern] [--format FORMAT] [--hash ALGO] [--recursive true|false] [--overwrite true|false] [--find-opts OPTIONS]