hashdeep
A cross-platform toolset for computing and auditing file hashes with multiple algorithms including MD5, SHA-1, SHA-256, Tiger, and Whirlpool.
What is hashdeep?
Hashdeep is a command-line utility for computing cryptographic hash values of files and directories using multiple algorithms like MD5, SHA-1, and SHA-256. It solves the need for file integrity verification, duplicate file detection, and forensic analysis by generating and comparing hash digests. The tool can recursively process directory structures and audit files against known hash sets.
System administrators, forensic analysts, and developers who need to verify file integrity, detect duplicates, or maintain checksums for large sets of files across different operating systems.
Developers choose Hashdeep for its multi-algorithm support, cross-platform compatibility, and built-in audit functionality, which together provide a reliable, scriptable solution for file integrity monitoring without requiring external dependencies.
Overview
Hashdeep (formerly md5deep) is a suite of command-line tools for computing cryptographic hashes of files and directories, with support for recursive directory traversal. It enables file integrity verification, duplicate detection, and forensic analysis by comparing computed hashes against known values.
Key Features
- Multi-Algorithm Support — Computes hashes using MD5, SHA-1, SHA-256, Tiger, and Whirlpool algorithms.
- Recursive Directory Traversal — Processes entire directory structures with a single command.
- Audit Mode — Compares file hashes against a known set to verify integrity, identifying missing, new, or modified files.
- Cross-Platform Compatibility — Works on Windows and POSIX systems with Unicode filename handling.
- Flexible Output — Generates hash lists that can be saved and reused for subsequent audits.
Philosophy
Hashdeep prioritizes reliability and forensic accuracy, providing a straightforward, scriptable toolset for file integrity monitoring and verification tasks.
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