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crack

Password guessing program (crypt() variant)

uncategorizedRed Team
Official docs ↗Download ↗Source repo ↗

Platforms: Linux · Last verified September 6, 2026

Crack is program designed to quickly locate vulnerabilities in Unix (or other) password files by scanning the contents of a password file, looking for users who have misguidedly chosen a weak login password.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

See the official Kali tool page and upstream homepage linked above for installation and usage details.

Commonly preinstalled on

Kali Linux

Debian-based distribution built for penetration testing and security auditing