Kon-Boot is not available for Linux but there are a few alternatives that runs on Linux with similar functionality. The best Linux alternative is John the Ripper, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Kon-Boot and four of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Kon-Boot are ophcrack, Offline NT Password & Registry Editor and Trinity Rescue Kit.
John the Ripper is a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix systems, supported...
Ophcrack is a Windows Password cracker based on Rainbow Tables.
Features
Cracks LM and NTLM Windows hashes Free tables available for Windows XP, Vista and 7 Brute-force module for simple passwords Audit mode and CSV export Real-time graphs to analyze the pas.
Windows stores its user information, including crypted versions of the passwords, in a file called 'sam', usually found in \windows\system32\config. This file is a part of the registry, in a binary format previously undocumented, and not easily accessible.
Trinity Rescue Kit or TRK is a free live Linux distribution that aims specifically at recovery and repair operations on Windows machines, but is equally usable for Linux recovery issues. Since version 3.
Russia
Switzerland
Norway
Belgium
EU
John the Ripper is a password cracker where Kon-Boot bypasses the login password all together.