First of all, most likely you do not need to install John the Ripper system-wide. The following instructions apply to the source usb safely remove 3.3 1.617 keygen code distribution of John only. Johnny on Debian Johnny on Ubuntu Johnny on Oohnny on Windows. Generic tarball (manual installation or no installation. x86 (i386). John the Ripper is a fast password cracker, currently available for many flavors. How to install. See INSTALL for information on installing John on your system. John the Ripper - is a fast password cracker. Its primary purpose is to detect weak Unix passwords. Most likely you do not need to install John the Ripper. Debian differs from other distributions that offer John in their repositories because it offers a nice manual page, although upstream doesn t have one. To install. A generic tutorial rehashing much of the official documentation. How-to: John the Ripper on a Ubuntu 10.04 MPI Cluster (by Ptur Ingi also).