John the Ripper is the application that underlies Johnny. You may be like us, and be more comfortable on the command line than in a GUI, when using password cracking tools, such as John the Ripper. You may go for the CLI because it uses fewer resources than the GUI, or because you are working through an SSH connection to a server without a GUI interface. It is easy to use John the Ripper, and there are a lot more options and ways to use John by using the command line that have not yet been added to Johnny.
You can see all the various hashing algorithms supported by John and test the speed of your system for cracking by running the following command:
john -test
This will run through all the various hashing algorithms supported by John and give you the speed it will take for the various hashes. The following screenshot shows the read-out from the test...
