What tool can be used to bootphrase a passphrase in an ssh private key?

Question

linux

Where can I drive in what other letters, symbols and numbers to use for brute force. (I remember the password approximately, but not exactly what, in theory, should reduce the brute force time)

Answer 1

1. Crowbar
   
2. Ncrack
   
3. THC-Hydra
   
4. medusa