root@bt:/pentest/passwords/john# john --single ~/passwords.txt
Warning: detected hash type "sha512crypt", but the string is also recognized as "crypt"
Use the "--format=crypt" option to force loading these as that type instead
Loaded 1 password hash (sha512crypt [32/32])
toor             (root)
guesses: 1  time: 0:00:00:00 DONE (Fri Jan  4 10:12:42 2013)  c/s: 35.00  trying: toor
Use the "--show" option to display all of the cracked passwords reliably
root@bt:/pentest/passwords/john# john --show ~/passwords.txt
root:toor:0:0:root:/root:/bin/bash

1 password hash cracked, 0 left