-makechars:FILE make a charset, overwriting FILE
Generates a charset file, based on character frequencies
from ~/john.pot, for use with the incremental mode. The
entire ~/john.pot will be used for the charset file unless
you specify some password files. You can also use an
external filter() routine with this option.
-show show cracked passwords Shows the cracked
passwords in a convenient form. You should also
specify the password files. You can use this option
while another John is cracking, to see what it did so far.
-test perform a benchmark Benchmarks all the enabled
ciphertext format crackers, and tests them for correct
operation at the same time.
-users:[-]LOGIN|UID[,..] load this (these) user(s) only
Allows you to filter a few accounts for cracking, etc. A
dash before the list can be used to invert the check
(that is, load all the users that are not listed).
-groups:[-]GID[,..] load this (these) group(s) only Tells John
to load users of the specified group(s) only.
-shells:[-]SHELL[,..] load this (these) shell(s) only This
option is useful to load accounts with a valid shell only,
or not to load accounts with a bad shell. You can omit
the path before a shell name, so ???-shells:csh??? will match
both ???/bin/csh??? and ???/usr/bin/csh???, while
???-shells:/bin/csh??? will only match ???/bin/csh.???
716 Practical Hacking Techniques and Countermeasures
Chapter Tool Syntax
Chapter 7
(continued)
John the
Ripper
-salts:[-]COUNT set a passwords per salt limit This feature
sometimes allows you to achieve better performance.
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