-bash-2.05b# apt-get install john && john --help
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  wordlist
The following NEW packages will be installed:
  john
0 upgraded, 1 newly installed, 0 to remove and 19 not upgraded.
Need to get 0B/1198kB of archives.
After this operation, 2363kB of additional disk space will be used.
Selecting previously deselected package john.
(Reading database ... 47501 files and directories currently installed.)
Unpacking john (from .../john_1.7.9-jumbo-7-1maemo0_armel.deb) ...
Setting up john (1.7.9-jumbo-7-1maemo0) ...
John the Ripper password cracker, ver: 1.7.9-jumbo-7 [generic]
Copyright (c) 1996-2012 by Solar Designer and others
Homepage: http://www.openwall.com/john/

Usage: john [OPTIONS] [PASSWORD-FILES]
--config=FILE             use FILE instead of john.conf or john.ini
--single[=SECTION]        "single crack" mode
--wordlist[=FILE] --stdin wordlist mode, read words from FILE or stdin
                  --pipe  like --stdin, but bulk reads, and allows rules
--loopback[=FILE]         like --wordlist, but fetch words from a .pot file
--dupe-suppression        suppress all dupes in wordlist (and force preload)
--encoding=NAME           input data is non-ascii (eg. UTF-8, ISO-8859-1).
                          For a full list of NAME use --list=encodings
--rules[=SECTION]         enable word mangling rules for wordlist modes
--incremental[=MODE]      "incremental" mode [using section MODE]
--markov[=OPTIONS]        "Markov" mode (see doc/MARKOV)
--external=MODE           external mode or word filter
--stdout[=LENGTH]         just output candidate passwords [cut at LENGTH]
--restore[=NAME]          restore an interrupted session [called NAME]
--session=NAME            give a new session the NAME
--status[=NAME]           print status of a session [called NAME]
--make-charset=FILE       make a charset file. It will be overwritten
--show[=LEFT]             show cracked passwords [if =LEFT, then uncracked]
--test[=TIME]             run tests and benchmarks for TIME seconds each
--users=[-]LOGIN|UID[,..] [do not] load this (these) user(s) only
--groups=[-]GID[,..]      load users [not] of this (these) group(s) only
--shells=[-]SHELL[,..]    load users with[out] this (these) shell(s) only
--salts=[-]COUNT[:MAX]    load salts with[out] COUNT [to MAX] hashes
--pot=NAME                pot file to use
--format=NAME             force hash type NAME: afs bf bfegg bsdi crc32 des dmd5 dominosec dragonfly3-32 dragonfly3-64 dragonfly4-32 dragonfly4-64 drupal7 dummy dynamic_n epi episerver gost hdaa hmac-md5 hmac-sha1 hmac-sha224 hmac-sha256 hmac-sha384 hmac-sha512 hmailserver ipb2 keepass keychain krb4 krb5 lm lotus5 md4-gen md5 md5ns mediawiki mscash mscash2 mschapv2 mskrb5 mssql mssql05 mysql mysql-sha1 nethalflm netlm netlmv2 netntlm netntlmv2 nsldap nt nt2 odf office oracle oracle11 osc pdf phpass phps pix-md5 pkzip po pwsafe racf rar raw-md4 raw-md5 raw-md5u raw-sha raw-sha1 raw-sha1-linkedin raw-sha224 raw-sha256 raw-sha384 raw-sha512 salted-sha1 sapb sapg sha1-gen sha256crypt sha512crypt sip ssh sybasease trip vnc wbb3 wpapsk xsha xsha512 zip
--list=WHAT               list capabilities, see --list=help or doc/OPTIONS
--save-memory=LEVEL       enable memory saving, at LEVEL 1..3
--mem-file-size=SIZE      size threshold for wordlist preload (default 5 MB)
--nolog                   disables creation and writing to john.log file
--crack-status            emit a status line whenever a password is cracked
--max-run-time=N          gracefully exit after this many seconds
--regen-lost-salts=N      regenerate lost salts (see doc/OPTIONS)
-bash-2.05b#