hydra著名黑客组织thc的一款开源的密码暴力破解工具，可以破解多种密码

Syntax: hydra [[[-l LOGIN|-L FILE] [-p PASS|-P FILE]] | [-C FILE]] [-e nsr] [-o
FILE] [-t TASKS] [-M FILE [-T TASKS]] [-w TIME] [-W TIME] [-f] [-s PORT] [-x MIN
:MAX:CHARSET] [-SuvV46] [server service [OPT]]|[service://server[:PORT][/OPT]]

Options:
  -R        restore a previous aborted/crashed session
  -S        perform an SSL connect
  -s PORT   if the service is on a different default port, define it here
  -l LOGIN or -L FILE  login with LOGIN name, or load several logins from FILE
  -p PASS  or -P FILE  try password PASS, or load several passwords from FILE
  -x MIN:MAX:CHARSET  password bruteforce generation, type "-x -h" to get help
  -e nsr    try "n" null password, "s" login as pass and/or "r" reversed login
  -u        loop around users, not passwords (effective! implied with -x)
  -C FILE   colon separated "login:pass" format, instead of -L/-P options
  -M FILE   list of servers to be attacked in parallel, one entry per line
  -o FILE   write found login/password pairs to FILE instead of stdout
  -f / -F   exit when a login/pass pair is found (-M: -f per host, -F global)
  -t TASKS  run TASKS number of connects in parallel (per host, default: 16)
  -w / -W TIME  waittime for responses (32s) / between connects per thread
  -4 / -6   prefer IPv4 (default) or IPv6 addresses
  -v / -V   verbose mode / show login+pass combination for each attempt
  -U        service module usage details
  server    the target server (use either this OR the -M option)
  service   the service to crack. Supported protocols: cisco cisco-enable cvs ft
p ftps http[s]-{head|get} http[s]-{get|post}-form http-proxy http-proxy-urlenum
icq imap[s] irc ldap2[s] ldap3[-{cram|digest}md5][s] mssql mysql nntp oracle-lis
tener oracle-sid pcanywhere pcnfs pop3[s] rdp rexec rlogin rsh sip smb smtp[s] s
mtp-enum snmp socks5 svn teamspeak telnet[s] vmauthd vnc xmpp
  OPT       some service modules need special input (use -U to see module help)
Use HYDRA_PROXY_HTTP/HYDRA_PROXY and HYDRA_PROXY_AUTH environment for a proxy.

Hydra is a tool to guess/crack valid login/password pairs - usage only allowed
for legal purposes.  Newest version available at xdowns.com The following services were not compiled in: postgres sapr3 firebird afp ncp ssh
 oracle.

Examples:
  hydra -l john -p doe 192.168.0.1 ftp
  hydra -L user.txt -p defaultpw -S 192.168.0.1 imap PLAIN
  hydra -l admin -P pass.txt http-proxy://192.168.0.1
  hydra -C defaults.txt -6 pop3s://[fe80::2c:31ff:fe12:ac11]:143/DIGEST-MD5