dollarkiller@dollarkiller-virtual-machine:~/Github/ddbfc$ ./ddbfc -h
NAME:
   DdbFC - Distributed DNS brute force cracking CLi

USAGE:
   ddbfc [global options] command [command options] [arguments...]

VERSION:
   0.1

AUTHOR:
   DollarKiller <[email protected]>

COMMANDS:
   scan     start to crack weak password
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --domain value, -d value   domain
   --timeout value, -t value  Single DNS query timeout Millisecond (default: 400)
   --tryNum value, -r value   Number of attempts (default: 3)
   --max value, -m value      Maximum number of concurrency (default: 200)
   --help, -h                 show help
   --version, -v              print the version