Shard (1.5) can run in 3 modes:

1) Single user single password          - Use -u and -p
2) Single user multiple passwords       - Use -u and -f
3) Multiple users and multple passwords - Use -f only

For more detailed usage examples see the wiki.
    
Usage: java -jar shard-1.5.jar [options]

  -u, --username <value>  Username to test
  -p, --password <value>  Password to test
  -f, --file <value>      A path to a file containing a set of credentials or passwords
  --format <value>        The format of the credentials. Must be a regular expression with 2 capture groups. The first capture group for the username and the second capture group for the password. Defaults to a regex that will match:
        "username":"password"
  -l, --list              List available modules
  -v, --version           Print the version
  --modules <value>       Only run specific modules. A comma separated list
  --help                  Prints this usage text

$ java -jar shard.jar -l
Available modules:
        Facebook
        LinkedIn
        Reddit
        Twitter
        Instagram
        GitHub
        BitBucket
        Kijiji
        DigitalOcean
        Vimeo
        Laposte
        DailyMotion

$ java -jar shard.jar -u username-here -p password-here
21:16:25.950 [+] Running in single credential mode
21:16:30.302 [+] username-here:password-here - Reddit, Instagram

$ java -jar shard.jar -f /tmp/creds.txt
21:16:39.501 [+] Running in multi-credential mode
21:16:39.516 [+] Parsed 2 credentials
21:16:42.794 [+] username1:password1 - Reddit, Instagram
21:16:45.189 [+] username2:password2 - Facebook, LinkedIn, Twitter

  def tryLogin(creds: Credentials): Boolean