code: public static void main(String[] args) {
      InstancedConfiguration conf = new InstancedConfiguration(ConfigurationUtils.defaults());
      if (!ConfigurationUtils.masterHostConfigured(conf) && args.length > 0) {
        System.out.println(ConfigurationUtils
            .getMasterHostNotConfiguredMessage("Alluxio fsadmin shell"));
        System.exit(1);
      }
      // Reduce the RPC retry max duration to fall earlier for CLIs
      conf.set(PropertyKey.USER_RPC_RETRY_MAX_DURATION, "5s", Source.DEFAULT);
      FileSystemAdminShell fsAdminShell = new FileSystemAdminShell(conf);
      System.exit(fsAdminShell.run(args));
    }
docs: Manage Alluxio file system.
  
  @param args array of arguments given by the user's input from the terminal