code: private void wrongUsage() {
  
          String usage = "Usage: java -cp $PATH_TO_OPENCMS_JAR org.opencms.rmi.CmsRemoteShellClient\n"
              + "    -script=[path to script] (optional) \n"
              + "    -registryPort=[port of RMI registry] (optional, default is "
              + CmsRemoteShellConstants.DEFAULT_PORT
              + ")\n"
              + "    -additional=[additional commands class name] (optional)";
          System.out.println(usage);
          System.exit(1);
      }
docs: Displays text which shows the valid command line parameters, and then exits.