code: public static void printGenericCommandUsage(PrintStream out) {
      
      out.println("Generic options supported are");
      out.println("-conf <configuration file>     specify an application configuration file");
      out.println("-D <property=value>            use value for given property");
      out.println("-fs <local|namenode:port>      specify a namenode");
      out.println("-jt <local|jobtracker:port>    specify a job tracker");
      out.println("-files <comma separated list of files>    " + 
        "specify comma separated files to be copied to the map reduce cluster");
      out.println("-libjars <comma separated list of jars>    " +
        "specify comma separated jar files to include in the classpath.");
      out.println("-archives <comma separated list of archives>    " +
                  "specify comma separated archives to be unarchived" +
                  " on the compute machines.\n");
      out.println("The general command line syntax is");
      out.println("bin/hadoop command [genericOptions] [commandOptions]\n");
    }
docs: Print the usage message for generic command-line options supported.
  
  @param out stream to print the usage message to.