Help needed in executing a remote batch file

Question

I need to execute a batch file which is located on a remote machine through my machine. I have no idea to go about with. Please can someone help me out with can be used to execute the remote bat file. I am at present using Runtime.exec() to execute it on my machine.. But i cant use it to execute teh bat file on teh remote machine.Please help

Answer 1

Below is an example server that would run on the remote host. You can connect to it using telnet from DOS prompt, it takes a Y/N to run your command in the cmd variable. I haven't included code for a client as it's really not needed for the example below.
Change the cmd and port variables to what you need. You may need to setup firewall rules to allow your chosen port.
Once it's running, you can test it by using "telnet localhost 1234" on your machine, localhost would obviously become the remote computer's hostname or IP.
I am incredibly new to Java (using the forums to learn bits), so excuse any bad coding practises, I'm sure people will point them out.
Keep in mind that this is totally insecure, so if you're using it on an untrusted network, you may want to look into encryption and providing some kind of password authentication, that, for the moment is out of my league.
Screenshot here.
import java.io.*;
import java.net.*;
class RemoteServer {
     public static int    port = 1234;           // Port to listen on
     public static String cmd  = "C:\\Test.bat"; // Command to run
     public static void main(String[] args)
          System.out.println("Waiting for connection...");
          try {
               /* If you want the server to run forever, uncomment the while
                  loop */
               // while (true)
                    startServer();
          } catch (IOException e) {
               e.printStackTrace();
               System.exit(1);
     /* Starts the server */
     private static void startServer() throws IOException
          ServerSocket server = null;
          Socket       client = null;
          String input;
          try {
               server = new ServerSocket(port);
          } catch (IOException e) {
               System.err.println("Unable to list on port " + port);
               System.exit(1); // Can't listen, nothing else to do
          try {
               client = server.accept();
               System.out.println("Client connected... awaiting Y/N");
          } catch (IOException e) {
               System.err.println("Unable to accept connection.");
               System.exit(1);
          PrintWriter out = new PrintWriter(client.getOutputStream(), true);
          BufferedReader in = new BufferedReader(new InputStreamReader(
                                                 client.getInputStream()));
          out.println("You are connected, ready to launch command: <y/n>");
          while ((input = in.readLine()) != null)
               if (input.equalsIgnoreCase("y"))
                    Runtime rt = Runtime.getRuntime();
                    rt.exec(cmd);
                    out.println("Command executed... disconnecting.");
                    System.out.println("Command executed... disconnecting client.");
                    break;
               } else if (input.equalsIgnoreCase("n")) {
                    break;
               } else {
                    out.println("Please enter Y/N.");
          out.close();
          in.close();
          client.close();
          server.close();
}