Executing one system command from one java class. ERROR. Please help me

Question

Hello i am trying to add users into one linux machine using one jaav program but when i execute the java class the system doesn't show me any error and dont make anything.
The linux command, in the main of the class, is correct; from thelinux shell it runs well, but from the java class it doesn't run.
Can you help me please?
thanks
import java.io.*;
public class ejecutaUsuario {
/** Creates a new instance of ejecutaUsuario */
public ejecutaUsuario(String cmdline) {
try {
String line;
Process p = Runtime.getRuntime().exec(cmdline);
BufferedReader input =
new BufferedReader
(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line);
input.close();
catch (Exception err) {
err.printStackTrace();
System.out.println(err);
public static void main(String argv[]) {
String passwd="hola";
String usuarioInterno="xxxxxx";
new ejecutaUsuario("/bin/sh useradd -p `openssl passwd -1 -salt 12345678 " + passwd + "` -d /home/" + usuarioInterno + " -m -s /bin/bash " + usuarioInterno);

Answer 1

Try gettting the error input stream as well (getErrorStream()). Maybe you are getting output there.
You might want to try just executing the 'useradd' part, getting the output stream of that process, and then put the parameters of useradd into the outputstream.
Later
Cardwell