runtime exec

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Test {
	public static void main(String[] args) {
		String command = "ifconfig";
		try {
			Process a = Runtime.getRuntime().exec(command);
			InputStreamReader read = new InputStreamReader(a.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(read);
            String lineTxt = null;
            while((lineTxt = bufferedReader.readLine()) != null){
                System.out.println(lineTxt);
            }
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}