public static String command(String cmd) throws Exception {

    String out = "";
    Runtime runtime = Runtime.getRuntime();
    process proc = runtime.exec(cmd);

    proc.waitFor();



    InputStream is = proc.getInputStream();
    InputStreamReader isr = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(isr);

    String line;
    while ((line = br.readLine()) != null) {
        System.out.println(line);
        if (!out.equals(""))
            out += '\n';

        System.out.println(line);

        out += line;
    }
    if(proc.exitValue() == 1)
        throw exErrorOne;



    return out;
}