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String[] cmdArray = new String[]{"start-stop-daemon","--start","-m","--pidfile","/home/guo/ping.pid","--exec","/bin/ping","--","192.168.0.1"};
ProcessBuilder pb = new ProcessBuilder(Arrays.asList(cmdArray));
pb.redirectErrorStream(true);
Process p = pb.start();
//Field f = p.getClass().getDeclaredField("pid");
//f.setAccessible(true);
//int pid = (int) f.get(p);
//System.out.println(pid);
//Thread.sleep(11000);
//p.destroy();
IOUtils.readIn(p.getInputStream());