public static String getLinuxPID(String command) {
        BufferedReader reader = null;
        try {
            //显示所有进程
            Process process = Runtime.getRuntime().exec("ps -ef");
            reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.contains(command)) {
                    String[] strs = line.split("\\s+");
                    return strs[1];
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {

                }
            }
        }
        return null;
    }