protected File workingDirectory = null;

    protected int maxOutputLine = 1000;

    protected long executionTimeout = 30L * 1000L; // 30sec

    protected String commandOutputEncoding = Charset.defaultCharset().displayName();

    protected String[] updateCommand;

    protected String[] deleteCommand;

    protected String[] targetUsers;

    @Override
    public void update(final User user) {