标签 - 参考资料：[linux程序的常用保护机制](https://introspelliam.github.io/2017/09/30/linux%E7%A8%8B%E5%BA%8F%E7%9A%84%E5%B8%B8%E7%94%A8%E4%BF%9D%E6%8A%A4%E6%9C%BA%E5%88%B6/)