MySQL丢了root密码怎么办?
作者：王猛 (HeartIcy@163.com)
丢了密码是非常痛心的事情，尤其是root密码丢了:( 。自己装装
玩的丢了也就丢了，但是万一是生产服务器挂了麻烦可就大了！
现在假设是由于被入侵造成的root密码丢失。这里我谈一下我自己
对这样一个问题的看法。
首先遇到这种问题我们没有必要慌张，整个恢复过程也是很简单的。
1 下载MySQL源码分发包，不用区分操作系统，我们需要的东西是一
样的。
2 重命名自己的mysql的data目录下的mysql文件夹为oldmysql。
3 将源码包中data目录下的mysql目录复制到你的mysql的data目录
下。
4 重新启动mysql，现在mysql的授权关系同全新安装的一样，空密
码登陆，然后自行调整授权。
5 打开oldmysql这个库检查到底出现了什么问题。
6 如果有备份对系统中原有的数据库进行完整性检测，以免被人修
改。
通过上述6个步骤已经可以完全恢复你对mysql的控制，重点就是最
后两步检查对方对改了那些权限，以及数据的完整性检测。
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