MySQL Daemon failed to start_MySQL
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由于symfony2需要php5.4.11以上的版本才会运行良好的性能，所以我今天重新安装了php5.5顺便重新安装新版本的mysql但是就在我 要启动Mysql时发现“MySQL Daemon failed to start”启动失败的提示，以至于我查找了很多资料，都说是看日志，改权限，但是我发现：第一 mysql日志什么都没有写，第二改完权限也没有用。正在着急之际，我在google（嗨，百度找黄片行，找资料真心不给力，百度上的资料基本一个样，让 我感觉大家都是ctrl+v的）搜索了一下，有人冒是也有出现类似——日志也是什么都没有。他提醒了我：从/usr/share/mysql下复制了一个 mysql自带的my-small.cnf配置文件到etc下(my.cnf)，重启服务，OK了。之后我把之前的my.cnf再复制回去，还是不行，说 明是配置问题，将配置文件一句一句对过后发现是“skip-locking”的问题，网上再查看了一下发现：原来新版本中是“skip- external-locking”，而旧版本中是“skip-locking”。原来是版本问题，所以最后把配置文件中的skip-locking改为 skip-external-locking就可以启动mysql了
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