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MySQL "Can't connect to local mysql server

Jun 07, 2016 pm 03:41 PM
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今天安装了MySQL 5.5的社区里程碑版,按照顺序,我先卸载了以前的5.0版,然后依照顺序分别安装了服务器、客户端(rpm版)。 谁知在执行mysql命令的时候,总是提示:"Can't connect to local mysql server through socket '/var/lib/mysql/mysql.sock'。 我分

    今天安装了MySQL 5.5的社区里程碑版,按照顺序,我先卸载了以前的5.0版,然后依照顺序分别安装了服务器、客户端(rpm版)。

    谁知在执行mysql命令的时候,总是提示:"Can't connect to local mysql server through socket '/var/lib/mysql/mysql.sock'。

    我分别在google上找了这种方法,不行;尝试了这种方法,也不行;后来还尝试了N种不同的方法,甚至我还在/etc/目录下手动写了个my.cnf文件(最终发现手动写的这个配置文件不会带来帮助反而会误导mysql服务启动,最终还是把它删除才解决了问题)......

    柳暗花明又一村,在这里通过比较暴力的方法最终解决了我的问题,记录如下:

    1、使用ps -aux|grep mysql查找与mysql相关的进程pid。

    2、使用kill命令结束语mysql相关的进程。

    3、启动service mysql -start。

    最后输入mysql命令,终于出现了久违的"Welcome to the MySQL monitor.  Commands end with ; or /g.
Your MySQL connection id is 1
Server version: 5.5.0-m2-community MySQL Community Server (GPL)"

   

    查找问题过程中几个关键点:

    1、首先查找错误提示中提到的mysql.sock文件(find / -name mysql.sock),发现找不到(该文件比较特殊)。

    2、找不到文件,要想到重新启动mysql服务(service mysql restart)。

    3、但是重启服务需要依赖mysql.sock,这就成了死循环,该如何办呢?

    4、使用暴力kill掉与mysql相关的进程。

   

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