今天登陆mysql 提示Can't connect to local MySQL server rhrough socket 的问题，结合两篇帖子解决
我的系统是centos
首先：
cp /usr/share/doc/MySQL-server-5.5.24/my-medium.cnf /etc/my.cnf
其次：
touch /var/lib/mysql/mysql.scok
查看下数据库运行状态
/etc/init.d/mysql status
提示
ERROR! MySQL is running but PID file could not be found
先打印MYSQL进程
ps aux | grep mysql
然后KILL进程
kill -9 pid1 pid2 …
再启动MYSQL
/etc/init.d/mysql start
再检查mysql运行状态
/etc/init.d/mysql status
因为一开始/etc下我是找不到my.cnf 这个文件的，/usr/share/doc/MySQL-server-5.5.24/这个下面有个my-default.cnf这个文件，看了看，感觉和my-medium.cnf差不多，就拷贝到etc目录下了，来充当my.cnf吧，
mysql有两种启动方式，一种tcp，一种socket，一般来说tcp启动没问题，只是socket启动才会出现上述问题。
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