Another MySQL daemon already running with the same unix socket.

问题描述：

查看MySQL进程的状态：

[root@dcx lib]# service mysqld status
mysqld is stopped

发现是关闭的，但是启动MySQL却报错

[root@dcx lib]# service mysqld start
Another MySQL daemon already running with the same unix socket.

解决方法：将mysql.sock备份一下，然后重新启动

mv /var/lib/mysql/mysql.sock /var/lib/mysql/mysql.sock.bak

问题解决