ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'

故障描述：

启动mysql 报错：
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

1.先查看mysql启动状态

#/etc/rc.d/init.d/mysqld status

2.mysql.sock位置查找与验证？

# find / -name mysql.sock
/Data/mydata/mysql.sock
验证目录是否正确
#mysql -u root -p -S /Data/mydata/mysql.sock

备注：-S参数socket file文件验证

3.验证mysql.sock文件权限和用户是否正确？如果是权限问题，则先改变权限 
#chown -R mysql:mysql /Data/mydata/mysql.sock


[root@localhost ~]# /etc/init.d/mysqld start
启动 MySQL： [ OK]

4.永久解决

修改/etc/my.cnf

添加以下内容到/etc/my.conf:
[client]
socket = /Data/mydata/mysql.sock
[mysqld]

socket = /Data/mydata/mysql.sock

5、终极大招~~~~~~

实际检查发现，yum安装的没有mysql.sock，没有my.conf

...那一定是漏了什么，果然，mysql-server没装

yum install mysql-server

/etc/init.d/mysqld start

[ OK ]
Starting mysqld: [ OK ]