部署mysql版本信息

version: 5.6.21

具体现象：

mysql服务能够正常启动如下：

[root@localhost ~]# service mysqld restart

Shutting down MySQL.. SUCCESS!

Starting MySQL.. SUCCESS!

登陆mysql库出现如下错误：

[root@localhost ~]# mysql

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

解决方法：

经过对如上错误分析，/var/lib/mysql/目录下缺少mysql.sock（mysql的套字节）

[root@localhost ~]# find / -name mysql.sock

/tmp/mysql.sock

只要系统中存在mysql.sock这个文件，接下来解决问题就会很好办如下操作：

[root@localhost ~]# ln -s /tmp/mysql.sock /var/lib/mysql/mysql.sock

重启服务

[root@localhost ~]# service mysqld restart

Shutting down MySQL.. SUCCESS!

Starting MySQL.. SUCCESS!

重新登陆

[root@localhost ~]# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.6.21 MySQL Community Server (GPL)

Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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