報了：Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)的錯。

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解決方案：

1.查看是不是mysql許可權的問題 （預設安裝方式為 yum -y install mysql）

轉到  /etc/rc.d/init.d/目錄下

[[email protected] init.d]# mysqld status
2018-06-11 15:20:47 0 [Warning] TIMESTAMP with implicit DEFAULT value is depreca ted. Please use --explicit_defaults_for_timestamp server option (see documentati on for more details).
2018-06-11 15:20:47 0 [Note] mysqld (mysqld 5.6.40) starting as process 12917 .. .
2018-06-11 15:20:47 12917 [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

2018-06-11 15:20:47 12917 [ERROR] Aborting

2018-06-11 15:20:47 12917 [Note] Binlog end
2018-06-11 15:20:47 12917 [Note] mysqld: Shutdown complete

其中的第一個錯誤是

2018-06-11 15:20:47 12917 [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

這是因為MySQL為了安全，不希望root使用者直接啟動mysql。

所以可以在 /etc/my.cnf裡增加 user=mysql  來指定mysql的使用者

--------------------------------------------------------------------

[mysqld]

user=mysql

--------------------------------------------------------------------

[[email protected] search]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.40 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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.

mysql>

 可以看到mysql啟動成功。

報了：Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)的錯。