mysql 建库报匿名用户权限错误

报错信息:

ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'meitu'

系统环境：

• Centos 7.5
• Mysql Server version: 5.6.48

分析原因：匿名用户（''）权限报错

问题描述：

安装好mysql后，root用户账户登录mysql，创建一个新数据库时，提示报错，如下：

[root@localhost mysql]# mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.48 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
+--------------------+
1 row in set (0.00 sec)

mysql> create database meitu charset=utf8;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'meitu'

解决方法：

1. 在/etc/my.cnf的[mysqld]字段下加入：skip-grant-tables ， 如下截图

2. 再重启mysqld服务

[maaiqiang@localhost ~]$ systemctl restart mysqld

这时的mysql不需要密码即可登录数据库

3. 登录进入mysql，执行以下命令

mysql > use mysql;
mysql > delete from user where USER='';
mysql > flush privileges;
mysql > exit;

4. 再删除/etc/my.ini中的skip-grant-tables，重启mysqld服务即可正常建库了。