Navicat 连接mysql失败： Host '*' is not allowed to connect to this MariaDB server，navicatmariadb

Navicat 连接mysql失败： Host '*' is not allowed to connect to this MariaDB server，navicatmariadb

题描述：Navicat 为管理方便，连接Linux 中MySQL失败，如下如下错误：Host '*' is not allowed to connect to this MariaDB server

解决方案：

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1. //允许用户testuser从ip为222.129.1.1的主机连接到mysql服务器，并使用testpassword作为密码  
2. MariaDB [(none)]> grant all privileges on *.* to 'testuser'@'222.129.1.1' identified by 'testpassword' with grant option;    
3. (若是允许所有ip：GRANT ALL PRIVILEGES ON *.* TO ‘testuser’@'%’ IDENTIFIED BY ‘testpassword’ WITH GRANT OPTION;)  
4. MariaDB [(none)]> flush privileges;   //刷新权限缓存  
5. MariaDB [(none)]> show privileges;  
6. MariaDB [(none)]> show grants for  'testuser'@'222.129.1.1'