mysql>update user set host = ‘%‘ where user = ‘root‘;
mysql>select host, user from user;
2.
mysql>GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘mypassword‘ WITH GRANT OPTION;
mysql>flush privileges;
说明：%是哪个IP地址可以访问这个MYsql服务，可以换成你想要的IP地址！
Host is not allowed to connect to this MySQL server 错误的处理方法
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