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/**
 * 创建数据表 
 * create database ami8 default charset utf8 collate utf8_general_ci;
 * 创建用户
 * create user ami8@localhost identified by 'amibaplus2016';
 * 授权
 * grant  all on ami8.* to ami8@localhost with grant option;
 * 刷新权限
 * flush privileges;
 * 
 * drop user admin@localhost;
 * flush privileges;
 * create user admin@localhost identified by 'admins_password'
 */

Step one: Allowing access
Out of the box, MySQL will only allow access from the localhost address 127.0.0.1. To change this, you need to open the /etc/mysql/mysql.conf.d/mysqld.cnf file and change the line:

bind-address = 127.0.0.1
to:

bind-address = 0.0.0.0
Save and close that file. Restart the MySQL server with the command:

systemctl restart mysql.service
Step two: Granting access to the user
Let's say you have your WordPress server set up (running on IP address 192.168.1.100) to access a MySQL database named wordpressdb on the MySQL server with user wpadmin. On the MySQL server, you must grant access to the wordpressdb to that user from that IP address. Here's how to grant the user access (I'm assuming you already created the user wpadmin on the MySQL server and given it password %u#098Tl3).

Log in to the MySQL server.
Log in to MySQL with the command mysql -u root -p
Type the MySQL root user password.
Issue the MySQL command:
GRANT ALL ON wordpressdb.* TO 'wpadmin'@'192.168.1.100' IDENTIFIED BY '%u#098Tl3' WITH GRANT OPTION;
Flush the MySQL privileges with the command FLUSH PRIVILEGES;
Exit out of the MySQL prompt with the command exit;
Your WordPress instance (set up with the proper user credentials for the database) should be able to use the remote MySQL server as its database host.

Congratulations! You successfully set up MySQL for remote connections.