授权某一客户端以root访问mysql服务器

If you want to allow a specific client ip-address (for example: 192.168.1.4) to access the mysql database running on a server, you should execute the following command on the server that is running the mysql database.

$ mysql -u root -p
Enter password:

mysql> use mysql

mysql> GRANT ALL ON *.* to root@'192.168.1.4' IDENTIFIED BY 'your-root-password'; 

mysql> FLUSH PRIVILEGES;