Set mysql to be accessible from the Internet

1: Log in to the mysql database :

Log in to mysql with mysql -uroot -p, and then use the following methods to enable remote access:

　mysql>use mysql;
   mysql>update user set host = '%' where user = 'root';

   mysql> flush privileges; //Refresh MySQL's system privilege related table

(An error will be reported when executing update user set host = '%' where user = 'root';

ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'，

But check the host=127.0.0.1 in the user table, the data of user=root has been changed to host=%, so don’t pay attention to this error

）

2: Set the mysql configuration file
     /etc/mysql/my.cnf
     to find bind-address =127.0.0.1 and modify it to:

　　bind-address =0.0.0.0
 
　　restart mysql: /etc/init.d/mysql restart;