The operation is very simple, on the 5 step, as follows:
1.login mysql ：
>mysql -uroot -p;
2.Using mysql database：
>use mysql;
3.View user table ：
>SELECT Host,User FROM user;
+--------------+------+-------------------------------------------+
| host | user | password |
+--------------+------+-------------------------------------------+
| localhost | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
| 192.168.1.1 | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
+--------------+------+-------------------------------------------+
4.Update user table ：
>UPDATE user SET Host = '%' WHERE User = 'root ...