處理方案：

1、先用localhost方式連接到MySQL數據庫，然後使用MySQL自帶的數據庫mysql;

use mysql；

2、執行：select host from user where user = ‘root‘; 發現，host的值就是localhost。

所以將它的值改掉：update user set host=‘%‘ where user = ‘root‘;

3、修改完成後，執行：flush privileges;

將修改內容生效，再次配置時，用IP地址或者localhost 就都能正常連接到MySQL數據庫了。

操作如下：

mysql> use mysql

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> select host from user where user = ‘root‘;

+-----------+

| host |

+-----------+

| localhost |

+-----------+

1 row in set (0.00 sec)

mysql> update user set host=‘%‘ where user = ‘root‘;

Query OK, 1 row affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> select host from user where user = ‘root‘;

+------+

| host |

+------+

| % |

+------+

1 row in set (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql>

連接mysql時報：message from server: "Host '192.168.76.89' is not allowed to connect to this MySQL server