mysql> use mysql; (此DB存放MySQL的各種配置信息)
Database changed
mysql> select host,user from user; (查看用戶的權限情況)
mysql> select host, user, password from user;
+-----------+------+-------------------------------------------+
| host | user | password |
+-----------+------+-------------------------------------------+
| localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
| 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
| localhost | | |
+-----------+------+-------------------------------------------+
4 rows in set (0.01 sec)
由此可以看出，只能以localhost的主機方式訪問。
解決方法：
mysql> Grant all privileges on *.* to 'root'@'%' identified by '密碼' with grant option;
(%表示是所有的外部機器，如果指定某一臺機，就將%改爲相應的機器名；‘root’則是指要使用的用戶名，密碼替換爲所需要的密碼)
mysql> flush privileges; (運行此句才生效，或者重啓MySQL)
Query OK, 0 rows affected (0.03 sec)
