1、root用户登录到mysql数据库

代码示例:

/usr/local/mysql/bin/mysql -u root -p (输入密码进入mysql)

2、进入mysql，输入：

代码示例:

use mysql;

3、查看user表的情况

代码示例:

SELECT Host,User FROM user;

//指明主机名称，“%”表示匹配所有字符串

4、

代码示例:

UPDATE user SET Host = '%' WHERE User= 'root' LIMIT 1;

5、输入如下命令让刚才设置的命令生效

代码示例:

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

注意，在mysql 命令行形式下一定要输入";"

按照前面五个步骤完成之后，通过控制台输入：

代码示例:

[root@linux ~]# mysql -h localhost -u root -p

Enter password:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

不让这么连接数据库

原因：是因为host对应的user字段是空的，我们需要将其改为root即可

代码示例:

mysql> select host,user from user;

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

| host | user |

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

| % | root |

| 127.0.0.1 | root |

| linux | |

| linux | root |

| localhost | |

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

5 rows in set (0.00 sec)

解决办法一：

代码示例:

mysql> update user set user='root' where host='localhost';

Query OK, 1 row affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

解决办法二：

将localhost改为本机的IP地址，则能够识别了。

代码示例:

[root@linux ~]# mysql -h 172.16.42.68 -u root -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 157

Server version: 5.1.66 Source distribution

Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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