Linux mysql 允许远程连接

1、root用户登录到mysql数据库 

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

2、进入mysql，输入如下命令 

use mysql;  

3、查看user表的情况

 SELECT Host,User FROM user;  

//指明主机名称，“%”表示匹配所有字符串

4、 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 

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

[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

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：

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

[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

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