mysql 实现远程链接(转)

原文地址:http://www.cnblogs.com/smallstone/archive/2010/04/29/1723838.html

1、进入mysql,创建一个新用户root,密码为root

   格式:grant 权限 on 数据库名.表名 to 用户@登录主机 identified by "用户密码";
           grant select,update,insert,delete on *.* to root@192.168.1.12 identified by "root";

   原先数据表结构

mysql> use mysql;
Database changed
mysql> select host,user,password from user;
+-----------+------+-------------------------------------------+
| host      | user | password                                  |
+-----------+------+-------------------------------------------+
| localhost | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+-----------+------+-------------------------------------------+

   执行上述语句后结果

mysql> use mysql;
Database changed
mysql> select host,user,password from user;
+--------------+------+-------------------------------------------+
| host         | user | password                                  |
+--------------+------+-------------------------------------------+
| localhost    | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| 192.168.1.12 | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+--------------+------+-------------------------------------------+
2 rows in set (0.00 sec)

 

   可以看到在user表中已有刚才创建的root用户。host字段表示登录的主机,其值可以用IP,也可用主机名,

   (1)有时想用本地IP登录,那么可以将以上的Host值改为自己的Ip即可。

2、实现远程连接(授权法)

   将host字段的值改为%就表示在任何客户端机器上能以root用户登录到mysql服务器,建议在开发时设为%。  
   update user set host = ’%’ where user = ’root’;

   将权限改为ALL PRIVILEGES

mysql> use mysql;
Database changed
mysql> grant all privileges  on *.* to root@'%' identified by "root";
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user,password from user;
+--------------+------+-------------------------------------------+
| host         | user | password                                  |
+--------------+------+-------------------------------------------+
| localhost    | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| 192.168.1.12 | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| %            | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+--------------+------+-------------------------------------------+
3 rows in set (0.00 sec)

这样机器就可以以用户名root密码root远程访问该机器上的MySql.

3、实现远程连接(改表法)

use mysql;

update user set host = '%' where user = 'root';

这样在远端就可以通过root用户访问Mysql.

--------------------------

参考文章:http://www.jb51.net/article/31902.htm

具体步骤:登陆到MySQL
首先 use MySQL;
按照别人提供的方式update的时候,出现错误。
MySQL> update user set host='%' where user = 'root';
ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'
然后查看了下数据库的host信息如下:

MySQL> select host from user where user = 'root';
+-----------------------+
| host |
+-----------------------+
| % |
| 127.0.0.1 |
| localhost.localdomain |
+-----------------------+
3 rows in set (0.00 sec)
host已经有了%这个值,所以直接运行命令:

MySQL>flush privileges; 

 flush privileges;的意思---->:mysql 新设置用户或更改密码后需用flush privileges刷新MySQL的系统权限相关表,否则会出现拒绝访问,还有一种方法,就是重新启动mysql服务器,来使新设置生效。­

 

 

 

posted @ 2013-05-09 16:24  高山-景行  阅读(242)  评论(0编辑  收藏  举报