MYSQL远程登录

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 *.* toroot@192.168.1.12identified 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mysql远程，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.

4 防火墙造成远程登录不上

/etc/init.d/iptables status 查看状态

/etc/init.d/iptables stop 关闭防火墙

chkconfig --level 35 iptables off 永久关闭防火墙

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