Question

如何设置mysql 允许远程连接

Answer 1

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.

Answer 2

1。改表法。
可能是你的帐号不允许从远程登陆，只能在localhost。这个时候只要在localhost的那台电脑，登入mysql后，更改 "mysql" 数据库里的 "user" 表里的 "host" 项，从"localhost"改称"%"
mysql -u root -pvmwaremysql>use mysql;mysql>update user set host = '%' where user = 'root';mysql>select host, user from user;

2. 授权法。
例如，你想myuser使用mypassword从任何主机连接到mysql服务器的话。
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;如果你想允许用户myuser从ip为192.168.1.3的主机连接到mysql服务器，并使用mypassword作为密码 GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;