当你跑的时候
mysql -u bill -p
得到这个错误
ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
mysqld希望您连接为
bill@localhost
尝试创建
帐单@localhost
CREATE USER bill@localhost IDENTIFIED BY 'passpass';
grant all privileges on *.* to bill@localhost with grant option;
如果要远程连接,必须使用TCP/IP指定DNS名称、公用IP或127.0.0.1:
mysql -u bill -p -hmydb@mydomain.com
mysql -u bill -p -h10.1.2.30
mysql -u bill -p -h127.0.0.1 --protocol=TCP
登录后,请运行此
SELECT USER(),CURRENT_USER();
USER()
报告您如何尝试在mysql中进行身份验证
CURRENT_USER()
报告如何从
mysql.user用户
桌子
这将使您更好地了解如何以及为什么允许您登录mysql。为什么要知道这个观点很重要?它与用户身份验证排序协议有关。
下面是一个例子:我将在我的桌面mysql上创建一个匿名用户
mysql> select user,host from mysql.user;
+---------+-----------+
| user | host |
+---------+-----------+
| lwdba | % |
| mywife | % |
| lwdba | 127.0.0.1 |
| root | 127.0.0.1 |
| lwdba | localhost |
| root | localhost |
| vanilla | localhost |
+---------+-----------+
7 rows in set (0.00 sec)
mysql> grant all on *.* to x@'%';
Query OK, 0 rows affected (0.02 sec)
mysql> select user,host from mysql.user;
+---------+-----------+
| user | host |
+---------+-----------+
| lwdba | % |
| mywife | % |
| x | % |
| lwdba | 127.0.0.1 |
| root | 127.0.0.1 |
| lwdba | localhost |
| root | localhost |
| vanilla | localhost |
+---------+-----------+
8 rows in set (0.00 sec)
mysql> update mysql.user set user='' where user='x';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql> select user,host from mysql.user;
+---------+-----------+
| user | host |
+---------+-----------+
| | % |
| lwdba | % |
| mywife | % |
| lwdba | 127.0.0.1 |
| root | 127.0.0.1 |
| lwdba | localhost |
| root | localhost |
| vanilla | localhost |
+---------+-----------+
8 rows in set (0.00 sec)
mysql>
确定以匿名用户身份登录:
C:\MySQL_5.5.12>mysql -urol -Dtest -h127.0.0.1 --protocol=TCP
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 5.5.12-log MySQL Community Server (GPL)
Copyright (c) 2000, 2010, 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.
mysql> select user(),current_user();
+---------------+----------------+
| user() | current_user() |
+---------------+----------------+
| rol@localhost | @% |
+---------------+----------------+
1 row in set (0.00 sec)
mysql>
认证顺序非常严格。它从最具体到最少地检查。
I wrote about this authentiation style in the DBA StackExchange
是的。
必要时不要忘记显式调用tcp作为mysql客户端的协议。
