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HomeDatabaseMysql TutorialMYSQL删除匿名用户的方法(提高安全性)_MySQL

bitsCN.com 安装完MySQL以后会自动创建一个root用户和一个匿名用户,对于root大家都非常注意,而这个匿名用户很多人都会忽略,大概是因为匿名用户默认设定为只能在本地使用的缘故吧。

  但如果MySQL要作为数据库提供给Web服务器使用的话,忽略这个匿名用户的代价可能相当惨重。因为在默认设置下,这个匿名用户在localhost上几乎拥有和root一样的权限。很可能因为访问者上传一个PHP文件,用这个PHP文件创建一个新用户,并给他一个较高的权限,然后用这个新用户连接到服务器的MySQL,对该服务器的MySQL进行管理。

  删除命令如下:


  MySQL>UPDATE user set password=PASSWORD('your password') where user='';
  MySQL>FLUSH PRIVILEGES;


mysql中删除匿名用户详细步骤如下:

[root@sample ~]#mysql -u root -p ← 通过密码用root登录
Enter password: ← 在这里输入密码

Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 7 to server version: 4.1.20

Type 'help;' or '/h' for help. Type '/c' to clear the buffer.

mysql>select user,host from mysql.user;  ← 查看用户信息
+------+----------------------------+
| user | host         |
+------+----------------------------+
|   | localhost       |
| root | localhost       |
|   | sample.centospub.com |
| root | sample.centospub.com  |
+------+----------------------------+
4 rows in set (0.02 sec)

mysql> delete from mysql.user where user='';  ← 删除匿名用户
Query OK, 2 rows affected (0.17 sec)

mysql> select user,host from mysql.user;  ← 查看用户信息
+------+----------------------------+
| user | host         |
+------+----------------------------+
| root | localhost      |
| root | sample.centospub.com |
+------+----------------------------+
2 rows in set (0.00 sec)

mysql> exit  ← 退出MySQL服务器
ByebitsCN.com

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