How MYSQL deletes anonymous users (improves security)

Source: Internet
Author: User

After MySQL is installed, a root user and an anonymous user will be automatically created, which is ignored by many users, this is probably because anonymous users are set to be only available locally by default.

However, if MySQL is to be used as a database for Web servers, it may be costly to ignore this anonymous user. By default, this anonymous user has almost the same permissions as root on localhost. It is very likely that a visitor uploads a PHP file, creates a new user with this PHP file, gives him a higher permission, and then uses this new user to connect to the MySQL server, manage the MySQL of the server.

The DELETE command is as follows:

Copy codeThe Code is as follows:
MySQL> UPDATE user set password = PASSWORD ('your password') where user = '';
MySQL> flush privileges;


Follow these steps to delete anonymous users in mysql:

[Root @ sample ~] # Mysql-u root-p login using the password to log on as root
Enter password: Enter password here

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; users view user information
+ ------ + ---------------------------- +
| 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 = ''; anonymous deletes Anonymous Users
Query OK, 2 rows affected (0.17 sec)

Mysql> select user, host from mysql. user; users view user information
+ ------ + ---------------------------- +
| User | host |
+ ------ + ---------------------------- +
| Root | localhost |
| Root | sample.centospub.com |
+ ------ + ---------------------------- +
2 rows in set (0.00 sec)

Mysql> exit MySQL Server
Bye

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.