How to use MySQL commands to change password

MySQL is one of the most common relational database management systems. It is open source and easy to use and manage. For MySQL administrators, password management is very important because the database may hold important information. This article will introduce how to use MySQL commands to change passwords.

MySQL provides a variety of methods to change passwords. Here are some of the methods:

1. Use the mysqladmin command to change the password

mysqladmin is a command line utility used to manage MySQL servers. Use this command line utility to change MySQL user passwords.

First, you need to log in to MySQL as an administrator. Enter the following command:

mysql -u root -p

Next, enter the administrator password and press Enter.

Now, enter the following command to change the password:

mysqladmin -u root -p password newpassword

Where, newpassword is the new password, you can replace it with any password you want. Note that if you are using a Windows operating system, the command may need to be run from a command prompt.

2. Use the SET PASSWORD command

You can also modify the MySQL user password by using the SET PASSWORD command. This command allows you to specify a user and password.

First, log in to MySQL as an administrator. Enter the following command:

mysql -u root -p

Next, enter the administrator password and press Enter.

Now, enter the following command to change the password:

SET PASSWORD FOR 'user'@'hostname' = PASSWORD('newpassword');

Where user is the MySQL user whose password you want to change, hostname is the MySQL host name, and newpassword is the new password.

For example, if you want to change the password of a user named user1, and the MySQL host name is localhost, you can use the following command:

SET PASSWORD FOR 'user1'@'localhost' = PASSWORD('newpassword');

3. Directly modify the password in the MySQl user table

The last method is to directly modify the password in the MySQL user table. This is not a recommended method as it requires direct editing of MySQL user tables. In addition, if you accidentally modify other fields, you may be unable to access MySQL.

First, log in to MySQL as an administrator. Enter the following command:

mysql -u root -p

Next, enter the administrator password and press Enter.

Now, enter the following command to change the password:

UPDATE mysql.user SET Password=PASSWORD('newpassword') WHERE User='user' AND Host='hostname';

Where user is the MySQL user whose password you want to change, hostname is the MySQL host name, and newpassword is the new password.

For example, if you want to change the password of a user named user1, and the MySQL host name is localhost, you can use the following command:

UPDATE mysql.user SET Password=PASSWORD('newpassword') WHERE User='user1' AND Host='localhost';

Note: Before using this method, be sure to back up the MySQL user surface.

Summary

Changing MySQL password is one of the necessary skills for MySQL administrators. The MySQL user password can be modified using the mysqladmin command, the SET PASSWORD command, or directly modifying the MySQL user table. However, it is recommended to use the mysqladmin command or the SET PASSWORD command because these methods are officially supported and are more secure and reliable.

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