Modify mysql root password

MySQL is an open source relational database management system that is widely used in Internet applications and enterprise-level data management. In MySQL, the root account is the highest authority account and can perform all operations. If you forget your root password or need to change your password, how can you do it?

This article will introduce how to change the MySQL root password.

Prerequisite: MySQL has been installed and has root permissions.

Step 1: Stop the MySQL service

First stop the MySQL service, otherwise problems may occur when changing the password. You can stop the MySQL service through the following command:

sudo service mysql stop

Step 2: Start the MySQL service by skipping the permission table

The user permission information of MySQL is stored in the user table of the mysql database, so we The MySQL service needs to be started by skipping the permission table.

Enter the following command on the command line:

sudo mysqld_safe --skip-grant-tables &

In this command, the --skip-grant-tables option tells MySQL to skip checking the permission table, and the & symbol allows MySQL to run in the background.

Step 3: Log in to MySQL

Next we need to log in to MySQL and enter the following command:

mysql -u root

At this time, you will enter the command line mode of MySQL, but at this time the root The account does not have a password. Therefore, you need to execute the following command to change the password:

UPDATE mysql.user SET authentication_string=PASSWORD('your_new_password') WHERE User='root';

Replace your_new_password with your new password.

If you are using a lower version of MySQL, you can use the following command:

UPDATE mysql.user SET Password=PASSWORD('your_new_password') WHERE User='root';

Step 4: Refresh the permissions table

After modifying the MySQL root password, we need to refresh the permissions table to make it effective:

FLUSH PRIVILEGES;

Step 5: Exit MySQL

We have completed the modification of the root password, and now we need to exit MySQL:

exit;

Step 6: Restart MySQL service

After completing the password change, we need to restart the MySQL service and enter the following command:

sudo service mysql start

At this point, changing the MySQL root password is completed. In daily use, we should often change the password to ensure the security of the database.

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