To reset MySQL's root password, follow the following steps: 1. Stop the MySQL server, use sudo systemctl stop mysql or sudo systemctl stop mysqld; 2. Start MySQL in --skip-grant-tables mode, execute sudo mysqld --skip-grant-tables &; 3. Log in to MySQL and execute the corresponding SQL command to modify the password according to the version, such as FLUSH PRIVILEGES; ALTER USER 'root'@'localhost' IDENTIFIED BY 'your_new_password'; or UPDATE mysql.user SET authentication_string=PASSWORD('your_new_password') WHERE User='root'; FLUSH PRIVILEGES; 4. Restart MySQL service normally, exit the MySQL shell first, then use sudo kill $(pgrep mysqld) to stop the temporary instance, and finally use sudo systemctl to restart the service.
If you've lost the root password for your MySQL server, don't panic — it's possible to reset it without too much trouble. The key is to temporarily bypass the normal authentication system so you can set a new password. This process works best if you have access to the server machine and sudo privileges.
Step 1: Stop the MySQL Server
Before you can reset the password, you need to stop the running MySQL instance. If it's currently active, stopping it will allow you to restart it in a special mode.
-
On most Linux systems, you can do this with:
sudo systemctl stop mysql
Or, if you're on a system using
mysqld:
sudo systemctl stop mysqld
Once the service is stopped, you're ready to move on to starting MySQL without loading the usual security restrictions.
Step 2: Start MySQL in Skip-Grant-Tables Mode
This step is cruel. Starting MySQL with the --skip-grant-tables option tells it not to load the permission system, which means you can log in without a password.
You can start it manually like this:
sudo mysqld --skip-grant-tables &
(The
&at the end sends the process to the background.)
Now you'll be able to connect to MySQL as root without any password.
Note: Make sure no other users or applications are trying to access the database during this time, as this leaves it vulnerable.
Step 3: Log in and Change the Password
With MySQL running in safe mode, connect to it:
mysql -u root
You'll go straight into the MySQL prompt. From there, run the following SQL commands to update the root password.
For MySQL 5.7 or 8.0:
FLUSH PRIVILEGES; ALTER USER 'root'@'localhost' IDENTIFIED BY 'your_new_password';
If you're using an older version:
UPDATE mysql.user SET authentication_string=PASSWORD('your_new_password') WHERE User='root'; FLUSH PRIVILEGES;
Make sure to replace 'your_new_password' with something secure.
Step 4: Restart MySQL Normally
After setting the new password, shut down the temporary MySQL instance and restart the service normally.
First, exit the MySQL shell:
exit;
Then stop the manual instance:
sudo kill $(pgrep mysqld)
And restart the service:
sudo systemctl start mysql
Or again, use mysqld instead if that's what your system uses.
Try logging back in with your new password:
mysql -u root -p
That's basically it. It's a straightforward process once you know the steps, but easy to forget if you haven't done it in a while. Just remember to always keep your credentials secure afterward — resetting passwords shouldn't be a regular thing.
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