Resetting the Root Password with MySQL on windows


Whilst using WebMartix for Demos I sometimes forget the password I used to set up a system and end up having to uninstall and reinstall MySQL just because I want to reset the password. A colleague pointed out to me that on the MySQL website they have a guide on how you can easily reset the password as long as you are an administrator on the server. I’ve reposted the guide below for reference making a few changes to reflect the fact that I have a Windows 2008 R2 server.

On Windows, use the following procedure to reset the password for all MySQL root accounts:

  1. Log on to your system as Administrator.

  2. Stop the MySQL server if it is running. For a server that is running as a Windows service, type Services in the program search and select Services . Find the MySQL service in the list, right click it and choose stop.

    If your server is not running as a service, you may need to use the Task Manager to force it to stop.

  3. Create a text file containing the following statements. Replace the password with the password that you want to use.

    UPDATE mysql.user SET Password=PASSWORD('MyNewPass') 
    WHERE User='root';
    FLUSH PRIVILEGES;

    Write the UPDATE and FLUSH statements each on a single line. The UPDATE statement resets the password for all root accounts, and the FLUSH statement tells the server to reload the grant tables into memory so that it notices the password change.

  4. Save the file. For this example, the file will be named C:\mysql-init.txt.

  5. Open a console window to get to the command prompt: From the Start menu, select Run, then enter cmd as the command to be run.

  6. Start the MySQL server with the special --init-file option (notice that the backslash in the option value is doubled):

    C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --init-file=C:\\mysql-init.txt
  7. If you installed MySQL to a location other than C:\Program Files\MySQL\MySQL Server 5.1\, adjust the command accordingly.

    The server executes the contents of the file named by the --init-file option at startup, changing each root account password.

    You can also add the --console option to the command if you want server output to appear in the console window rather than in a log file.

    If you installed MySQL using the MySQL Installation Wizard, you may need to specify a --defaults-file option:

    "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld.exe"
    --defaults-file="C:\\Program Files\\MySQL\\MySQL Server 5.1\\my.ini"
    --init-file=C:\\mysql-init.txt

    The appropriate --defaults-file setting can be found using the Services Manager: From the Start menu, select Control Panel, then Administrative Tools, then Services. Find the MySQL service in the list, right-click it, and choose the Properties option. The Path to executable field contains the --defaults-file setting.

  8. After the server has started successfully, delete C:\mysql-init.txt.

You should now be able to connect to the MySQL server as root using the new password. Stop the MySQL server (you do this by opening up the task manager and stopping the mysqld.exe by right clicking) , then restart it in normal mode again. If you run the server as a service, start it from the Windows Services window. If you start the server manually, use whatever command you normally use.

Comments (5)

  1. IT_Survivor says:

    This is great and all but on server 2008R2 doesn't seem to make any difference.  I have ran these commands and still the password has not changed or been reset.  Am I missing something?  

  2. mcvilbar says:

    I could not still reset the root password using the command that you were provide...Huhuhu!

  3. moin says:

    Unfortunately after executing this command appear this message: Access is denied whereas i'm logging to my system as administrator !

    Please help me

  4. saban says:

    guys run cmd as administrator (right click -- run as administrator)

  5. i used like this says:

    mysqld.exe --defaults-file="C:/Program Files (x86)/MySQL/MySQL Server 5.0/my.ini" --init-file=C:/mysql-init.txt

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