Why Am I Getting \'Access Denied\' Errors After Changing the MySQL Root Password?

MySQL Root Password Change: Troubleshooting Access Denied Errors After Update

Attempting to change the MySQL root password can be a common task for system administrators. However, some users encounter the persistent "Access denied" error message after resetting the password using mysqld_safe --skip-grant-tables.

Troubleshooting Steps

If you are facing this issue, consider the following troubleshooting steps:

1. Check Password Reset Syntax

Ensure that you used the correct syntax for updating the password. The query should be:

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

2. Grant Privileges

After updating the password, remember to grant privileges to the root user again. This can be done using:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION;
FLUSH PRIVILEGES;

3. Use mysql_config_editor

Alternatively, you can use the mysql_config_editor utility to modify the password in the configuration file:

mysql_config_editor --update --user=root --password=mypass

Restart the MySQL daemon after making these changes.

4. Delete Unix Socket

If other methods fail, try deleting the Unix socket file located at:

/var/run/mysqld/mysqld.sock

Restart MySQL after this step.

5. Reinstall MySQL

As a last resort, you can attempt to reinstall MySQL. Be sure to completely remove the existing installation, including the my.cnf file.

Conclusion

By following these troubleshooting steps, you should be able to resolve the "Access denied" error after changing the MySQL root password. Remember to check the password reset syntax, grant privileges, and restart the daemon after making any changes.

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