MySQL passwords do not work after upgrade
Posted by on 05 July 2018 04:01 PM
This article describes a problem that occurs after a server is upgraded to MySQL 5.6.5 or later, and how to resolve it.
When you try to access a database on a server running MySQL 5.6.5 or later the login fails, even though you are using the correct username and password.
For example, if you are running WordPress on your site, you see the following error message:
Error establishing a database connection
Other web applications may display similar messages about database connection errors.
This problem occurs because MySQL 5.6.5 and later versions use a new hashing method for user passwords. These newer MySQL versions do not support the hash method that was used in older versions of MySQL to store passwords, so logins fail.
To resolve this problem, you must delete and recreate the database user. When you do this, MySQL uses the new hash method to store the password, and the database user can log in again.
To do this, follow these steps: