How to Fix \'Access denied for user \'root\'@\'localhost\' (using password: NO)\' Error When Resetting MySQL Root Password?

Troubleshooting Access Denied Error for 'root'@'localhost'

Scenario:

When attempting to reset the password for the MySQL user 'root', you encounter the error:

Access denied for user 'root'@'localhost' (using password: NO)

Investigation:

This error indicates a permissions issue preventing you from modifying user settings. The error occurs despite you having granted all privileges to 'root'@'localhost'.

Solution:

To resolve this issue, follow these steps:

1. Reconnect to MySQL using the existing credentials:

$ mysql -u root -p

2. Enter the current password.
3. For security reasons, MySQL masks the password prompt with asterisks, so you need to type the password blindly (which will appear as a blank line).
4. Type the following command as a single line:

mysqladmin -u root -p password foo

5. The prompt will ask you to confirm the new password. Enter it twice.

Explanation:

The command mysqladmin allows you to configure MySQL server settings without logging in. In this case, the -p option prompts for a password, and the password argument specifies that we are setting the user's password. The word "password" in the command should be typed literally, as it's a command and not the actual password itself.

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