RSA private key file not found: /var/lib/mysql//private_key.pem. Some authentication plugins will not work

Hello! It seems like you are encountering an error related to RSA private key file not found in MySQL. This error message indicates that the specified private key file (private_key.pem) could not be located in the given path (/var/lib/mysql/).

To resolve this issue, you can try the following steps:

1. Check the file path: Make sure that the private_key.pem file exists in the specified directory (/var/lib/mysql/). Double-check the file name and location to ensure accuracy.

2. Verify file permissions: Ensure that the MySQL user has sufficient permissions to access the private key file. You can use the following command to check and set the appropriate permissions:

   chmod 400 /var/lib/mysql/private_key.pem

3. Restart MySQL service: After making any changes, it's important to restart the MySQL service to apply the modifications. You can use the following command to restart MySQL:

   sudo service mysql restart

By performing these steps, you should be able to resolve the "RSA private key file not found" error in MySQL. If the issue persists or if you have further questions, please let me know!