Should your instance satisfies both of these conditions, then the ethtool -i ethn command need to display which the module is in use about the network interface. pem or .crt file extension. Should you be unsure which file to work with, open up the documents using a text editor https://azure-support12220.blogs100.com/27242841/how-magento-2-migration-can-save-you-time-stress-and-money