This could be because the older operating systems use a different type of boot loader ... in the first command. Boot configuration database represents nothing but the BCD files.

How to Use an SSH Config File on macOS for Easier Connections to Your Data Center Servers Your email has been sent You probably use SSH to connect to remote machines for admin purposes.

BCD or Boot Configuration Data is a firmware-independent database file which has boot-time configuration ... In the Command Prompt, type the following command and hit Enter: bcdboot c:\windows ...