I don’t have any such keys.

Don’t forget the Celtic influence that gave English the meaningless do.

Just in case there’s someone here who’d like to know: that “cold cupboard” technology that preceded the refrigerator in people’s homes is called Eisschrank in German.

Is there any reason to do full disk encryption, vs encrypting a single partiton or a folder with eCryptfs?

One obvious reason is that it just is very simple to encrypt the entire disk and be done with it.

ELI5: Why would a VPN provider ever need to have their own app? They don’t have their own VPN technology, do they?