Kevin Kofler wrote:
- authentication keys - those are what you use to log in instead of
a password. They're one per user and machine unless you explicitly copy the private key to a different machine or user account (something you normally shouldn't do
I presume you mean only the latter part (copying the private key to another user account) is something that you shouldn't do?
I share the same ssh private key between my desktop server and my laptop (both as the same user). I don't see much reason to have two separate keys for that.