Yep, I followed the guide here: https://github.com/drduh/YubiKey-Guide https://github.com/drduh/YubiKey-Guide Means I can SSH into any box that has that key on

Yep, I followed the guide here: https://github.com/drduh/YubiKey-Guide https://github.com/drduh/YubiKey-Guide Means I can SSH into any box that has that key on it, or push/pull repos from anywhere as long as I have a yubikey with me. I also used https://www.jabberwocky.com/software/paperkey/ https://www.jabberwocky.com/software/paperkey/ to make a backup, and have that and a spare yubikey stored elsewhere securely. (You can create the key on the yubikey directly, but then I think it's not possible to have a backup yubikey)