It really depends on what you want to do with the yubikeys. If you're just using the PGP functionality (like SSH-ing and signing git commits) all you have to do

It really depends on what you want to do with the yubikeys. If you're just using the PGP functionality (like SSH-ing and signing git commits) all you have to do is upload the same private (sub)keys to the two yubikeys and they'll be functionally the same*. I wouldn't know about other (more advanced) features though. If you follow DrDuh's guide, you should be able to set up the yubikeys in the way I described. I also created some provisioning scripts that automate the whole process which you should be able to use to provision the PGP applet: https://github.com/santiago-mooser/yubikey-provisioning-scripts https://github.com/santiago-mooser/yubikey-provisioning-scri... Make sure to enable the export of the private key though!