Init yubikey - 07-16-21

Some servers at work require yubikey authentication and for some reason I have to fetch and verify every time I want to use it.

$ export SSH_AUTH_SOCK=~/.gnupg/S.gpg-agent.ssh
$ gpg --card-edit

fetch
verify
enter key
via pass yubikey
quit

$ ssh-add -L
$ ssh travis@serverX
\- [ yubikey, gpg ]