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