add the old snippet md files

old_snippets/init-yubikey.md

@@ -0,0 +1,25 @@
+---
+title: "init yubikey"
+date: 2021-07-16T12:29:01+02:00
+draft: false
+snippet_types:
+- yubikey
+- gpg
+---
+
+Some servers at work require yubikey authentication and for some reason I have
+to fetch and verify every time I want to use it.
+
+```shell
+$ 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
+```