yubikey workstation setup

source/resources/apps/yubikey/README.md

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+sudo yubikey-personalization-gui
+Use:
+- HMAC-SHA1
+- Configuration slot 1
+- Require user input (button press)
+- Yubikey unprotected (keep it that way)
+- Click <Generate>
+Set it to use challenge response (no password):
+sudo su -
+#ykpersonalize -1 -ochal-resp -ochal-hmac -ohmac-lt64 -oserial-api-visible
+mkdir ~/.yubico
+ykpamcfg -1 -v
+mv .yubico/ /home/forksand/
+chown -R forksand:forksand /home/forksand/.yubico/
+vim /etc/pam.d/common-auth
+