Does anyone know of a good tutorial for configuring elementaryOS with Yubikeys? I just bought a 2-pack of the Yubikey 5 NFC and would like to set up stuff like full disk encryption, lightdm login and FIDO U2F authentication support.
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I ended up collecting bits and pieces from a number of sites and checking it in as a README file in a Github repository: https://github.com/carniz/ubuntu-yubikey-setup
Hope this can help someone else who wants to configure elementaryOS with Yubikeys.
Ubuntu Linux Login Guide - Challenge Response
Enabling the Yubico PPA on Ubuntu
https://support.yubico.com/support/solutions/articles/15000010964-enabling-the-yubico-ppa-on-ubuntu
Ubuntu Linux Login Guide - U2F
https://support.yubico.com/support/solutions/articles/15000011356-ubuntu-linux-login-guide-u2f
Using Your U2F YubiKey with Linux
https://support.yubico.com/support/solutions/articles/15000006449-using-your-u2f-yubikey-with-linux
Ubuntu - Configure yubikey authentication on Linux
https://www.youtube.com/watch?v=ac65PmlzTIw
System wide two factor security Ubuntu
https://www.youtube.com/watch?v=3p5Wo9KtpAk
Let me search it for you
https://www.youtube.com/results?search_query=yubikey+ubuntu
About full disk encryption, you didn't ask for it just explained what you wanted to achieve. But is another different topic
I believe these will help,
1. Official PPA
2. YubiKey for Two-Factor Secure Shell Authentication
