Debian Linux - Enable 2-Factor Authentication or Password-less Log In on Kali Linux with Yubikey

In this step-by-step guide, you will learn how to configure two-factor authentication (2FA) or password-less authentication on a Debian Linux system using a Yubikey. We will walk you through the necessary steps to set up and install the required components, configure the Yubikey, and enable 2FA or password-less authentication for your user account. By the end of this tutorial, you will have a secure and convenient authentication mechanism for your Debian Linux system.
➡️ Step-by-step instruction: bit.ly/3rB3Zdh
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[@jasonpitcher6424]

Any suggestions on what to do if you've successfully gone through all of the steps up to the point of opening a second terminal to test sudo authentication with the key, but in the test terminal window when you use sudo, it prompts for a password but the key never flashes... and wont take the sudo password. I can't get past this point for some reason. Issuing sudo never actually calls the Yubikey. I've verified a dozen times that the sudo file at /etc/pam.d has the proper syntax for this.

[@sysadmin102]

What distro are you using?

[@jasonpitcher6424]

@@sysadmin102 I’ve tried it on both vanilla Debian and on Kali with the same results. I feel like it’s some change made within the newest Debian release… this process worked for me a couple of years ago on Debian 11 without problem.

[@PepperGamesCo]

Hello, good video, I want to ask you, the key has to have a pin to install it and if I use it in Kali, can I continue using it in other accounts

[@sysadmin102]

The PIN just so not everyone can access the key without the PIN. The PIN stored on Yubikey, not on your computer

[@PepperGamesCo]

Thanks for your answer, but I can still continue using it in email or Windows, etc.

[@sysadmin102]

@@PepperGamesCo I don’t understand your question. The key is just a second form of authentication. You can use it with whatever system or program supports it.