Install libapache2-mod-authn-yubikey by entering the following commands in the terminal:
sudo apt update sudo apt install libapache2-mod-authn-yubikey
Description:
Yubikey authentication provider for Apache
The mod_authn_yubikey module is an authentication provider for the Apache platform. It leverages the YubiKey which is a small token that acts as an authentication device. . The mod_authn_yubikey module provides one and two factor authentication for your website and is completely independent from the technology that implements your website (like CGI, JSP or PHP).
Homepage: http://www.coffeecrew.org/software/yubikey-apache-plugin/
Version: 1.0-1.2ubuntu1
Section: universe/web