Install libapache2-mod-auth-pubtkt by entering the following commands in the terminal:
sudo apt update sudo apt install libapache2-mod-auth-pubtkt
Description:
key-based single-sign-on authentication module for Apache
mod_auth_pubtkt is an Apache module that authenticates a user based on a cookie with a ticket that has been issued by a central login server and digitally signed using either RSA or DSA. This means that only the trusted login server has the private key required to generate tickets, while web servers only need the corresponding public key to verify them.
Homepage: https://neon1.net/mod_auth_pubtkt/
Version: 0.11-1build1
Section: universe/httpd