Ubuntu 20.04 LTS configuring Kerberos client with PAM (take UNC Onyen server as an example) It's hard to find an article showing how to configure a Kerberos client with PAM on Ubuntu 20.04 or higher. Here is the step-by-step tutorial 0. Update apt sudo apt-get update sudo apt-get upgrade 1. Install packages and configure Kerberos source sudo apt-get install krb5-user libpam-krb5 sudo vim /etc/krb5.conf then input this and save: