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3.4.1. Installation
In order to authenticate to a Kerberos Realm, the krb5-user and libpam-krb5 packages are needed, along with a few others that are not strictly necessary but make life easier. To install the packages enter the following in a terminal prompt:
sudo apt install krb5-user libpam-krb5 libpam-ccreds auth-client-config
The auth-client-config package allows simple configuration of PAM for authentication from multiple sources, and the libpam-ccreds will cache authentication credentials allowing you to login in case the Key Distribution Center (KDC) is unavailable. This package is also useful for laptops that may authenticate using Kerberos while on the corporate network, but will need to be accessed off the network as well.