Install libpam-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libpam-doc
Description:
Documentation of PAM
Contains documentation (in HTML, ASCII, and PostScript format) for libpam, the Pluggable Authentication Modules library, a library that enables the local system administrator to choose how applications authenticate users.
Homepage: http://www.linux-pam.org/
Version: 1.1.8-3.6ubuntu2
Section: doc