/usr/share/doc-base/pam-admin-guide is in libpam-doc 1.1.3-7ubuntu2.3.
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Title: The Linux-PAM System Administrators' Guide
Author: Andrew G. Morgan <morgan@linux.kernel.org>
Abstract: This manual documents what a system administrator needs to know
about the Linux-PAM library. It covers the correct syntax of the PAM
configuration file and discusses strategies for maintaining a secure system.
Section: System/Administration
Format: HTML
Index: /usr/share/doc/libpam-doc/html/Linux-PAM_SAG.html
Files: /usr/share/doc/libpam-doc/html/Linux-PAM_SAG.html /usr/share/doc/libpam-doc/html/sag-*.html
Format: text
Files: /usr/share/doc/libpam-doc/txt/Linux-PAM_SAG.txt.gz
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