3.2. What. Quoting from the Linux-PAM System Administrator's Guide: "It is the purpose of the Linux-PAM project to separate the development of privilege granting software from the development of secure and appropriate authentication schemes.This is accomplished by providing a library of functions that an application may use to request that a user be authenticated."

Linux Network Configuration - YoLinux.com: Linux Tutorials This Linux tutorial covers TCP/IP networking, network administration and system configuration basics. Linux can support multiple network devices. The device names are numbered and begin at zero and count upwards. Pluggable Authentication Modules for Linux (TCP Wrappers) pam_env(8) - Linux man page The pam_env PAM module allows the (un)setting of environment variables. Supported is the use of previously set environment variables as well as PAM_ITEMs such as PAM_RHOST. pam_env(8) - Linux …

The libraries for PAM are available at http://www.kernel.org/pub/linux/libs/pam/. This is the primary distribution website for the Linux-PAM project, containing information on various PAM modules, frequently asked questions, and additional PAM documentation.

The pam_ldap module is a Pluggable Authentication Module (PAM) which provides for authentication, authorization and password changing against LDAP servers.. Features of the PADL pam_ldap module include support for transport layer security, SASL authentication, directory server-enforced password policy, and host- and group- based logon authorization. Linux Knowledge Base and Tutorial

A Linux-PAM page

Jan 21, 2013 pam_pwhistory: PAM module to remember last passwords NAME. pam_pwhistory - PAM module to remember last passwords SYNOPSIS pam_pwhistory.so [debug] [use_authtok] [enforce_for_root] [remember=N] [retry=N] [authtok_type=STRING] DESCRIPTION. This module saves the last passwords for each user in order to force password change history and keep the user from alternating between the same password too frequently. How To Set Up Multi-Factor Authentication for SSH on Jan 10, 2017