Pluggable Authentication Modules: Threat or Menace?
PAM is one of the most misunderstood parts of systems administration. Many sysadmins live with authentication problems rather than risk making them worse. PAM's very nature makes it unlike any other Unix access control system.
If you have PAM misery or PAM mysteries, you need PAM Mastery!
With PAM Mastery, you'll understand:
Transform PAM from a headache to an ally with PAM Mastery