Linux PAM Security Administration - What Is PAM

PAM, or Pluggable Authentication Module, is a crucial component in Linux systems that provides dynamic authentication support. It acts as an intermediary between applications and the native authentication system, allowing for flexible integration without modifying application code. PAM is essential for both local and remote authentication, supporting various services like Apache, NFS, and third-party directories such as LDAP. Configuration can be centralized or service-specific, with a strong emphasis on security to prevent login issues. PAM logs activities to specific files to maintain security and prevent unauthorized access.

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