PAM configuration file

PAM (Pluggable Authentication Modules) configuration files manage how a computer system verifies user identities for different services. They define the rules and methods used during login, password changes, or access permissions, allowing administrators to customize security policies without altering core system code. Think of these files as a flexible set of instructions that determine who can access what, and how, based on various authentication methods like passwords, fingerprint scans, or security tokens. This modular approach ensures consistent, adaptable, and secure user authentication across the system.