system-auth - Common configuration file for PAMified services
The purpose of this configuration file is to provide common configuration file for all applications and service daemons calling PAM library.
The system-auth configuration file is included from all individual service configuration files with the help of the include directive.
Conversely there should not be any modules after include directive in the individual service files in authaccount and password sections otherwise they could be bypassed.
The three Linux-PAM Guides, for system administrators, module developers, and application developers.