pam_stack.so configuration

Some systems generate, from a configuration tool, an file that is a central definition of how to authenticate a user. This file is typically called system-auth which is included by pam_stack.so:

#%PAM-1.0
auth       required     /lib/security/pam_stack.so service=system-auth
account    required     /lib/security/pam_stack.so service=system-auth
password   required     /lib/security/pam_stack.so service=system-auth
session    required     /lib/security/pam_stack.so service=system-auth