[root@centos7 ~]# ls /etc/pam.d
atd                     login              smtp
chfn                    other              smtp.postfix
chsh                    passwd             sshd
config-util             password-auth      su
crond                   password-auth-ac   sudo
cups                    pluto              sudo-i
fingerprint-auth        polkit-1           su-l
fingerprint-auth-ac     postlogin          system-auth
gdm-autologin           postlogin-ac       system-auth-ac
gdm-fingerprint         ppp                system-config-language
gdm-launch-environment  remote             systemd-user
gdm-password            runuser            vlock
gdm-pin                 runuser-l          vmtoolsd
gdm-smartcard           setup              xserver
ksu                     smartcard-auth
liveinst                smartcard-auth-ac