# ll /etc/pam.d/
total 152
drwxr-xr-x 2 root root 4096 Aug 18 18:04 ./
drwxr-xr-x 199 root root 12288 Oct 29 12:15 ../
-rw-r--r-- 1 root root 179 Dec 13 2013 accountsservice
-rw-rw-r-- 1 root root 220 Oct 21 2013 atd
-rw-r--r-- 1 root root 81 Jun 8 2012 caldav
-rw-r--r-- 1 root root 384 Jul 26 2013 chfn
-rw-r--r-- 1 root root 92 Jul 26 2013 chpasswd
-rw-r--r-- 1 root root 581 Jul 26 2013 chsh
-rw-r--r-- 1 root root 1281 Aug 3 17:49 common-account
-rw-r--r-- 1 root root 1208 Aug 22 2014 common-account.pam-old
-rw-r--r-- 1 root root 1393 Aug 3 17:49 common-auth
-rw-r--r-- 1 root root 1286 Aug 22 2014 common-auth.pam-old
-rw-r--r-- 1 root root 1666 Aug 3 17:49 common-password
-rw-r--r-- 1 root root 1588 Aug 22 2014 common-password.pam-old
-rw-r--r-- 1 root root 1590 Aug 3 17:49 common-session
-rw-r--r-- 1 root root 1510 Aug 3 17:49 common-session-noninteractive
-rw-r--r-- 1 root root 1475 Aug 22 2014 common-session-noninteractive.pam-old
-rw-r--r-- 1 root root 1555 Aug 22 2014 common-session.pam-old
-rw-r--r-- 1 root root 527 Feb 9 2013 cron
-rw-r--r-- 1 root root 69 Jul 16 2013 cups-daemon
-rw-r--r-- 1 root root 752 Apr 10 2014 lightdm
-rw-r--r-- 1 root root 510 Aug 21 2013 lightdm-autologin
-rw-r--r-- 1 root root 636 Apr 10 2014 lightdm-greeter
-rw-r--r-- 1 root root 4788 Jul 26 2013 login
-rw-r--r-- 1 root root 92 Jul 26 2013 newusers
-rw-r--r-- 1 root root 520 Oct 21 2013 other
-rw-r--r-- 1 root root 92 Jul 26 2013 passwd
-rw-r--r-- 1 root root 255 Nov 3 2013 polkit-1
-rw-r--r-- 1 root root 168 Jan 22 2013 ppp
-rw-r--r-- 1 root root 84 Dec 9 2013 samba
-rw-r--r-- 1 root root 1199 Jan 4 2014 schroot
-rw-r--r-- 1 root root 2139 Apr 14 2014 sshd
-rw-r--r-- 1 root root 2305 Jul 26 2013 su
-rw-r--r-- 1 root root 239 Dec 15 2013 sudo
-rw-r--r-- 1 root root 319 May 16 2013 vsftpd