mmillerTestbed:~# login mmiller2
Password:
Last login: Sun Mar 20 18:23:26 EDT 2016 on pts/4
Welcome to Ubuntu precise (12.04.4 LTS) (GNU/Linux 3.2.0-64-generic x86_64)
su: Authentication failure
(Ignored)
su: Module is unknown

Mar 20 18:34:14 mmillerTestbed login[21801]: pam_unix(login:session): session opened for user mmiller2 by root(uid=0)
Mar 20 18:34:14 mmillerTestbed sudo: mmiller2 : TTY=pts/11 ; PWD=/home/jail/home/mmiller2 ; USER=root ; COMMAND=/usr/sbin/chroot /home/jail /bin/su - mmiller2
Mar 20 18:34:14 mmillerTestbed sudo: pam_unix(sudo:session): session opened for user root by root(uid=1023)
Mar 20 18:34:15 mmillerTestbed sudo: pam_unix(sudo:session): session closed for user root
Mar 20 18:34:15 mmillerTestbed login[21801]: pam_unix(login:session): session closed for user mmiller2