{{Warning box| Altering the pam system authentication files can seriously effect your ability to login in to the system. Take a backup of the /etc/pam.d directory and /etc/nsswitch.conf. Have a live CD available to give access and re-apply the backup files if you make a mistake and/or get locked out}}
* /etc/nsswitch.conf (change these lines where necessary)
* /etc/nsswitch.conf (change these lines where necessary)