/etc/pam.d or /etc/pam.conf Configuration information is placed in /etc/pam.d or /etc/pam.conf depending on the application that is using PAM. Below are example files of each type: # Begin /etc/pam.d/other auth required pam_unix.so nullok account required pam_unix.so session required pam_unix.so password required pam_unix.so nullok # End /etc/pam.d/other # Begin /etc/pam.conf other auth required pam_unix.so nullok other account required pam_unix.so other session required pam_unix.so other password required pam_unix.so nullok # End /etc/pam.conf The PAM man page (man pam) provides a good starting point for descriptions of fields and allowable entries. The Linux-PAM guide for system administrators is recommended for further reading.