Single PAM fallback config file to be used in /etc to allow
bootstrapping of a system with an empty /etc.
--- /dev/null
+# This file is part of systemd.
+
+auth sufficient pam_unix.so nullok try_first_pass
+
+account required pam_nologin.so
+account sufficient pam_unix.so
+
+password sufficient pam_unix.so nullok sha512 shadow try_first_pass try_authtok
+
+-session optional pam_loginuid.so
+-session optional pam_systemd.so
+session required pam_limits.so
+session sufficient pam_unix.so