I was held on 'login' (with CrackLib), saying "bash: /etc/pam.d/login: No such file or directory"
According to the "Warning" near the bottom on the same page, reinstalled Shadow-4.0.9 with "--without-libpam" and also moved the /etc/login.defs.orig backup file to /etc/login.defs
Now I can't login LFS 6.1 with following warning;
LoginAM Failure, aborting: Critical error - immediate abort
I did it twice including removing the source tree of Shadow-4.0.9 and download new packages from Internet as well
On BLFS 6.1 Section Shadow-4.0.9
Chapter 4. Security
http://www.linuxfromscratch.org/blfs/view/stable/postlfs/shadow.html
The step in creating /etc/pam.d directory could not be found compelling me stopped in the middle on that page. As a chain action it caused "unable to login" I think that on chroot environment after running
# install -v -m755 -d /etc/pam.d
and complete that page, the "login problem" will be solved.