I've been trying to add more security to passwords, etc. I did the following things (in Ubuntu 14.04.2 LTS)
/etc/pam.d/common-auth, added (as first line)
auth required pam_tally.so onerr=fail deny=3 unlock_time=3600 magic_root
password [success=1 default=ignore] pam_unix.so obscure sha512 minlen=14 remember=24 audit
PASS_MAX_DAYS 60 PASS_MIN_DAYS 1 PASS_WARN_AGE 14 LOG_OK_LOGINS yes SULOG_FILE /var/log/sulog SYSLOG_SU_ENAB yes SYSLOG_SG_ENAB yes
I cannot log in from either the GUI or the text console. I dropped into the root shell from recovery mode, did
mount -rw -o / and tried both changing my password and creating a new user, no joy.
What did I screw up? Please and thank you.