login to root

cd /sbin

ls pam_tally*

pam_tally2 --user=inapaks --reset

faillog -r <username>

chage -l <username>

passwd <username> # passwd -S user1 user1 LK 2014-08-17 0 99999 7 -1 (Password locked.)# passwd -S user1 user1 PS 2014-08-17 0 99999 7 -1 (Password set, SHA512 crypt.)