Article 6NAGP users not able to login to linux server

users not able to login to linux server

by
pankaj2111
from LinuxQuestions.org on (#6NAGP)
users are getting error as access denied , could you please help on this

we find the log as below

login: pam_succeed_if(login:auth): error retrieving information about user
login: pam_unix(login:auth): check pass; user unknown
login: pam_unix(login:auth): authentication failure; logname=LOGIN uid=0 euid=0 tty=tty1 ruser= rhost=
login: pam_succeed_if(login:auth): error retrieving information about user
login: FAILED LOGIN 1 FROM (null) FOR , User not known to the underlying authentication module
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