I administer a Linux Server with Red Hat 6.2 and yesterday, suddenly, I cannot login in the console as root: after typing the password, the system answer "Login incorrect". I can login as any valid user and su, in the console and in the LAN terminals.
The error in the log is
"Jul 18 14:26:52 mail PAM-securetty: Error opening /etc/securetty
Jul 18 14:26:56 mail login: FAILED LOGIN SESSION FROM (null) FOR root, Error in service module".
The securetty is OK.
If I make a "ps" command, the list don't show any TTY number (only "?").
If I make a "w" command, the list is correct, saying I'm at "pts/0" tty.
I think there is any wrong and the system cannot identify the TTY number (ps reports "?" TTY) and so I have root access only in the console (/etc/securetty), root cannot log in because the system don't know that root is in the console.
Any idea which files must I review?
Jefe de Servicio de Informatica
INSALUD GAP Area 3
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