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LEARN ABOUT XFREE86

pam_securetty

PAM_SECURETTY(8)						 Linux-PAM Manual						  PAM_SECURETTY(8)

NAME

       pam_securetty - Limit root login to special devices

SYNOPSIS

       pam_securetty.so [debug]

DESCRIPTION

       pam_securetty is a PAM module that allows root logins only if the user is logging in on a "secure" tty, as defined by the listing in
       /etc/securetty. pam_securetty also checks to make sure that /etc/securetty is a plain file and not world writable. It will also allow root
       logins on the tty specified with console= switch on the kernel command line and on ttys from the /sys/class/tty/console/active.

       This module has no effect on non-root users and requires that the application fills in the PAM_TTY item correctly.

       For canonical usage, should be listed as a required authentication method before any sufficient authentication methods.

OPTIONS

       debug
	   Print debug information.

       noconsole
	   Do not automatically allow root logins on the kernel console device, as specified on the kernel command line or by the sys file, if it
	   is not also specified in the /etc/securetty file.

MODULE TYPES PROVIDED

       Only the auth module type is provided.

RETURN VALUES

       PAM_SUCCESS
	   The user is allowed to continue authentication. Either the user is not root, or the root user is trying to log in on an acceptable
	   device.

       PAM_AUTH_ERR
	   Authentication is rejected. Either root is attempting to log in via an unacceptable device, or the /etc/securetty file is world
	   writable or not a normal file.

       PAM_INCOMPLETE
	   An application error occurred. pam_securetty was not able to get information it required from the application that called it.

       PAM_SERVICE_ERR
	   An error occurred while the module was determining the user's name or tty, or the module could not open /etc/securetty.

       PAM_USER_UNKNOWN
	   The module could not find the user name in the /etc/passwd file to verify whether the user had a UID of 0. Therefore, the results of
	   running this module are ignored.

EXAMPLES

	   auth  required  pam_securetty.so
	   auth  required  pam_unix.so

SEE ALSO

       securetty(5), pam.conf(5), pam.d(5), pam(7)

AUTHOR

       pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.

Linux-PAM Manual						    09/19/2013							  PAM_SECURETTY(8)

Linux