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securetty(5) [debian man page]

SECURETTY(5)						     Linux Programmer's Manual						      SECURETTY(5)

securetty - file which lists ttys from which root can log in DESCRIPTION
The file /etc/securetty is used by (some versions of) login(1). The file contains the device names of tty lines (one per line, without leading /dev/) on which root is allowed to login. See login.defs(5) if you use the shadow suite. FILES
/etc/securetty SEE ALSO
login(1), login.defs(5) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at Linux 1992-12-29 SECURETTY(5)

Check Out this Related Man Page

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

pam_securetty - Limit root login to special devices SYNOPSIS [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 auth required SEE ALSO
securetty(5), pam.conf(5), pam.d(5), pam(8) AUTHOR
pam_securetty was written by Elliot Lee <>. Linux-PAM Manual 09/19/2013 PAM_SECURETTY(8)

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