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Section (5) nologin

Linux manual pages Section 5  

Name

nologin — prevent unprivileged users from logging into the system

DESCRIPTION

If the file /etc/nologin exists and is readable, login(1) will allow access only to root. Other users will be shown the contents of this file and their logins will be refused. This provides a simple way of temporarily disabling all unprivileged logins.

FILES

/etc/nologin

SEE ALSO

login(1), shutdown(8)

COLOPHON

This page is part of release 4.16 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.


  Copyright (c) 1993 Michael Haardt (michaelmoria.de),
    Fri Apr  2 11:32:09 MET DST 1993

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Modified Sun Jul 25 11:06:34 1993 by Rik Faith (faithcs.unc.edu)
Corrected Mon Oct 21 17:47:19 EDT 1996 by Eric S. Raymond (esrthyrsus.com)

Section (8) nologin

Linux manual pages Section 8  

Name

nologin — politely refuse a login

Synopsis

nologin [−V] [−h]

DESCRIPTION

nologin displays a message that an account is not available and exits non-zero. It is intended as a replacement shell field to deny login access to an account.

If the file /etc/nologin.txt exists, nologin displays its contents to the user instead of the default message.

The exit code returned by nologin is always 1.

OPTIONS

−h, −−help

Display help text and exit.

−V, −−version

Display version information and exit.

NOTES

nologin is a per-account way to disable login (usually used for system accounts like http or ftp). nologin(8) uses /etc/nologin.txt as an optional source for a non-default message, the login access is always refused independently of the file.

pam_nologin(8) PAM module usually prevents all non-root users from logging into the system. pam_nologin(8) functionality is controlled by /var/run/nologin or the /etc/nologin file.

AUTHORS

Karel Zak

SEE ALSO

login(1), passwd(5), pam_nologin(8)

HISTORY

The nologin command appeared in 4.4BSD.

AVAILABILITY

The nologin command is part of the util-linux package and is available from Linux Kernel Archive