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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | EXAMPLES | NOTES | SEE ALSO | AUTHOR | COLOPHON |
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PAM_NOLOGIN(8) Linux-PAM Manual PAM_NOLOGIN(8)
pam_nologin - Prevent non-root users from login
pam_nologin.so [file=/path/nologin] [successok]
pam_nologin is a PAM module that prevents users from logging into the
system when /var/run/nologin or /etc/nologin exists. The contents of
the file are displayed to the user. The pam_nologin module has no
effect on the root user's ability to log in.
file=/path/nologin
Use this file instead the default /var/run/nologin or
/etc/nologin.
successok
Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE.
The auth and acct module types are provided.
PAM_AUTH_ERR
The user is not root and /etc/nologin exists, so the user is not
permitted to log in.
PAM_BUF_ERR
Memory buffer error.
PAM_IGNORE
This is the default return value.
PAM_SUCCESS
Success: either the user is root or the nologin file does not
exist.
PAM_USER_UNKNOWN
User not known to the underlying authentication module.
The suggested usage for /etc/pam.d/login is:
auth required pam_nologin.so
In order to make this module effective, all login methods should be
secured by it. It should be used as a required method listed before
any sufficient methods in order to get standard Unix nologin
semantics. Note, the use of successok module argument causes the
module to return PAM_SUCCESS and as such would break such a
configuration - failing sufficient modules would lead to a successful
login because the nologin module succeeded.
nologin(5), pam.conf(5), pam.d(5), pam(8)
pam_nologin was written by Michael K. Johnson <johnsonm@redhat.com>.
This page is part of the linux-pam (Pluggable Authentication Modules
for Linux) project. Information about the project can be found at
⟨http://www.linux-pam.org/⟩. If you have a bug report for this manual
page, see ⟨//www.linux-pam.org/⟩. This page was obtained from the
tarball Linux-PAM-1.3.0.tar.bz2 fetched from
⟨http://www.linux-pam.org/library/⟩ on 2018-02-02. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Linux-PAM Manual 04/01/2016 PAM_NOLOGIN(8)
Pages that refer to this page: nologin(8), systemd-user-sessions.service(8)
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