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 <email@example.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 2020-08-13. 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 firstname.lastname@example.org Linux-PAM Manual 04/01/2016 PAM_NOLOGIN(8)
Pages that refer to this page: nologin(8), systemd-user-sessions(8), systemd-user-sessions.service(8)