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-.\" Title: pam_nologin
-.\" Author:
-.\" Generator: DocBook XSL Stylesheets v1.73.1 <http://docbook.sf.net/>
-.\" Date: 01/08/2008
-.\" Manual: Linux-PAM Manual
-.\" Source: Linux-PAM Manual
-.\"
-.TH "PAM_NOLOGIN" "8" "01/08/2008" "Linux-PAM Manual" "Linux\-PAM Manual"
-.\" disable hyphenation
-.nh
-.\" disable justification (adjust text to left margin only)
-.ad l
-.SH "NAME"
-pam_nologin - Prevent non-root users from login
-.SH "SYNOPSIS"
-.HP 15
-\fBpam_nologin\.so\fR [file=\fI/path/nologin\fR] [successok]
-.SH "DESCRIPTION"
-.PP
-pam_nologin is a PAM module that prevents users from logging into the system when
-\fI/etc/nologin\fR
-exists\. The contents of the
-\fI/etc/nologin\fR
-file are displayed to the user\. The pam_nologin module has no effect on the root user\'s ability to log in\.
-.SH "OPTIONS"
-.PP
-\fBfile=\fR\fB\fI/path/nologin\fR\fR
-.RS 4
-Use this file instead the default
-\fI/etc/nologin\fR\.
-.RE
-.PP
-\fBsuccessok\fR
-.RS 4
-Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE\.
-.RE
-.SH "MODULE SERVICES PROVIDED"
-.PP
-The
-\fBauth\fR
-and
-\fBacct\fR
-services are supported\.
-.SH "RETURN VALUES"
-.PP
-PAM_AUTH_ERR
-.RS 4
-The user is not root and
-\fI/etc/nologin\fR
-exists, so the user is not permitted to log in\.
-.RE
-.PP
-PAM_BUF_ERR
-.RS 4
-Memory buffer error\.
-.RE
-.PP
-PAM_IGNORE
-.RS 4
-This is the default return value\.
-.RE
-.PP
-PAM_SUCCESS
-.RS 4
-Success: either the user is root or the
-\fI/etc/nologin\fR
-file does not exist\.
-.RE
-.PP
-PAM_USER_UNKNOWN
-.RS 4
-User not known to the underlying authentication module\.
-.RE
-.SH "EXAMPLES"
-.PP
-The suggested usage for
-\fI/etc/pam\.d/login\fR
-is:
-.sp
-.RS 4
-.nf
-auth required pam_nologin\.so
-
-.fi
-.RE
-.sp
-.SH "NOTES"
-.PP
-In order to make this module effective, all login methods should be secured by it\. It should be used as a
-\fIrequired\fR
-method listed before any
-\fIsufficient\fR
-methods in order to get standard Unix nologin semantics\. Note, the use of
-\fBsuccessok\fR
-module argument causes the module to return
-\fIPAM_SUCCESS\fR
-and as such would break such a configuration \- failing
-\fIsufficient\fR
-modules would lead to a successful login because the nologin module
-\fIsucceeded\fR\.
-.SH "SEE ALSO"
-.PP
-
-\fBnologin\fR(5),
-\fBpam.conf\fR(5),
-\fBpam.d\fR(8),
-\fBpam\fR(8)
-.SH "AUTHOR"
-.PP
-pam_nologin was written by Michael K\. Johnson <johnsonm@redhat\.com>\.