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-'\" t
-.\" Title: sulogin
-.\" Author: Julianne Frances Haugh
-.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
-.\" Date: 05/25/2012
-.\" Manual: System Management Commands
-.\" Source: shadow-utils 4.1.5.1
-.\" Language: English
-.\"
-.TH "SULOGIN" "8" "05/25/2012" "shadow\-utils 4\&.1\&.5\&.1" "System Management Commands"
-.\" -----------------------------------------------------------------
-.\" * Define some portability stuff
-.\" -----------------------------------------------------------------
-.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.\" http://bugs.debian.org/507673
-.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
-.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.ie \n(.g .ds Aq \(aq
-.el .ds Aq '
-.\" -----------------------------------------------------------------
-.\" * set default formatting
-.\" -----------------------------------------------------------------
-.\" disable hyphenation
-.nh
-.\" disable justification (adjust text to left margin only)
-.ad l
-.\" -----------------------------------------------------------------
-.\" * MAIN CONTENT STARTS HERE *
-.\" -----------------------------------------------------------------
-.SH "NAME"
-sulogin \- Single\-user login
-.SH "SYNTAX"
-.PP
-\fBsulogin\fR
-[\fItty\-device\fR]
-.SH "DESCRIPTION"
-.PP
-The
-\fBsulogin\fR
-command is invoked by
-\fBinit\fR
-prior to allowing the user access to the system when in single user mode\&. This feature may only be available on certain systems where
-\fBinit\fR
-has been modified accordingly, or where the
-/etc/inittab
-has an entry for a single user login\&.
-.PP
-The user is prompted
-.PP
-Type control\-d to proceed with normal startup,
-(or give root password for system maintenance):
-.PP
-Input and output will be performed with the standard file descriptors unless the optional device name argument is provided\&.
-.PP
-If the user enters the correct root password, a login session is initiated\&. When
-\fIEOF\fR
-is pressed instead, the system enters multi\-user mode\&.
-.PP
-After the user exits the single\-user shell, or presses
-\fIEOF\fR, the system begins the initialization process required to enter multi\-user mode\&.
-.SH "CAVEATS"
-.PP
-This command can only be used if
-\fBinit\fR
-has been modified to call
-\fBsulogin\fR
-instead of
-/bin/sh, or if the user has set the
-\fIinittab\fR
-to support a single user login\&. For example, the line:
-.PP
-co:s:respawn:/etc/sulogin /dev/console
-.PP
-should execute the sulogin command in single user mode\&.
-.PP
-As complete an environment as possible is created\&. However, various devices may be unmounted or uninitialized and many of the user commands may be unavailable or nonfunctional as a result\&.
-.SH "CONFIGURATION"
-.PP
-The following configuration variables in
-/etc/login\&.defs
-change the behavior of this tool:
-.PP
-\fBENV_HZ\fR (string)
-.RS 4
-If set, it will be used to define the HZ environment variable when a user login\&. The value must be preceded by
-\fIHZ=\fR\&. A common value on Linux is
-\fIHZ=100\fR\&.
-.RE
-.PP
-\fBENV_TZ\fR (string)
-.RS 4
-If set, it will be used to define the TZ environment variable when a user login\&. The value can be the name of a timezone preceded by
-\fITZ=\fR
-(for example
-\fITZ=CST6CDT\fR), or the full path to the file containing the timezone specification (for example
-/etc/tzname)\&.
-.sp
-If a full path is specified but the file does not exist or cannot be read, the default is to use
-\fITZ=CST6CDT\fR\&.
-.RE
-.SH "FILES"
-.PP
-/etc/passwd
-.RS 4
-User account information\&.
-.RE
-.PP
-/etc/shadow
-.RS 4
-Secure user account information\&.
-.RE
-.SH "SEE ALSO"
-.PP
-
-\fBlogin\fR(1),
-\fBsh\fR(1),
-\fBinit\fR(8)\&.