shadow/man/sulogin.8.xml

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
<refentry id='sulogin.8'>
<!-- $Id: sulogin.8.xml,v 1.7 2005/06/15 12:39:27 kloczek Exp $ -->
<refmeta>
<refentrytitle>sulogin</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv id='name'>
<refname>sulogin</refname>
<refpurpose>Single-user login</refpurpose>
</refnamediv>
<refsect1 id='syntax'>
<title>SYNTAX</title>
<para>
<command>sulogin</command> [<emphasis remap='I'>
tty-device
</emphasis>
]
</para>
</refsect1>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
<command>sulogin</command> is invoked by <command>init</command> prior
to allowing the user access to the system when in single user mode.
This feature may only be available on certain systems where
<command>init</command> has been modified accordingly, or where the
<filename>/etc/inittab</filename> has an entry for a single user
login.
</para>
<para>The user is prompted</para>
<para>Type control-d to proceed with normal startup,
<!-- .br -->
(or give root password for system maintenance):
</para>
<para>Input and output will be performed with the standard file
descriptors unless
the optional device name argument is provided.
</para>
<para>If the user enters the correct root password, a login session is
initiated.
When <emphasis remap='B'>EOF</emphasis> is pressed instead, the
system enters multi-user mode.
</para>
<para>After the user exits the single-user shell, or presses <emphasis
remap='B'>EOF</emphasis>, the system begins the initialization process
required to enter multi-user mode.
</para>
</refsect1>
<refsect1 id='caveats'>
<title>CAVEATS</title>
<para>
This command can only be used if <command>init</command> has been
modified to call <command>sulogin</command> instead of
<filename>/bin/sh</filename>, or if the user has set the <emphasis
remap='I'>inittab</emphasis> to support a single user login. For
example, the line:
</para>
<!-- .br -->
<para>co:s:respawn:/etc/sulogin /dev/console</para>
<!-- .br -->
<para>should execute the sulogin command in single user mode.</para>
<para>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.
</para>
</refsect1>
<refsect1 id='files'>
<title>FILES</title>
<variablelist>
<varlistentry>
<term><filename>/etc/passwd</filename></term>
<listitem>user account information</listitem>
</varlistentry>
<varlistentry>
<term><filename>/etc/shadow</filename></term>
<listitem>secure user account information</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para><citerefentry>
<refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>init</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>
</para>
</refsect1>
<refsect1 id='author'>
<title>AUTHOR</title>
<para>Julianne Frances Haugh (jockgrrl@ix.netcom.com)</para>
</refsect1>
</refentry>