<?xml version="1.0" encoding="UTF-8"?> <!-- Copyright (c) 1990 , Julianne Frances Haugh Copyright (c) 2007 - 2011, Nicolas François All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the copyright holders or contributors may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ <!ENTITY CHSH_AUTH SYSTEM "login.defs.d/CHSH_AUTH.xml"> <!ENTITY LOGIN_STRING SYSTEM "login.defs.d/LOGIN_STRING.xml"> <!-- SHADOW-CONFIG-HERE --> ]> <refentry id='chsh.1'> <!-- $Id$ --> <refentryinfo> <author> <firstname>Julianne Frances</firstname> <surname>Haugh</surname> <contrib>Creation, 1990</contrib> </author> <author> <firstname>Thomas</firstname> <surname>Kłoczko</surname> <email>kloczek@pld.org.pl</email> <contrib>shadow-utils maintainer, 2000 - 2007</contrib> </author> <author> <firstname>Nicolas</firstname> <surname>François</surname> <email>nicolas.francois@centraliens.net</email> <contrib>shadow-utils maintainer, 2007 - now</contrib> </author> </refentryinfo> <refmeta> <refentrytitle>chsh</refentrytitle> <manvolnum>1</manvolnum> <refmiscinfo class="sectdesc">User Commands</refmiscinfo> <refmiscinfo class="source">shadow-utils</refmiscinfo> <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo> </refmeta> <refnamediv id='name'> <refname>chsh</refname> <refpurpose>change login shell</refpurpose> </refnamediv> <refsynopsisdiv id='synopsis'> <cmdsynopsis> <command>chsh</command> <arg choice='opt'> <replaceable>options</replaceable> </arg> <arg choice='opt'> <replaceable>LOGIN</replaceable> </arg> </cmdsynopsis> </refsynopsisdiv> <refsect1 id='description'> <title>DESCRIPTION</title> <para> The <command>chsh</command> command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change the login shell for her own account; the superuser may change the login shell for any account. </para> </refsect1> <refsect1 id='options'> <title>OPTIONS</title> <para> The options which apply to the <command>chsh</command> command are: </para> <variablelist remap='IP'> <varlistentry> <term><option>-h</option>, <option>--help</option></term> <listitem> <para>Display help message and exit.</para> </listitem> </varlistentry> <varlistentry> <term> <option>-R</option>, <option>--root</option> <replaceable>CHROOT_DIR</replaceable> </term> <listitem> <para> Apply changes in the <replaceable>CHROOT_DIR</replaceable> directory and use the configuration files from the <replaceable>CHROOT_DIR</replaceable> directory. </para> </listitem> </varlistentry> <varlistentry> <term> <option>-s</option>, <option>--shell</option> <replaceable>SHELL</replaceable> </term> <listitem> <para> The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell. </para> </listitem> </varlistentry> </variablelist> <para> If the <option>-s</option> option is not selected, <command>chsh</command> operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of <emphasis>[ ]</emphasis> marks. </para> </refsect1> <refsect1 id='note'> <title>NOTE</title> <para> The only restriction placed on the login shell is that the command name must be listed in <filename>/etc/shells</filename>, unless the invoker is the superuser, and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing <filename>/bin/rsh</filename> in <filename>/etc/shells</filename> is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell back to its original value. </para> </refsect1> <refsect1 id='configuration' condition="no_pam"> <title>CONFIGURATION</title> <para> The following configuration variables in <filename>/etc/login.defs</filename> change the behavior of this tool: </para> <variablelist> &CHSH_AUTH; &LOGIN_STRING; </variablelist> </refsect1> <refsect1 id='files'> <title>FILES</title> <variablelist> <varlistentry> <term><filename>/etc/passwd</filename></term> <listitem> <para>User account information.</para> </listitem> </varlistentry> <varlistentry> <term><filename>/etc/shells</filename></term> <listitem> <para>List of valid login shells.</para> </listitem> </varlistentry> <varlistentry> <term><filename>/etc/login.defs</filename></term> <listitem> <para>Shadow password suite configuration.</para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id='see_also'> <title>SEE ALSO</title> <para> <citerefentry> <refentrytitle>chfn</refentrytitle><manvolnum>1</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>passwd</refentrytitle><manvolnum>5</manvolnum> </citerefentry>. </para> </refsect1> </refentry>