[svn-upgrade] Integrating new upstream version, shadow (4.0.9)
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nekral-guest
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man/usermod.8.xml
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man/usermod.8.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
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<refentry id='usermod.8'>
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<!-- $Id: usermod.8.xml,v 1.5 2005/04/28 13:57:45 kloczek Exp $ -->
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<refmeta>
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<refentrytitle>usermod</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv id='name'>
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<refname>usermod</refname>
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<refpurpose>Modify a user account</refpurpose>
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</refnamediv>
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<refsynopsisdiv id='synopsis'>
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<cmdsynopsis>
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<command>usermod</command>
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<arg choice='opt'>-c <replaceable>comment</replaceable></arg>
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<arg choice='opt'>
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<arg choice='plain'>-d <replaceable>home_dir</replaceable></arg>
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<arg choice='opt'>-m </arg>
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</arg>
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<arg choice='opt'>-e <replaceable>expire_date</replaceable></arg>
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<arg choice='opt'>-f <replaceable>inactive_time</replaceable></arg>
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<arg choice='opt'>-g <replaceable>initial_group</replaceable></arg>
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<sbr/>
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<arg choice='opt'>
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<arg choice='plain'>-G <replaceable>group1</replaceable></arg>
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<arg choice='opt'>
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<arg choice='plain' rep='repeat'><replaceable>,group2,</replaceable></arg>
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<arg choice='plain'><replaceable>,</replaceable></arg>
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<arg choice='opt'><replaceable>groupN</replaceable></arg>
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</arg>
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</arg>
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<sbr/>
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<arg choice='opt'>-l <replaceable>login_name</replaceable></arg>
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<arg choice='opt'>-p <replaceable>passwd</replaceable></arg>
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<arg choice='opt'>-s <replaceable>shell</replaceable></arg>
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<arg choice='opt'>
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<arg choice='plain'>-u <replaceable>uid</replaceable></arg>
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<arg choice='opt'>-o </arg>
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</arg>
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<sbr/>
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<group choice='opt'>
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<arg choice='plain'>-L </arg><arg choice='plain'>-U </arg>
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</group>
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<arg choice='plain'><replaceable>login</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para>
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The <command>usermod</command> command modifies the system account
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files to reflect the changes that are specified on the command line.
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</para>
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</refsect1>
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<refsect1 id='options'>
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<title>OPTIONS</title>
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<para>
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The options which apply to the <command>usermod</command> command
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are:
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</para>
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<variablelist remap='IP'>
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<varlistentry>
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<term>
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<option>-c</option> <replaceable>comment</replaceable>
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</term>
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<listitem>
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<para>The new value of the user's password file comment
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field. It is normally modified using the <citerefentry>
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<refentrytitle>chfn</refentrytitle><manvolnum>1</manvolnum>
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</citerefentry>utility.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-d</option> <replaceable>home_dir</replaceable>
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</term>
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<listitem>
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<para>
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The user's new login directory. If the <option>-m</option>
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option is given the contents of the current home directory will
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be moved to the new home directory, which is created if it does
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not already exist.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-e</option> <replaceable>expire_date</replaceable>
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</term>
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<listitem>
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<para>The date on which the user account will be disabled. The
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date is specified in the format <emphasis remap='I'>YYYY-MM-DD
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</emphasis>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-f</option> <replaceable>inactive_days</replaceable>
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</term>
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<listitem>
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<para>The number of days after a password expires until the
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account is permanently disabled. A value of 0 disables the
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account as soon as the password has expired, and a value of -1
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disables the feature. The default value is -1.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-g</option> <replaceable>initial_group</replaceable>
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</term>
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<listitem>
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<para>The group name or number of the user's new initial login
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group. The group name must exist. A group number must refer to
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an already existing group. The default group number is 1.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-G</option> <replaceable>group1</replaceable>[<emphasis remap='I'>
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,group2,...,
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</emphasis>
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[<emphasis remap='I'>groupN</emphasis>]]]
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</term>
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<listitem>
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<para>A list of supplementary groups which the user is also a
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member of. Each group is separated from the next by a comma,
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with no intervening whitespace. The groups are subject to the
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same restrictions as the group given with the
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<option>-g</option> option. If the user is currently a member of
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a group which is not listed, the user will be removed from the
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group.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-l</option> <replaceable>login_name</replaceable>
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</term>
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<listitem>
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<para>
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The name of the user will be changed from <emphasis
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remap='I'>login </emphasis> to <emphasis
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remap='I'>login_name</emphasis>. Nothing else is changed. In
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particular, the user's home directory name should probably be
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changed to reflect the new login name.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-L</option>
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</term>
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<listitem>
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<para>Lock a user's password. This puts a '!' in front of the
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encrypted password, effectively disabling the password. You
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can't use this option with <option>-p</option> or
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<option>-U</option>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-o</option>
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</term>
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<listitem>
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<para>
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When used with the <option>-u</option> option, this option
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allows to change the user ID to a non-unique value.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-p</option> <replaceable>passwd</replaceable>
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</term>
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<listitem>
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<para>
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The encrypted password, as returned by <citerefentry>
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<refentrytitle>crypt</refentrytitle><manvolnum>3</manvolnum>
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</citerefentry>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-s</option> <replaceable>shell</replaceable>
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</term>
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<listitem>
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<para>The name of the user's new login shell. Setting this field
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to blank causes the system to select the default login shell.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-u</option> <replaceable>uid</replaceable>
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</term>
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<listitem>
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<para>The numerical value of the user's ID. This value must be
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unique, unless the <option>-o</option> option is used. The value
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must be non-negative. Values between 0 and 99 are typically
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reserved for system accounts. Any files which the user owns and
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which are located in the directory tree rooted at the user's
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home directory will have the file user ID changed automatically.
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Files outside of the user's home directory must be altered
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manually.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-U</option>
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</term>
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<listitem>
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<para>Unlock a user's password. This removes the '!' in front of
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the encrypted password. You can't use this option with
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<option>-p</option> or <option>-L</option>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id='caveats'>
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<title>CAVEATS</title>
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<para>
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<command>usermod</command> will not allow you to change the name of a
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user who is logged in. You must make certain that the named user is
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not executing any processes when this command is being executed if the
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user's numerical user ID is being changed. You must change the owner
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of any crontab files manually. You must change the owner of any at
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jobs manually. You must make any changes involving NIS on the NIS
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server.
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</para>
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</refsect1>
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<refsect1 id='files'>
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<title>FILES</title>
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<variablelist>
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<varlistentry>
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<term><filename>/etc/passwd</filename></term>
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<listitem>user account information</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>/etc/shadow</filename></term>
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<listitem>secure user account information</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>/etc/group</filename></term>
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<listitem>group account information</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id='see_also'>
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<title>SEE ALSO</title>
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<para>
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<citerefentry>
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<refentrytitle>chfn</refentrytitle><manvolnum>1</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>chsh</refentrytitle><manvolnum>1</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>passwd</refentrytitle><manvolnum>1</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>crypt</refentrytitle><manvolnum>3</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>groupadd</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>groupdel</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>groupmod</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>useradd</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>userdel</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>.
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</para>
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</refsect1>
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<refsect1 id='author'>
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<title>AUTHOR</title>
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<para>Julianne Frances Haugh (jockgrrl@ix.netcom.com)</para>
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</refsect1>
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</refentry>
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