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shadow/man/groupadd.8.xml
nekral-guest 6573e0175f * man/groupadd.8.xml, man/useradd.8.xml: names may also contain 
digits.
2009-05-18 22:43:59 +00:00

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<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 1991 , Julianne Frances Haugh
Copyright (c) 2007 - 2009, Nicolas François
All rights reserved.
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY GID_MAX SYSTEM "login.defs.d/GID_MAX.xml">
<!ENTITY MAX_MEMBERS_PER_GROUP SYSTEM "login.defs.d/MAX_MEMBERS_PER_GROUP.xml">
<!ENTITY SYS_GID_MAX SYSTEM "login.defs.d/SYS_GID_MAX.xml">
<!ENTITY % config SYSTEM "config.xml">
%config;
]>
<refentry id='groupadd.8'>
<!-- $Id$ -->
<refmeta>
<refentrytitle>groupadd</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>groupadd</refname>
<refpurpose>create a new group</refpurpose>
</refnamediv>
<!-- body begins here -->
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
<command>groupadd</command>
<arg choice='opt'>
<replaceable>options</replaceable>
<replaceable>group</replaceable>
</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>The <command>groupadd</command> command creates a new group
account using the values specified on the command line plus the default
values from the system. The new group will be entered into the system
files as needed.
</para>
</refsect1>
<refsect1 id='options'>
<title>OPTIONS</title>
<para>
The options which apply to the <command>groupadd</command> command
are:
</para>
<variablelist remap='IP'>
<varlistentry>
<term>
<option>-f</option>, <option>--force</option>
</term>
<listitem>
<para>
This option causes the command to simply exit with success
status if the specified group already exists. When used with
<option>-g</option>, and the specified GID already exists,
another (unique) GID is chosen (i.e. <option>-g</option> is
turned off).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-g</option>, <option>--gid</option> <replaceable>GID</replaceable>
</term>
<listitem>
<para>The numerical value of the group's ID. This value must be
unique, unless the <option>-o</option> option is used. The value
must be non-negative. The default is to use the smallest ID
value greater than 999 and greater than every other group.
Values between 0 and 999 are typically reserved for system
accounts.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-h</option>, <option>--help</option></term>
<listitem>
<para>Display help message and exit.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-K</option>, <option>--key</option> <replaceable>KEY</replaceable>=<replaceable>VALUE</replaceable>
</term>
<listitem>
<para>
Overrides <filename>/etc/login.defs</filename> defaults
(GID_MIN, GID_MAX and others). Multiple
<option>-K</option> options can be specified.
</para>
<para>
Example: <option>-K </option><replaceable>GID_MIN</replaceable>=<replaceable>100</replaceable>
<option> -K </option><replaceable>GID_MAX</replaceable>=<replaceable>499</replaceable>
</para>
<para>
Note: <option>-K </option>
<replaceable>GID_MIN</replaceable>=<replaceable>10</replaceable>,<replaceable>GID_MAX</replaceable>=<replaceable>499</replaceable>
doesn't work yet.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-o</option>, <option>--non-unique</option>
</term>
<listitem>
<para>
This option permits to add a group with a non-unique GID.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-p</option>, <option>--password</option>
<replaceable>PASSWORD</replaceable>
</term>
<listitem>
<para>
The encrypted password, as returned by <citerefentry>
<refentrytitle>crypt</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>. The default is to disable the password.
</para>
<para>
<emphasis role="bold">Note:</emphasis> This option is not
recommended because the password (or encrypted password) will
be visible by users listing the processes.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-r</option>, <option>--system</option>
</term>
<listitem>
<para>
Create a system group.
</para>
<para>
The numeric identifiers of new system groups are choosen in
the <option>SYS_GID_MIN</option>-<option>SYS_GID_MAX</option>
range, defined in <filename>login.defs</filename>, instead of
<option>GID_MIN</option>-<option>GID_MAX</option>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='configuration'>
<title>CONFIGURATION</title>
<para>
The following configuration variables in
<filename>/etc/login.defs</filename> change the behavior of this
tool:
</para>
<variablelist>
&GID_MAX; <!-- documents also GID_MIN -->
&MAX_MEMBERS_PER_GROUP;
&SYS_GID_MAX; <!-- documents also SYS_GID_MIN -->
</variablelist>
</refsect1>
<refsect1 id='files'>
<title>FILES</title>
<variablelist>
<varlistentry>
<term><filename>/etc/group</filename></term>
<listitem>
<para>Group account information.</para>
</listitem>
</varlistentry>
<varlistentry condition="gshadow">
<term><filename>/etc/gshadow</filename></term>
<listitem>
<para>Secure group account information.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><filename>/etc/login.defs</filename></term>
<listitem>
<para>Shadow password suite configuration.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='caveats'>
<title>CAVEATS</title>
<para>
Groupnames must start with a lower case letter or an underscore,
followed by lower case letters, digits, underscores, or dashes.
They can end with a dollar sign.
In regular expression terms: [a-z_][a-z0-9_-]*[$]?
</para>
<para>
Groupnames may only be up to &GROUP_NAME_MAX_LENGTH; characters long.
</para>
<para>
You may not add a NIS or LDAP group. This must be performed on the
corresponding server.
</para>
<para>
If the groupname already exists in an external group database such
as NIS or LDAP, <command>groupadd</command> will deny the group
creation request.
</para>
</refsect1>
<refsect1 id='exit_values'>
<title>EXIT VALUES</title>
<para>
The <command>groupadd</command> command exits with the following values:
<variablelist>
<varlistentry>
<term><replaceable>0</replaceable></term>
<listitem>
<para>success</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>2</replaceable></term>
<listitem>
<para>invalid command syntax</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>3</replaceable></term>
<listitem>
<para>invalid argument to option</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>4</replaceable></term>
<listitem>
<para>GID not unique (when <option>-o</option> not used)</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>9</replaceable></term>
<listitem>
<para>group name not unique</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>10</replaceable></term>
<listitem>
<para>can't update group file</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para><citerefentry>
<refentrytitle>chfn</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>chsh</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>passwd</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gpasswd</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>groupdel</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>groupmod</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>useradd</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>userdel</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>usermod</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>.
</para>
</refsect1>
</refentry>
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