mirror of
https://github.com/systemd/systemd.git
synced 2024-11-24 02:33:36 +08:00
114 lines
4.4 KiB
XML
114 lines
4.4 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
SPDX-License-Identifier: LGPL-2.1+
|
|
|
|
This file is part of systemd.
|
|
|
|
Copyright 2016 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
-->
|
|
|
|
<refentry id="nss-systemd" conditional='ENABLE_NSS_SYSTEMD'>
|
|
|
|
<refentryinfo>
|
|
<title>nss-systemd</title>
|
|
<productname>systemd</productname>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<contrib>Developer</contrib>
|
|
<firstname>Lennart</firstname>
|
|
<surname>Poettering</surname>
|
|
<email>lennart@poettering.net</email>
|
|
</author>
|
|
</authorgroup>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>nss-systemd</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>nss-systemd</refname>
|
|
<refname>libnss_systemd.so.2</refname>
|
|
<refpurpose>Provide UNIX user and group name resolution for dynamic users and groups.</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>libnss_systemd.so.2</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>nss-systemd</command> is a plug-in module for the GNU Name Service Switch (NSS) functionality of the
|
|
GNU C Library (<command>glibc</command>), providing UNIX user and group name resolution for dynamic users and
|
|
groups allocated through the <varname>DynamicUser=</varname> option in systemd unit files. See
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details on
|
|
this option.</para>
|
|
|
|
<para>This module also ensures that the root and nobody users and groups (i.e. the users/groups with the UIDs/GIDs
|
|
0 and 65534) remain resolvable at all times, even if they aren't listed in <filename>/etc/passwd</filename> or
|
|
<filename>/etc/group</filename>, or if these files are missing.</para>
|
|
|
|
<para>To activate the NSS module, add <literal>systemd</literal> to the lines starting with
|
|
<literal>passwd:</literal> and <literal>group:</literal> in <filename>/etc/nsswitch.conf</filename>.</para>
|
|
|
|
<para>It is recommended to place <literal>systemd</literal> after the <literal>files</literal> or
|
|
<literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines so that
|
|
<filename>/etc/passwd</filename> and <filename>/etc/group</filename> based mappings take precedence.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Example</title>
|
|
|
|
<para>Here is an example <filename>/etc/nsswitch.conf</filename> file that enables
|
|
<command>nss-systemd</command> correctly:</para>
|
|
|
|
<programlisting>passwd: compat mymachines <command>systemd</command>
|
|
group: compat mymachines <command>systemd</command>
|
|
shadow: compat
|
|
|
|
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname
|
|
networks: files
|
|
|
|
protocols: db files
|
|
services: db files
|
|
ethers: db files
|
|
rpc: db files
|
|
|
|
netgroup: nis</programlisting>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>nss-mymachines</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|