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man: document nss-resolve
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Lennart Poettering
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0d6868f9ae
@ -1774,13 +1774,19 @@ endif
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if ENABLE_RESOLVED
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MANPAGES += \
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man/nss-resolve.8 \
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man/resolved.conf.5 \
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man/systemd-resolved.service.8
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MANPAGES_ALIAS += \
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man/libnss_resolve.so.2.8 \
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man/resolved.conf.d.5 \
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man/systemd-resolved.8
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man/libnss_resolve.so.2.8: man/nss-resolve.8
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man/resolved.conf.d.5: man/resolved.conf.5
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man/systemd-resolved.8: man/systemd-resolved.service.8
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man/libnss_resolve.so.2.html: man/nss-resolve.html
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$(html-alias)
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man/resolved.conf.d.html: man/resolved.conf.html
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$(html-alias)
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@ -2217,6 +2223,7 @@ EXTRA_DIST += \
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man/networkctl.xml \
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man/nss-myhostname.xml \
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man/nss-mymachines.xml \
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man/nss-resolve.xml \
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man/os-release.xml \
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man/pam_systemd.xml \
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man/resolved.conf.xml \
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@ -111,17 +111,17 @@
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<para>Here's an example <filename>/etc/nsswitch.conf</filename>
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file, that enables <command>myhostname</command> correctly:</para>
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<programlisting>passwd: compat
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group: compat
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shadow: compat
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<programlisting>passwd: compat
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group: compat
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shadow: compat
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hosts: files dns mymachines <command>myhostname</command>
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hosts: files resolve mymachines <command>myhostname</command>
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networks: files
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protocols: db files
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services: db files
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ethers: db files
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rpc: db files
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ethers: db files
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rpc: db files
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netgroup: nis</programlisting>
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@ -143,6 +143,7 @@ netgroup: nis</programlisting>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-mymachines</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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@ -91,7 +91,7 @@
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group: compat <command>mymachines</command>
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shadow: compat
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hosts: files dns <command>mymachines</command> myhostname
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hosts: files resolve <command>mymachines</command> myhostname
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networks: files
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protocols: db files
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@ -108,6 +108,7 @@ netgroup: nis</programlisting>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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118
man/nss-resolve.xml
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118
man/nss-resolve.xml
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@ -0,0 +1,118 @@
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<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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Copyright 2013 Tom Gundersen
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="nss-resolve" conditional='ENABLE_RESOLVED'>
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<refentryinfo>
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<title>nss-resolve</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>nss-resolve</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>nss-resolve</refname>
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<refname>libnss_resolve.so.2</refname>
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<refpurpose>Provide hostname resolution via <filename>systemd-resolved.service</filename></refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>libnss_resolve.so.2</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>nss-resolve</command> is a plugin module for the
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GNU Name Service Switch (NSS) functionality of the GNU C Library
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(<command>glibc</command>) enabling it to resolve host names via
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the
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<citerefentry><refentrytitle>systemd-resolved</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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local network name resolution service.</para>
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<para>To activate the NSS module, <literal>resolve</literal>
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has to be added to the line starting with
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<literal>hosts:</literal> in
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<filename>/etc/nsswitch.conf</filename>.</para>
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<para>It is recommended to place <literal>resolve</literal> early
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in the <filename>nsswitch.conf</filename> line (but after the
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<literal>files</literal> entry), replacing the
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<literal>dns</literal> entry if it exists, to ensure DNS queries
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are always routed via
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<citerefentry><refentrytitle>systemd-resolved</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<para>Here's an example <filename>/etc/nsswitch.conf</filename>
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file, that enables <command>resolve</command> correctly:</para>
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<programlisting>passwd: compat
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group: compat
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shadow: compat
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hosts: files <command>resolve</command> mymachines myhostname
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networks: files
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protocols: db files
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services: db files
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ethers: db files
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rpc: db files
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netgroup: nis</programlisting>
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<para>Note that <command>nss-resolve</command> will chain-load
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<command>nss-dns</command> if
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<filename>systemd-resolved.service</filename> is not running,
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ensuring that basic DNS resolution continues to work if the
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service is down.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-resolved</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-mymachines</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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