test-execute: Add tests for new PassEnvironment= directive

[thirdparty/systemd.git] / man / systemd-networkd.service.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">

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<refentry id="systemd-networkd.service" conditional='ENABLE_NETWORKD'>

  <refentryinfo>
    <title>systemd-networkd.service</title>
    <productname>systemd</productname>

    <authorgroup>
      <author>
        <contrib>Developer</contrib>
        <firstname>Tom</firstname>
        <surname>Gundersen</surname>
        <email>teg@jklm.no</email>
      </author>
    </authorgroup>
  </refentryinfo>

  <refmeta>
    <refentrytitle>systemd-networkd.service</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>systemd-networkd.service</refname>
    <refname>systemd-networkd</refname>
    <refpurpose>Network manager</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <para><filename>systemd-networkd.service</filename></para>
    <para><filename>/usr/lib/systemd/systemd-networkd</filename></para>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><command>systemd-networkd</command> is a system service that
    manages networks. It detects and configures network devices as
    they appear, as well as creating virtual network devices.</para>

    <para>To configure low-level link settings independently of
    networks, see
    <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>

    <para>Network configurations applied before networkd is started
    are not removed, and static configuration applied by networkd is
    not removed when networkd exits. Dynamic configuration applied by
    networkd may also optionally be left in place on shutdown. This
    ensures restarting networkd does not cut the network connection,
    and, in particular, that it is safe to transition between the
    initrd and the real root, and back.</para>
  </refsect1>

  <refsect1><title>Configuration Files</title>
    <para>The configuration files are read from the files located in the
    system network directory <filename>/usr/lib/systemd/network</filename>,
    the volatile runtime network directory
    <filename>/run/systemd/network</filename> and the local administration
    network directory <filename>/etc/systemd/network</filename>.</para>

    <para>Networks are configured in <filename>.network</filename>
    files, see
    <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
    and virtual network devices are configured in
    <filename>.netdev</filename> files, see
    <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
    </para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
    </para>
  </refsect1>

</refentry>