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man: mention network-online.target in discussion of rc.local

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Replacement for #18853.
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Zbigniew Jędrzejewski-Szmek 2021-03-12 09:04:30 +01:00
parent 45b218b058
commit eb0845dfb8
1 changed files with 21 additions and 7 deletions
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28
man/systemd-rc-local-generator.xml
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@ -31,18 +31,32 @@
<refsect1>
<title>Description</title>
<para><filename>systemd-rc-local-generator</filename> is a generator that checks whether
<filename>&RC_LOCAL_PATH;</filename> exists and is executable, and if it is pulls the
<para><command>systemd-rc-local-generator</command> is a generator that checks whether
<filename>&RC_LOCAL_PATH;</filename> exists and is executable, and if it is, pulls the
<filename>rc-local.service</filename> unit into the boot process. This unit is responsible for running
this script during late boot. Note that the script will be run with slightly different semantics than the
original System V version, which was run "last" in the boot process, which is a concept that does not
translate to systemd. The script is run after <filename>network.target</filename>, but in parallel with
most other regular system services.</para>
this script during late boot. The script is run after <filename>network.target</filename>, but in
parallel with most other regular system services.</para>
<para>Note that <filename>rc-local.service</filename> runs with slightly different semantics than the
original System V version, which was executed "last" in the boot process, which is a concept that does
not translate to systemd.</para>
<para>Also note that <filename>rc-local.service</filename> is ordered after
<filename>network.target</filename>, which does not mean that the network is functional, see
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
If the script requires a configured network connection, it may be desirable to pull in and order it after
<filename>network-online.target</filename> with a drop-in:</para>
<programlisting># /etc/systemd/system/rc-local.service.d/network.conf
[Unit]
Wants=network-online.target
After=network-online.target
</programlisting>
<para>Support for <filename>&RC_LOCAL_PATH;</filename> is provided for compatibility with specific System
V systems only. However, it is strongly recommended to avoid making use of this script today, and instead
provide proper unit files with appropriate dependencies for any scripts to run during the boot process.
Note that the path to the script is set a compile time and varies between distributions.</para>
Note that the path to the script is set at compile time and varies between distributions.</para>
<para><filename>systemd-rc-local-generator</filename> implements
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>