nixos/manual: document use of systemd to mount filesystems (#87684)

* nixos/manual: document use of systemd to mount filesystems
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Ethan Glasser-Camp 2020-05-14 12:00:01 -04:00 committed by GitHub
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@ -16,6 +16,17 @@
fsType = "ext4";
};
</programlisting>
This will create an entry in <filename>/etc/fstab</filename>, which will
generate a corresponding
<link xlink:href="https://www.freedesktop.org/software/systemd/man/systemd.mount.html">systemd.mount</link>
unit via
<link xlink:href="https://www.freedesktop.org/software/systemd/man/systemd-fstab-generator.html">systemd-fstab-generator</link>.
The filesystem will be mounted automatically unless
<literal>"noauto"</literal> is present in <link
linkend="opt-fileSystems._name__.options">options</link>.
<literal>"noauto"</literal> filesystems can be mounted explicitly using
<command>systemctl</command> e.g. <command>systemctl start
data.mount</command>.
Mount points are created automatically if they dont already exist. For
<option><link linkend="opt-fileSystems._name__.device">device</link></option>,
its best to use the topology-independent device aliases in