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man: make chroot less prominent in discussion of nspawn
Not as many people use chroot as before, so make the flow a bit nicer by talking less about chroot. "change to the either" is awkward and unclear. Just remove that part, because all changes are lost, period.
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@ -73,11 +73,9 @@
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since it fully virtualizes the file system hierarchy, as well as the process tree, the various IPC subsystems and
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the host and domain name.</para>
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<para>Like <citerefentry
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project='man-pages'><refentrytitle>chroot</refentrytitle><manvolnum>1</manvolnum></citerefentry> the
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<command>systemd-nspawn</command> command may be invoked on any directory tree containing an operating system tree,
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<para><command>systemd-nspawn</command> may be invoked on any directory tree containing an operating system tree,
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using the <option>--directory=</option> command line option. By using the <option>--machine=</option> option an OS
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tree is automatically searched in a couple of locations, most importantly in
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tree is automatically searched for in a couple of locations, most importantly in
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<filename>/var/lib/machines</filename>, the suggested directory to place container images installed on the
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system.</para>
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@ -935,8 +933,8 @@
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<literal>tmpfs</literal> instance, and
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<filename>/usr</filename> from the OS tree is mounted into it
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in read-only mode (the system thus starts up with read-only OS
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resources, but pristine state and configuration, any changes
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to the either are lost on shutdown). When the mode parameter
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image, but pristine state and configuration, any changes
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are lost on shutdown). When the mode parameter
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is specified as <option>state</option>, the OS tree is
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mounted read-only, but <filename>/var</filename> is mounted as
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a <literal>tmpfs</literal> instance into it (the system thus
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