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Merge pull request #24084 from pothos/mask-sysext-docs

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man: Sysext docs improvements
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Luca Boccassi 2022-07-22 20:02:07 +01:00 committed by GitHub
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man/systemd-sysext.xml
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@ -64,7 +64,7 @@
<para>System extensions are supposed to be purely additive, i.e. they are supposed to include only files
that do not exist in the underlying basic OS image. However, the underlying mechanism (overlayfs) also
allows removing files, but it is recommended not to make use of this.</para>
allows overlaying or removing files, but it is recommended not to make use of this.</para>
<para>System extension images may be provided in the following formats:</para>
@ -108,7 +108,9 @@
accessed.</para>
<para>Note that there is no concept of enabling/disabling installed system extension images: all
installed extension images are automatically activated at boot.</para>
installed extension images are automatically activated at boot. However, you can place a symlink
to <filename>/dev/null</filename> in <filename>/etc/extensions/</filename> to "mask" an image with
the same name in a folder with lower precedence.</para>
<para>A simple mechanism for version compatibility is enforced: a system extension image must carry a
<filename>/usr/lib/extension-release.d/extension-release.<replaceable>$name</replaceable></filename>