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man: say $BOOT not /boot in kernel-install(8)

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Zbigniew Jędrzejewski-Szmek 2019-03-08 19:21:54 +01:00
parent cf73f65089
commit 694fe6daf5
1 changed files with 23 additions and 14 deletions
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37
man/kernel-install.xml
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@ -37,9 +37,9 @@
<refsect1>
<title>Description</title>
<para>
<command>kernel-install</command> is used to install and remove kernel and
initramfs images to and from <filename>/boot</filename>.
<para><command>kernel-install</command> is used to install and remove kernel and initramfs images to and
from the boot loader partition, referred to as <varname>$BOOT</varname> here. It will usually be one of
<filename>/boot</filename>, <filename>/efi</filename>, or <filename>/boot/efi</filename>, see below.
</para>
<para><command>kernel-install</command> will execute the files
@ -71,15 +71,15 @@
<filename>/usr/lib/kernel/install.d/*.install</filename> and
<filename>/etc/kernel/install.d/*.install</filename> with the following arguments:
<programlisting>add <replaceable>KERNEL-VERSION</replaceable> <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> <replaceable>KERNEL-IMAGE</replaceable> [<replaceable>INITRD-FILE</replaceable> ...]</programlisting>
<programlisting>add <replaceable>KERNEL-VERSION</replaceable> <filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> <replaceable>KERNEL-IMAGE</replaceable> [<replaceable>INITRD-FILE</replaceable> ...]</programlisting>
</para>
<para>Three default plugins execute the following operations in this case:</para>
<itemizedlist>
<listitem><para><filename>00-entry-directory.install</filename> creates the directory
<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
if <filename>/boot/<replaceable>MACHINE-ID</replaceable>/</filename> already exists.
<filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
if <filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/</filename> already exists.
</para></listitem>
<listitem><para><filename>50-depmod.install</filename> runs
@ -88,19 +88,19 @@
<listitem><para><filename>90-loaderentry.install</filename> copies <replaceable>KERNEL-IMAGE</replaceable>
to
<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/linux</filename>.
<filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/linux</filename>.
If an <replaceable>INITRD-FILE</replaceable> is provided, it also copies <replaceable>INITRD-FILE</replaceable>
to
<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL_VERSION</replaceable>/<replaceable>INITRD-FILE</replaceable></filename>.
<filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL_VERSION</replaceable>/<replaceable>INITRD-FILE</replaceable></filename>.
It also creates a boot loader entry according to the <ulink
url="https://systemd.io/BOOT_LOADER_SPECIFICATION">Boot Loader Specification</ulink> in
<filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.
<filename>$BOOT/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.
The title of the entry is the <replaceable>PRETTY_NAME</replaceable> parameter specified in
<filename>/etc/os-release</filename> or <filename>/usr/lib/os-release</filename> (if the former is
missing), or "Linux <replaceable>KERNEL-VERSION</replaceable>", if unset.</para>
<para>If the entry directory
<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
<filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
does not exist, this plugin does nothing.</para></listitem>
</itemizedlist>
</listitem>
@ -112,11 +112,11 @@
<filename>/usr/lib/kernel/install.d/*.install</filename> and
<filename>/etc/kernel/install.d/*.install</filename> with the following arguments:
<programlisting>remove <replaceable>KERNEL-VERSION</replaceable> <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
<programlisting>remove <replaceable>KERNEL-VERSION</replaceable> <filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
</para>
<para>Afterwards, <command>kernel-install</command> removes the directory
<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
<filename>$BOOT/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
and its contents.</para>
<para>Two default plugins execute the following operations in this case:</para>
@ -126,14 +126,23 @@
<listitem><para><filename>50-depmod.install</filename> removes the files generated by <command>depmod</command> for this kernel again.</para></listitem>
<listitem><para><filename>90-loaderentry.install</filename> removes the file
<filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.</para></listitem>
<filename>$BOOT/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.</para></listitem>
</itemizedlist>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>The <varname>$BOOT</varname> partition</title>
<para>The partition where the kernels and <ulink url="https://systemd.io/BOOT_LOADER_SPECIFICATION">Boot
Loader Specification</ulink> snippets are located is called <varname>$BOOT</varname>.
<command>kernel-install</command> determines the location of this partition by checking
<filename>/efi/</filename>, <filename>/boot/</filename>, and <filename>/boot/efi</filename>
in turn. The first location where <filename>$BOOT/loader/entries/</filename> or
<filename>$BOOT/$MACHINE_ID/</filename> exists is used.</para>
</refsect1>
<refsect1>
@ -194,7 +203,7 @@
<listitem>
<para>Read by <filename>90-loaderentry.install</filename>. If this file exists a numeric value is read from
it and the naming of the generated entry file is slightly altered to include it as
<filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>+<replaceable>TRIES</replaceable>.conf</filename>. This
<filename>$BOOT/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>+<replaceable>TRIES</replaceable>.conf</filename>. This
is useful for boot loaders such as
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry> which
implement boot attempt counting with a counter embedded in the entry file name.</para>