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mirror of https://github.com/systemd/systemd.git synced 2024-12-27 07:22:31 +03:00
systemd/man/kernel-install.xml
Zbigniew Jędrzejewski-Szmek 8b9f092112 man: fix issues reported by the manpage-l10n project
Fixes #25780.

> Man page: crypttab.5
> Issue 1:  Missing fullstop
> Issue 2:  I<cipher=>, I<hash=>, I<size=> → B<cipher=>, B<hash=>, B<size=>
>
> "Force LUKS mode\\&. When this mode is used, the following options are "
> "ignored since they are provided by the LUKS header on the device: "
> "I<cipher=>, I<hash=>, I<size=>"

Seems OK to me. The full stop is there and has been for at least a few years. And we use <option> for the markup, which is appropriate here.

> Man page: crypttab.5
> Issue 1:  Missing fullstop
> Issue 2:  I<cipher=>, I<hash=>, I<keyfile-offset=>, I<keyfile-size=>, I<size=> → B<cipher=>, B<hash=>, B<keyfile-offset=>, B<keyfile-size=>, B<size=>
>
> "Use TrueCrypt encryption mode\\&. When this mode is used, the following "
> "options are ignored since they are provided by the TrueCrypt header on the "
> "device or do not apply: I<cipher=>, I<hash=>, I<keyfile-offset=>, I<keyfile-"
> "size=>, I<size=>"

Same.

> Man page: journalctl.1
> Issue 1:  make be → may be

Fixed.

> Issue 2:  below\\&. → below:

Fixed.

> Man page: journalctl.1
> Issue:    Colon at the end?
>
> "The following commands are understood\\&. If none is specified the default "
> "is to display journal records\\&."
> msgstr ""
> "Die folgenden Befehle werden verstanden\\&. Falls keiner festgelegt ist, ist "
> "die Anzeige von Journal-Datensätzen die Vorgabe\\&."

This is a bit awkward, but I'm not sure how to fix it.

> Man page: kernel-install.8
> Issue:    methods a fallback → methods fallback

It was correct, but I added a comma to make the sense clearer.

> Man page: loader.conf.5
> Issue 1:  secure boot variables → Secure Boot variables
> Issue 2:  one → one for (multiple times)
>
> "Supported secure boot variables are one database for authorized images, one "
> "key exchange key (KEK) and one platform key (PK)\\&. For more information, "
> "refer to the \\m[blue]B<UEFI specification>\\m[]\\&\\s-2\\u[2]\\d\\s+2, "
> "under Secure Boot and Driver Signing\\&. Another resource that describe the "
> "interplay of the different variables is the \\m[blue]B<EDK2 "
> "documentation>\\m[]\\&\\s-2\\u[3]\\d\\s+2\\&."

"one of" would sound strange. "One this and one that" is OK.

> Man page: loader.conf.5
> Issue:    systemd-boot → B<systemd-boot>(7)

Fixed.

> Man page: logind.conf.5
> Issue:    systemd-logind → B<systemd-logind>(8)

We use <filename>systemd-logind</> on subsequent references… I think that's good enough.

> Man page: nss-myhostname.8
> Issue:    B<getent> → B<getent>(1)

Fixed.

> Man page: nss-resolve.8
> Issue:    B<systemd-resolved> → B<systemd-resolved>(8)

The first reference does this, subsequent are shorter.

> Man page: os-release.5
> Issue:    Portable Services → Portable Services Documentation?

Updated.

> Man page: pam_systemd_home.8
> Issue:    auth and account use "reason", while session and password do not?

Reworded.

> Man page: portablectl.1
> Issue:    In systemd-portabled.service(8): Portable Services Documentation

Updated.

> Man page: repart.d.5
> Issue:    The partition → the partition

Fixed.

> Man page: repart.d.5
> Issue:    B<systemd-repart> → B<systemd-repart>(8)

The first reference does this. I also change this one, because it's pretty far down in the text.

> Man page: systemd.1
> Issue:    kernel command line twice?
>
> "Takes a boolean argument\\&. If false disables importing credentials from "
> "the kernel command line, qemu_fw_cfg subsystem or the kernel command line\\&."

Apparently this was fixed already.

> Man page: systemd-boot.7
> Issue:    enrollement → enrollment

Fixed.

> Man page: systemd-cryptenroll.1
> Issue:    multiple cases: any specified → the specified

Reworded.

> Man page: systemd-cryptenroll.1
> Issue:    If this this → If this

Fixed tree-wide.

> Man page: systemd-cryptsetup-generator.8
> Issue:    and the initrd → and in the initrd

"Is honoured by the initrd" is OK, because we often speak about the initrd as a single unit. But in the same paragraph we also used "in the initrd", which makes the other use look sloppy. I changed it to "in the initrd" everywhere in that file.

> Man page: systemd.directives.7
> Issue:    Why are these two quoted (but not others)?
>
> "B<\\*(Aqh\\*(Aq>"
>
> B<\\*(Aqs\\*(Aq>"
>
> "B<\\*(Aqy\\*(Aq>"

This is autogenerated from files… We use slightly different markup in different files, and it's just too hard to make it consistent. We gave up on this.

> Man page: systemd.exec.5
> Issue 1:  B<at>(1p) → B<at>(1)
> Issue 2:  B<crontab>(1p) → B<crontab>(1)

Fixed.

> Man page: systemd.exec.5
> Issue:    B<select()> → B<select>(2)

Fixed.

> Man page: systemd.exec.5
> Issue:   qemu → B<qemu>(1)

The man page doesn't seem to be in any of the canonical places on the web.
I added a link to online docs.

> Man page: systemd.exec.5
> Issue:    variable → variables

Seems to be fixed already.

> Man page: systemd-integritysetup-generator.8
> Issue:    systemd-integritysetup-generator → B<systemd-integritysetup-generator>

I changed <filename> to <command>.

> Man page: systemd-integritysetup-generator.8
> Issue:    superfluous comma at the end

Already fixed.

> Man page: systemd-measure.1
> Issue:    (see B<--pcr-bank=>) below → (see B<--pcr-bank=> below)

Reworded.

> Man page: systemd-measure.1
> Issue:    =PATH> → =>I<PATH>

Fixed.

> Man page: systemd-measure.1.po
> Issue:    B<--bank=DIGEST> → B<--bank=>I<DIGEST>

Fixed.

> Man page: systemd.netdev.5
> Issue:    os the → on the

Appears to have been fixed already.

> Man page: systemd.netdev.5
> Issue:    Onboard → On-board (as in previous string)

Updated.

> Man page: systemd.network.5
> Issue:    B<systemd-networkd> -> B<systemd-networkd>(8)

First reference does this, subsequent do not.

> Man page: systemd.network.5
> Issue:    B<netlabelctl> → B<netlabelctl>(8)

First reference does this, subsequent do not.

> Man page: systemd.network.5
> Issue:    Missing verb (aquired? configured?) in the half sentence starting with "or by a "

I dropped the comma.

> Man page: systemd-nspawn.1
> Issue:    All host users outside of that range → All other host users

Reworded.

> # FIXME no effect → no effect\\&.
> #. type: Plain text
> #: archlinux debian-unstable fedora-rawhide mageia-cauldron opensuse-tumbleweed
> msgid ""
> "Whichever ID mapping option is used, the same mapping will be used for users "
> "and groups IDs\\&. If B<rootidmap> is used, the group owning the bind "
> "mounted directory will have no effect"

A period is added. Not sure if there's some other issue.

> Man page: systemd-oomd.service.8
> Issue:    B<systemd> → B<systemd>(1)

Done.

> Man page: systemd.path.5
> Issue 1:  B<systemd.exec>(1) → B<systemd.exec>(5)
> Issue 2:  This section does not (yet?) exist

Fixed.

> Man page: systemd-pcrphase.service.8
> Issue 1:  indicate phases into TPM2 PCR 11 ??
> Issue 2: Colon at the end of the paragraph?

Fixed.

> Man page: systemd-pcrphase.service.8
> Issue:    final boot phase → final shutdown phase?

Updated.

> Man page: systemd-pcrphase.service.8
> Issue:    for the the → for the

Fixed tree-wide.

> Man page: systemd-portabled.service.8
> Issue:    In systemd-portabled.service(8): Portable Services Documentation

Updated.

> Man page: systemd-pstore.service.8
> Issue:    Here and the following paragraphs: . → \\&. // Upstream: What does this comment mean? // You normally write \\&. for a full dot (full stop etc.); here you write only "." (i.e. a plain dot).
>
> "and we look up \"localhost\", nss-dns will send the following queries to "
> "systemd-resolved listening on 127.0.0.53:53: first \"localhost.foobar.com\", "
> "then \"localhost.barbar.com\", and finally \"localhost\". If (hopefully) the "
> "first two queries fail, systemd-resolved will synthesize an answer for the "
> "third query."

Looks all OK to me.

> Man page: systemd.resource-control.5
> Issue:    Missing closing bracket after link to Control Groups version 1

Fixed.

> Man page: systemd-sysext.8
> Issue:    In systemd-portabled.service(8): Portable Services Documentation

Updated.

> Man page: systemd.timer.5
> Issue 1:  B<systemd.exec>(1) → B<systemd.exec>(5)
> Issue 2:  This section does not (yet?) exist

Fixed.

> Man page: systemd.unit.5
> Issue:    that is → that are

Fixed.

> Man page: systemd-veritysetup-generator.8
> Issue:    systemd-veritysetup-generator → B<systemd-veritysetup-generator>
>
 > "systemd-veritysetup-generator implements B<systemd.generator>(7)\\&."
>
> "systemd-veritysetup-generator understands the following kernel command line "
> "parameters:"

Updated.

> Man page: systemd-volatile-root.service.8
> Issue:    initrdyes → Initrd

Fixed.

> Man page: sysupdate.d.5
> Issue:    : → \\&. (As above in TRANSFER)

Updated.

> Man page: sysupdate.d.5
> Issue:    some → certain

Updated.

> Man page: sysupdate.d.5
> Issue 1:  i\\&.e\\& → I\\&.e\\&

Fixed.

> Issue 2:  the image → the system

"image" seems correct.

> Man page: tmpfiles.d.5
> Issue:    systemd-tmpfiles → B<systemd-tmpfiles>(8)

Updated.
2023-01-11 17:12:54 +01:00

419 lines
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XML

<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="kernel-install" conditional='ENABLE_KERNEL_INSTALL'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>kernel-install</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>kernel-install</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>kernel-install</refname>
<refpurpose>Add and remove kernel and initrd images to and from /boot</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>kernel-install</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="plain">COMMAND</arg>
<arg choice="plain"><replaceable>KERNEL-VERSION</replaceable></arg>
<arg choice="plain"><replaceable>KERNEL-IMAGE</replaceable></arg>
<arg choice="opt" rep="repeat"><replaceable>INITRD-FILE</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>kernel-install</command> is used to install and remove kernel and initrd images
<footnote>
<para>Nowadays actually CPIO archives used as an "initramfs", rather than "initrd". See
<citerefentry><refentrytitle>bootup</refentrytitle><manvolnum>7</manvolnum></citerefentry> for an
explanation.</para>
</footnote>
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 run the executable files ("plugins") located in the
directory <filename>/usr/lib/kernel/install.d/</filename> and the local administration directory
<filename>/etc/kernel/install.d/</filename>. All files are collectively sorted and executed in lexical
order, regardless of the directory in which they live. However, files with identical filenames replace
each other. Files in <filename>/etc/kernel/install.d/</filename> take precedence over files with the
same name in <filename>/usr/lib/kernel/install.d/</filename>. This can be used to override a
system-supplied executables with a local file if needed; a symbolic link in
<filename>/etc/kernel/install.d/</filename> with the same name as an executable in
<filename>/usr/lib/kernel/install.d/</filename>, pointing to <filename>/dev/null</filename>, disables the
executable entirely. Executables must have the extension <literal>.install</literal>; other extensions
are ignored.</para>
<para>An executable placed in these directories should return <constant>0</constant> on success. It may
also return <constant>77</constant> to cause the whole operation to terminate (executables later in
lexical order will be skipped).</para>
</refsect1>
<refsect1>
<title>Commands</title>
<para>The following commands are understood:</para>
<variablelist>
<varlistentry>
<term><command>add <replaceable>KERNEL-VERSION</replaceable> <replaceable>KERNEL-IMAGE</replaceable> [<replaceable>INITRD-FILE</replaceable> ...]</command></term>
<listitem>
<para>This command expects a kernel version string and a path to a kernel image file as arguments.
Optionally, one or more initrd images may be specified as well (note that plugins might generate
additional ones). <command>kernel-install</command> calls the executable files from
<filename>/usr/lib/kernel/install.d/*.install</filename> and
<filename>/etc/kernel/install.d/*.install</filename> (i.e. the plugins) with the following
arguments:</para>
<programlisting>add <replaceable>KERNEL-VERSION</replaceable> <filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> <replaceable>KERNEL-IMAGE</replaceable> [<replaceable>INITRD-FILE</replaceable> ...]</programlisting>
<para>The third argument directly refers to the path where to place kernel images, initrd
images and other resources for <ulink url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot
Loader Specification</ulink> Type #1 entries (the "entry directory"). If other boot loader schemes
are used the parameter may be ignored. The <replaceable>ENTRY-TOKEN</replaceable> string is
typically the machine ID and is supposed to identify the local installation on the system. For
details see below.</para>
<para>Two default plugins execute the following operations in this case:</para>
<itemizedlist>
<listitem><para><command>kernel-install</command> creates
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable></filename>,
if enabled (see <varname>$KERNEL_INSTALL_LAYOUT</varname>).</para></listitem>
<listitem><para><filename>50-depmod.install</filename> runs
<citerefentry project='man-pages'><refentrytitle>depmod</refentrytitle><manvolnum>8</manvolnum></citerefentry> for the
<replaceable>KERNEL-VERSION</replaceable>.</para></listitem>
<listitem><para><filename>90-loaderentry.install</filename> copies
<replaceable>KERNEL-IMAGE</replaceable> to
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/linux</filename>.
If <replaceable>INITRD-FILE</replaceable>s are provided, it also copies them to
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL_VERSION</replaceable>/<replaceable>INITRD-FILE</replaceable></filename>.
It also creates a boot loader entry according to the <ulink
url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot Loader Specification</ulink> (Type #1) in
<filename>$BOOT/loader/entries/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.
The title of the entry is the <replaceable>PRETTY_NAME</replaceable> parameter specified in
<filename>/etc/os-release</filename> or <filename>/usr/lib/os-release</filename> (if the former
is missing), or "Linux <replaceable>KERNEL-VERSION</replaceable>", if unset.</para>
<para>If <varname>$KERNEL_INSTALL_LAYOUT</varname> is not "bls", this plugin does nothing.</para></listitem>
<listitem><para><filename>90-uki-copy.install</filename> copies a file
<filename>uki.efi</filename> from <varname>$KERNEL_INSTALL_STAGING_AREA</varname> or if it does
not exist the <replaceable>KERNEL-IMAGE</replaceable> argument, iff it has a
<literal>.efi</literal> extension, to
<filename>$BOOT/EFI/Linux/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.efi</filename>.</para>
<para>If <varname>$KERNEL_INSTALL_LAYOUT</varname> is not "uki", this plugin does nothing.</para></listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><command>remove <replaceable>KERNEL-VERSION</replaceable></command></term>
<listitem>
<para>This command expects a kernel version string as single argument. This calls executables from
<filename>/usr/lib/kernel/install.d/*.install</filename> and
<filename>/etc/kernel/install.d/*.install</filename> with the following arguments:
</para>
<programlisting>remove <replaceable>KERNEL-VERSION</replaceable> <filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
<para>Afterwards, <command>kernel-install</command> removes the entry directory
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
and its contents, if it exists.</para>
<para>Two default plugins execute the following operations in this case:</para>
<itemizedlist>
<listitem><para><filename>50-depmod.install</filename> removes the files generated by <command>depmod</command> for this kernel again.</para></listitem>
<listitem><para><filename>90-loaderentry.install</filename> removes the file
<filename>$BOOT/loader/entries/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.</para></listitem>
<listitem><para><filename>90-uki-copy.install</filename> removes the file
<filename>$BOOT/EFI/Linux/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.efi</filename>.</para></listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><command>inspect</command></term>
<listitem>
<para>Shows the various paths and parameters configured or auto-detected. In particular shows the
values of the various <varname>$KERNEL_INSTALL_*</varname> environment variables listed
below.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>The <varname>$BOOT</varname> partition</title>
<para>The partition where the kernels and <ulink url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot
Loader Specification</ulink> snippets are located is called <varname>$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/<replaceable>ENTRY-TOKEN</replaceable>/</filename> exists is used.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>-v</option></term>
<term><option>--verbose</option></term>
<listitem>
<para>Output additional information about operations being performed.</para>
</listitem>
</varlistentry>
<xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1>
<title>Environment variables</title>
<refsect2>
<title>Environment variables exported for plugins</title>
<para>If <option>--verbose</option> is used, <varname>$KERNEL_INSTALL_VERBOSE=1</varname> will be
exported for plugins. They may output additional logs in this case.</para>
<para><varname>$KERNEL_INSTALL_MACHINE_ID</varname> is set for the plugins to the desired machine-id to
use. It's always a 128-bit ID. Normally it's read from <filename>/etc/machine-id</filename>, but it can
also be overridden via <varname>$MACHINE_ID</varname> (see below). If not specified via these methods,
a fallback value will generated by <command>kernel-install</command> and used only for a single
invocation.</para>
<para><varname>$KERNEL_INSTALL_ENTRY_TOKEN</varname> is set for the plugins to the desired entry
"token" to use. It's an identifier that shall be used to identify the local installation, and is often
the machine ID, i.e. same as <varname>$KERNEL_INSTALL_MACHINE_ID</varname>, but might also be a
different type of identifier, for example a fixed string or the <varname>ID=</varname>,
<varname>IMAGE_ID=</varname> values from <filename>/etc/os-release</filename>. The string passed here
will be used to name Boot Loader Specification entries, or the directories the kernel image and initial
RAM disk images are placed into.</para>
<para>Note that while <varname>$KERNEL_INSTALL_ENTRY_TOKEN</varname> and
<varname>$KERNEL_INSTALL_MACHINE_ID</varname> are often set to the same value, the latter is guaranteed
to be a valid 32 character ID in lowercase hexadecimals while the former can be any short string. The
entry token to use is read from <filename>/etc/kernel/entry-token</filename>, if it exists. Otherwise a
few possible candidates below <varname>$BOOT</varname> are checked for Boot Loader Specification Type 1
entry directories, and if found the entry token is derived from that. If that is not successful,
<varname>$KERNEL_INSTALL_MACHINE_ID</varname> is used as fallback.</para>
<para><varname>$KERNEL_INSTALL_BOOT_ROOT</varname> is set for the plugins to the absolute path of the
root directory (mount point, usually) of the hierarchy where boot loader entries, kernel images, and
associated resources should be placed. This usually is the path where the XBOOTLDR partition or the ESP
(EFI System Partition) are mounted, and also conceptually referred to as <varname>$BOOT</varname>. Can
be overridden by setting <varname>$BOOT_ROOT</varname> (see below).</para>
<para><varname>$KERNEL_INSTALL_LAYOUT=bls|uki|other|...</varname> is set for the plugins to specify the
installation layout. Defaults to <option>bls</option> if
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable></filename> exists, or <option>other</option>
otherwise. Additional layout names may be defined by convention. If a plugin uses a special layout,
it's encouraged to declare its own layout name and configure <varname>layout=</varname> in
<filename>install.conf</filename> upon initial installation. The following values are currently
understood:</para>
<variablelist>
<varlistentry>
<term>bls</term>
<listitem>
<para>Standard <ulink url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot Loader
Specification</ulink> Type #1 layout, compatible with
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>:
entries in
<filename>$BOOT/loader/entries/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>[+<replaceable>TRIES</replaceable>].conf</filename>,
kernel and initrds under
<filename>$BOOT/<replaceable>ENTRY-TOKEN</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></para>
<para>Implemented by <filename>90-loaderentry.install</filename>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>uki</term>
<listitem>
<para>Standard <ulink
url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot Loader
Specification</ulink> Type #2 layout, compatible with
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>:
unified kernel images under <filename>$BOOT/EFI/Linux</filename> as
<filename>$BOOT/EFI/Linux/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>[+<replaceable>TRIES</replaceable>].efi</filename>.</para>
<para>Implemented by <filename>90-uki-copy.install</filename>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>other</term>
<listitem>
<para>Some other layout not understood natively by <command>kernel-install</command>.</para>
</listitem>
</varlistentry>
</variablelist>
<para><varname>$KERNEL_INSTALL_INITRD_GENERATOR</varname> is set for plugins to select the initrd
generator. This may be configured as <varname>initrd_generator=</varname> in
<filename>install.conf</filename>, see below.</para>
<para><varname>$KERNEL_INSTALL_STAGING_AREA</varname> is set for plugins to a path to a directory.
Plugins may drop files in that directory, and they will be installed as part of the loader entry, based
on the file name and extension.</para>
</refsect2>
<refsect2>
<title>Environment variables understood by <command>kernel-install</command></title>
<para><varname>$KERNEL_INSTALL_CONF_ROOT</varname> can be set to override the location of the
configuration files read by <command>kernel-install</command>. When set,
<filename>install.conf</filename>, <filename>entry-token</filename>, and other files will be
read from this directory.</para>
<para><varname>$KERNEL_INSTALL_PLUGINS</varname> can be set to override the list of plugins executed by
<command>kernel-install</command>. The argument is a whitespace-separated list of paths.
<literal>KERNEL_INSTALL_PLUGINS=:</literal> may be used to prevent any plugins from running.
</para>
<para><varname>$MACHINE_ID</varname> can be set for <command>kernel-install</command> to override
<varname>$KERNEL_INSTALL_MACHINE_ID</varname>, the machine ID.</para>
<para><varname>$BOOT_ROOT</varname> can be set for <command>kernel-install</command> to override
<varname>$KERNEL_INSTALL_BOOT_ROOT</varname>, the installation location for boot entries.</para>
<para>The last two variables may also be set in <filename>install.conf</filename>. Variables set in the
environment take precedence over the values specified in the config file.</para>
</refsect2>
</refsect1>
<refsect1>
<title>Exit status</title>
<para>If every executable returns 0 or 77, 0 is returned, and a non-zero failure code otherwise.</para>
</refsect1>
<refsect1>
<title>Files</title>
<variablelist>
<varlistentry>
<term>
<filename>/usr/lib/kernel/install.d/*.install</filename>
<filename>/etc/kernel/install.d/*.install</filename>
</term>
<listitem>
<para>Drop-in files which are executed by kernel-install.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/usr/lib/kernel/cmdline</filename>
<filename>/etc/kernel/cmdline</filename>
<filename>/proc/cmdline</filename>
</term>
<listitem>
<para>Read by <filename>90-loaderentry.install</filename>. The content of the file
<filename>/etc/kernel/cmdline</filename> specifies the kernel command line to use. If that file
does not exist, <filename>/usr/lib/kernel/cmdline</filename> is used. If that also does not
exist, <filename>/proc/cmdline</filename> is used. <varname>$KERNEL_INSTALL_CONF_ROOT</varname>
may be used to override the path.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/kernel/tries</filename>
</term>
<listitem>
<para>Read by <filename>90-loaderentry.install</filename> and
<filename>90-uki-copy.install</filename>. If this file exists a numeric value is read from it
and the naming of the generated entry file or UKI is slightly altered to include it as
<filename>$BOOT/loader/entries/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>+<replaceable>TRIES</replaceable>.conf</filename>
or
<filename>$BOOT/EFI/Linux/<replaceable>ENTRY-TOKEN</replaceable>-<replaceable>KERNEL-VERSION</replaceable>+<replaceable>TRIES</replaceable>.conf</filename>, respectively. This
is useful for boot loaders such as
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>
which implement boot attempt counting with a counter embedded in the entry file name.
<varname>$KERNEL_INSTALL_CONF_ROOT</varname> may be used to override the path.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/kernel/entry-token</filename>
</term>
<listitem>
<para>If this file exists it is read and used as "entry token" for this system, i.e. is used for
naming Boot Loader Specification entries, see <varname>$KERNEL_INSTALL_ENTRY_TOKEN</varname>
above for details. <varname>$KERNEL_INSTALL_CONF_ROOT</varname> may be used to override the
path.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/machine-id</filename>
</term>
<listitem>
<para>The content of this file specifies the machine identification
<replaceable>MACHINE-ID</replaceable>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/os-release</filename>
<filename>/usr/lib/os-release</filename>
</term>
<listitem>
<para>Read by <filename>90-loaderentry.install</filename>.
If available, <varname>PRETTY_NAME=</varname> is read from these files and used as the title of the boot menu entry.
Otherwise, <literal>Linux <replaceable>KERNEL-VERSION</replaceable></literal> will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/usr/lib/kernel/install.conf</filename>
<filename>/etc/kernel/install.conf</filename>
</term>
<listitem>
<para>Configuration options for <command>kernel-install</command>, as a series of
<varname>KEY=</varname><replaceable>VALUE</replaceable> assignments, compatible with shell
syntax, following the same rules as described in
<citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
<filename>/etc/kernel/install.conf</filename> will be read if present, and
<filename>/usr/lib/kernel/install.conf</filename> otherwise. This file is optional.
<varname>$KERNEL_INSTALL_CONF_ROOT</varname> may be used to override the path.
</para>
<para>Currently, the following keys are supported:
<varname>MACHINE_ID=</varname>,
<varname>BOOT_ROOT=</varname>,
<varname>layout=</varname>,
<varname>initrd_generator=</varname>.
See the Environment variables section above for details.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>depmod</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
<ulink url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot Loader Specification</ulink>
</para>
</refsect1>
</refentry>