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+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+ This file is part of systemd.
+
+ Copyright 2013 Harald Hoyer
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="kernel-install">
+
+ <refentryinfo>
+ <title>kernel-install</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Harald</firstname>
+ <surname>Hoyer</surname>
+ <email>harald@redhat.com</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>kernel-install</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>kernel-install</refname>
+ <refpurpose>Add and remove kernel and initramfs images to and from /boot</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>kernel-install</command>
+ <arg choice="plain">COMMAND</arg>
+ <arg choice="plain"><replaceable>KERNEL-VERSION</replaceable></arg>
+ <arg choice="opt"><replaceable>KERNEL-IMAGE</replaceable></arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <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>
+
+ <para><command>kernel-install</command> will execute the files
+ 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 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></command></term>
+ <listitem>
+ <para><command>kernel-install</command> creates the directory
+ <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
+ and calls every executable
+ <filename>/usr/lib/kernel/install.d/*.install</filename> and
+ <filename>/etc/kernel/install.d/*.install</filename> with
+ the arguments
+ <programlisting>add <replaceable>KERNEL-VERSION</replaceable> <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
+ </para>
+
+ <para>The kernel-install plugin <filename>50-depmod.install</filename> runs depmod for the <replaceable>KERNEL-VERSION</replaceable>.</para>
+
+ <para>The kernel-install plugin
+ <filename>90-loaderentry.install</filename> copies
+ <replaceable>KERNEL-IMAGE</replaceable> to
+ <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/linux</filename>.
+ It also creates a boot loader entry according to the boot
+ loader specification in
+ <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 "GNU/Linux
+ <replaceable>KERNEL-VERSION</replaceable>", if unset. If
+ the file <filename>initrd</filename> is found next to the
+ <filename>linux</filename> file, the initrd will be added to
+ the configuration.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><command>remove <replaceable>KERNEL-VERSION</replaceable></command></term>
+ <listitem>
+ <para>Calls every executable <filename>/usr/lib/kernel/install.d/*.install</filename>
+ and <filename>/etc/kernel/install.d/*.install</filename> with the arguments
+ <programlisting>remove <replaceable>KERNEL-VERSION</replaceable> <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
+ </para>
+
+ <para><command>kernel-install</command> removes the entire directory
+ <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> afterwards.</para>
+
+ <para>The kernel-install plugin <filename>90-loaderentry.install</filename> removes the file
+ <filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.</para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Exit status</title>
+ <para>If every executable returns with 0, 0 is returned, 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>/etc/kernel/cmdline</filename>
+ <filename>/proc/cmdline</filename>
+ </term>
+ <listitem>
+ <para>The content of the file <filename>/etc/kernel/cmdline</filename> specifies the kernel command line to use.
+ If that file does not exist, <filename>/proc/cmdline</filename> is used.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <filename>/etc/machine-id</filename>
+ </term>
+ <listitem>
+ <para>The content of the 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>The content of the file specifies the operating system title <replaceable>PRETTY_NAME</replaceable>.</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>,
+ <ulink url="http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec">Boot loader specification</ulink>
+ </para>
+ </refsect1>
+
+</refentry>