3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
5 This file is part of systemd.
7 Copyright 2011 Lennart Poettering
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 <refentry id="modules-load.d" conditional='HAVE_KMOD'>
25 <title>modules-load.d</title>
26 <productname>systemd</productname>
30 <contrib>Developer</contrib>
31 <firstname>Lennart</firstname>
32 <surname>Poettering</surname>
33 <email>lennart@poettering.net</email>
39 <refentrytitle>modules-load.d</refentrytitle>
40 <manvolnum>5</manvolnum>
44 <refname>modules-load.d</refname>
45 <refpurpose>Configure kernel modules to load at boot</refpurpose>
49 <para><filename>/etc/modules-load.d/*.conf</filename></para>
50 <para><filename>/run/modules-load.d/*.conf</filename></para>
51 <para><filename>/usr/lib/modules-load.d/*.conf</filename></para>
55 <title>Description</title>
57 <para><citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
58 reads files from the above directories which contain
59 kernel modules to load during boot in a static list.
60 Each configuration file is named in the style of
61 <filename>/etc/modules-load.d/<replaceable>program</replaceable>.conf</filename>. Note
62 that it is usually a better idea to rely on the
63 automatic module loading by PCI IDs, USB IDs, DMI IDs
64 or similar triggers encoded in the kernel modules
65 themselves instead of static configuration like
66 this. In fact, most modern kernel modules are prepared
67 for automatic loading already.</para>
71 <title>Configuration Format</title>
73 <para>The configuration files should simply contain a
74 list of kernel module names to load, separated by
75 newlines. Empty lines and lines whose first
76 non-whitespace character is # or ; are ignored.</para>
78 <para>Each configuration file shall be named in the
79 style of <filename><replaceable>program</replaceable>.conf</filename>.
80 Files in <filename>/etc/</filename> override files
81 with the same name in <filename>/usr/lib/</filename>
82 and <filename>/run/</filename>. Files in
83 <filename>/run/</filename> override files with the
84 same name in <filename>/usr/lib/</filename>. Packages
85 should install their configuration files in
86 <filename>/usr/lib/</filename>, files in
87 <filename>/etc/</filename> are reserved for the local
88 administrator, who may use this logic to override the
89 configuration files installed from vendor
92 <para>If the administrator wants to disable a
93 configuration file supplied by the vendor, the
94 recommended way is to place a symlink to
95 <filename>/dev/null</filename> in
96 <filename>/etc/modules-load.d/</filename> bearing the
101 <title>Example</title>
103 <title>/etc/modules-load.d/virtio-net.conf example:</title>
105 <programlisting># Load virtio-net.ko at boot
106 virtio-net</programlisting>
111 <title>See Also</title>
113 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
114 <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
115 <citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
116 <citerefentry><refentrytitle>modprobe</refentrytitle><manvolnum>8</manvolnum></citerefentry>