MODULES-LOAD.D(5) modules-load.d MODULES-LOAD.D(5)
modules-load.d - Configure kernel modules to load at boot
systemd-modules-load.service(8) reads files from the above directories
which contain kernel modules to load during boot in a static list. Each
configuration file is named in the style of
/etc/modules-load.d/program.conf. Note that it is usually a better idea
to rely on the automatic module loading by PCI IDs, USB IDs, DMI IDs or
similar triggers encoded in the kernel modules themselves instead of
static configuration like this. In fact, most modern kernel modules are
prepared for automatic loading already.
The configuration files should simply contain a list of kernel module
names to load, separated by newlines. Empty lines and lines whose first
non-whitespace character is # or ; are ignored.
CONFIGURATION DIRECTORIES AND PRECEDENCE
Configuration files are read from directories in /etc/, /run/, and
/usr/lib/, in order of precedence. Each configuration file in these
configuration directories shall be named in the style of filename.conf.
Files in /etc/ override files with the same name in /run/ and
/usr/lib/. Files in /run/ override files with the same name in
Packages should install their configuration files in /usr/lib/. Files
in /etc/ are reserved for the local administrator, who may use this
logic to override the configuration files installed by vendor packages.
All configuration files are sorted by their filename in lexicographic
order, regardless of which of the directories they reside in. If
multiple files specify the same option, the entry in the file with the
lexicographically latest name will take precedence. It is recommended
to prefix all filenames with a two-digit number and a dash, to simplify
the ordering of the files.
If the administrator wants to disable a configuration file supplied by
the vendor, the recommended way is to place a symlink to /dev/null in
the configuration directory in /etc/, with the same filename as the
vendor configuration file. If the vendor configuration file is included
in the initrd image, the image has to be regenerated.
Example 1. /etc/modules-load.d/virtio-net.conf example:
# Load virtio-net.ko at boot
systemd(1), systemd-modules-load.service(8), systemd-delta(1),
systemd 231 MODULES-LOAD.D(5)