DRACUT.CONF(5) dracut DRACUT.CONF(5)
NAME
dracut.conf - configuration file(s) for dracut
SYNOPSIS
/etc/dracut.conf /etc/dracut.conf.d/*.conf
/usr/lib/dracut/dracut.conf.d/*.conf
DESCRIPTION
dracut.conf is loaded during the initialisation phase of dracut.
Command line parameter will override any values set here.
*.conf files are read from /usr/lib/dracut/dracut.conf.d and
/etc/dracut.conf.d. Files with the same name in /etc/dracut.conf.d will
replace files in /usr/lib/dracut/dracut.conf.d. The files are then read
in alphanumerical order and will override parameters set in
/etc/dracut.conf. Each line specifies an attribute and a value. A #
indicates the beginning of a comment; following characters, up to the
end of the line are not interpreted.
dracut command line options will override any values set here.
Configuration files must have the extension .conf; other extensions are
ignored.
add_dracutmodules+=" <dracut modules> "
Add a space-separated list of dracut modules to call when building
the initramfs. Modules are located in /usr/lib/dracut/modules.d.
dracutmodules+=" <dracut modules> "
Specify a space-separated list of dracut modules to call when
building the initramfs. Modules are located in
/usr/lib/dracut/modules.d. This option forces dracut to only
include the specified dracut modules. In most cases the
"add_dracutmodules" option is what you want to use.
omit_dracutmodules+=" <dracut modules> "
Omit a space-separated list of dracut modules to call when building
the initramfs. Modules are located in /usr/lib/dracut/modules.d.
drivers+=" <kernel modules> "
Specify a space-separated list of kernel modules to exclusively
include in the initramfs. The kernel modules have to be specified
without the ".ko" suffix.
add_drivers+=" <kernel modules> "
Specify a space-separated list of kernel modules to add to the
initramfs. The kernel modules have to be specified without the
".ko" suffix.
force_drivers+=" <list of kernel modules> "
See add_drivers above. But in this case it is ensured that the
drivers are tried to be loaded early via modprobe.
omit_drivers+=" <kernel modules> "
Specify a space-separated list of kernel modules not to add to the
initramfs. The kernel modules have to be specified without the
".ko" suffix.
filesystems+=" <filesystem names> "
Specify a space-separated list of kernel filesystem modules to
exclusively include in the generic initramfs.
drivers_dir="<kernel modules directory>"
Specify the directory, where to look for kernel modules
fw_dir+=" :<dir>[:<dir> ...] "
Specify additional directories, where to look for firmwares,
separated by :
install_items+=" <file>[ <file> ...] "
Specify additional files to include in the initramfs, separated by
spaces.
install_optional_items+=" <file>[ <file> ...] "
Specify additional files to include in the initramfs, separated by
spaces, if they exist.
compress="{bzip2|lzma|xz|gzip|lzo|lz4|zstd|<compressor [args ...]>}"
Compress the generated initramfs using the passed compression
program. If you pass it just the name of a compression program, it
will call that program with known-working arguments. If you pass
arguments, it will be called with exactly those arguments.
Depending on what you pass, this may result in an initramfs that
the kernel cannot decompress.
do_strip="{yes|no}"
Strip binaries in the initramfs (default=yes)
hostonly="{yes|no}"
Host-Only mode: Install only what is needed for booting the local
host instead of a generic host and generate host-specific
configuration.
hostonly_cmdline="{yes|no}"
If set to "yes", store the kernel command line arguments needed in
the initramfs
persistent_policy="<policy>"
Use <policy> to address disks and partitions. <policy> can be any
directory name found in /dev/disk. E.g. "by-uuid", "by-label"
tmpdir="<temporary directory>"
Specify temporary directory to use.
Warning
If chrooted to another root other than the real root device, use
--fstab and provide a valid /etc/fstab.
use_fstab="{yes|no}"
Use /etc/fstab instead of /proc/self/mountinfo.
add_fstab+=" <filename> "
Add entries of <filename> to the initramfs /etc/fstab.
add_device+=" <device> "
Bring up <device> in initramfs, <device> should be the device name.
This can be useful in hostonly mode for resume support when your
swap is on LVM an encrypted partition.
mdadmconf="{yes|no}"
Include local /etc/mdadm.conf (default=yes)
lvmconf="{yes|no}"
Include local /etc/lvm/lvm.conf (default=yes)
fscks=" <fsck tools> "
Add a space-separated list of fsck tools. If nothing is specified,
the default is: "umount mount /sbin/fsck* xfs_db xfs_check
xfs_repair e2fsck jfs_fsck reiserfsck btrfsck". The installation is
opportunistic (non-existing tools are ignored).
nofscks="{yes|no}"
If specified, inhibit installation of any fsck tools.
ro_mnt="{yes|no}"
Mount / and /usr read-only by default.
kernel_cmdline="parameters"
Specify default kernel command line parameters
kernel_only="{yes|no}"
Only install kernel drivers and firmware files. (default=no)
no_kernel="{yes|no}"
Do not install kernel drivers and firmware files (default=no)
acpi_override="{yes|no}"
[WARNING] ONLY USE THIS IF YOU KNOW WHAT YOU ARE DOING!
Override BIOS provided ACPI tables. For further documentation read
Documentation/acpi/initrd_table_override.txt in the kernel sources.
Search for ACPI table files (must have .aml suffix) in
acpi_table_dir= directory (see below) and add them to a separate
uncompressed cpio archive. This cpio archive gets glued
(concatenated, uncompressed one must be the first one) to the
compressed cpio archive. The first, uncompressed cpio archive is
for data which the kernel must be able to access very early (and
cannot make use of uncompress algorithms yet) like microcode or
ACPI tables (default=no).
acpi_table_dir="<dir>"
Directory to search for ACPI tables if acpi_override= is set to
yes.
early_microcode="{yes|no}"
Combine early microcode with ramdisk (default=yes)
stdloglvl="{0-6}"
Set logging to standard error level.
sysloglvl="{0-6}"
Set logging to syslog level.
fileloglvl="{0-6}"
Set logging to file level.
logfile="<file>"
Path to log file.
show_modules="{yes|no}"
Print the name of the included modules to standard output during
build.
i18n_vars="<variable mapping>"
Distribution specific variable mapping. See
dracut/modules.d/10i18n/README for a detailed description.
i18n_default_font="<fontname>"
The font <fontname> to install, if not specified otherwise. Default
is "LatArCyrHeb-16".
i18n_install_all="{yes|no}"
Install everything regardless of generic or hostonly mode.
reproducible="{yes|no}"
Create reproducible images.
loginstall="<DIR>"
Log all files installed from the host to <DIR>.
uefi_stub="<FILE>"
Specifies the UEFI stub loader, which will load the attached
kernel, initramfs and kernel command line and boots the kernel. The
default is
/lib/systemd/boot/efi/linux<EFI-MACHINE-TYPE-NAME>.efi.stub or
/usr/lib/gummiboot/linux<EFI-MACHINE-TYPE-NAME>.efi.stub
kernel_image="<FILE>"
Specifies the kernel image, which to include in the UEFI
executable. The default is /lib/modules/<KERNEL-VERSION>/vmlinuz or
/boot/vmlinuz-<KERNEL-VERSION>
FILES
/etc/dracut.conf
Old configuration file. You better use your own file in
/etc/dracut.conf.d/.
/etc/dracut.conf.d/
Any /etc/dracut.conf.d/*.conf file can override the values in
/etc/dracut.conf. The configuration files are read in
alphanumerical order.
AUTHOR
Harald Hoyer
SEE ALSO
dracut(8) dracut.cmdline(7)
dracut 07/15/2025 DRACUT.CONF(5)
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