Core dracut modules
The organization and categories of dracut modules below are only meant for gaining better understanding of what each module does. In the dracut source code, there are no specific types or categories for dracut modules.
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shell
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library (usually included by other dracut modules as a dependency and not directly by user)
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filesystems (kernel module and corresponding user-space utilities for a filesystem)
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device (kernel module and corresponding user space utilities for a device).
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kernel (only kernel modules, no user-space utilities)
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utils (no kernel module, only user-space utilities)
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meta (only for making decision which other modules to include)
core
| Module | Description | Type |
|---|---|---|
base |
Base module with required utilities |
library |
bash |
bash (bash is preferred interpreter if there more of them available) |
shell |
biosdevname |
BIOS network device renaming |
utils |
btrfs |
filesystem |
|
busybox |
shell |
|
caps |
drop capabilities before init |
|
convertfs |
Merges / into /usr on next boot |
|
crypt |
encrypted LUKS filesystems and cryptsetup |
filesystem |
crypt-gpg |
GPG for crypto operations and SmartCards (may requires GPG keys) |
|
crypt-loop |
encrypted loopback devices (symmetric key) |
|
dash |
shell |
|
debug |
debug features |
|
dm |
device-mapper |
library |
dmraid |
DMRAID arrays |
|
dmsquash-live |
SquashFS images |
|
dmsquash-live-autooverlay |
creates a partition for overlayfs usage in the free space on the root filesystem’s parent block device |
|
dmsquash-live-ntfs |
SquashFS images located in NTFS filesystems |
|
drm |
kernel modules for DRM (complex graphics devices) |
kernel |
ecryptfs |
kernel module for ecryptfs (stacked cryptographic filesystem) |
filesystem |
fips |
Enforces FIPS security standard regulations |
|
fips-crypto-policies |
crypto-policies |
utils |
fs-lib |
filesystem tools (including fsck.* and mount) |
library |
fstab-sys |
Arranges for arbitrary partitions to be mounted before rootfs |
|
hwdb |
Includes hardware database |
utils |
i18n |
Includes keymaps, console fonts, etc. |
|
img-lib |
Includes various tools for decompressing images |
library |
integrity |
Extended Verification Module and ima-evm-utils |
|
kernel-modules |
kernel modules for root filesystems and other boot-time devices |
kernel |
kernel-modules-extra |
extra out-of-tree kernel modules |
kernel |
lvm |
LVM devices |
|
lvmthinpool-monitor |
Monitor LVM thinpool service |
|
masterkey |
masterkey that can be used to decrypt other keys and keyutils |
|
mdraid |
kernel module for md raid cluster, mdadm |
device |
modsign |
||
multipath |
multipath devices |
device |
nvdimm |
non-volatile DIMM devices |
device |
numlock |
turn Num Lock on |
device |
overlayfs |
kernel module for overlayfs |
filesystem |
ppcmac |
thermal for PowerPC |
device |
qemu |
kernel modules to boot inside qemu |
kernel |
lunmask |
Masks LUN devices to select only ones which required to boot |
|
plymouth |
show splash via plymouth |
utils |
pollcdrom |
polls CD-ROM |
|
rescue |
utilities for rescue mode (such as ping, ssh, vi, fsck.*) |
utils |
resume |
resume from low-power state |
|
rootfs-block |
mount block device as rootfs |
device |
securityfs |
mount securityfs early |
filesystem |
selinux |
selinux policy |
|
shutdown |
Sets up hooks to run on shutdown |
|
syslog |
Includes syslog capabilites |
utils |
terminfo |
Includes a terminfo file |
utils |
udev-rules |
Includes udev and some basic rules |
library |
uefi-lib |
Includes UEFI tools |
library |
usrmount |
mounts /usr |
|
virtfs |
virtual filesystems (9p) |
filesystem |
virtiofs |
filesystem |
|
warpclock |
Sets kernel’s timezone and reset the system time if adjtime is set to LOCAL |
|
watchdog |
Includes watchdog devices management; works only if systemd not in use |
|
watchdog-modules |
kernel modules for watchdog loaded early in booting |
kernel |