Section: initramfs.conf manual (5)
initramfs.conf - configuration file for mkinitramfs
The behaviour of mkinitramfs can be modified by its configuration file.
Each line in the file can be a configuration variable, a blank line, or a comment. The value of an variable is assigned by an statement of the form: name=[value]
Configuration options can be broken out into configuration snippets and placed in individual files in the /etc/initramfs-tools/conf.d directory. Files in this directory are always read after the main configuration file, so you can override the settings in the main config file without editing it directly.
Modules listed in /etc/initramfs-tools/modules and /usr/share/initramfs-tools/modules.d/* are always included in the initramfs, and are loaded early in the boot process.
list doesn't load any additional modules at boot time, other than those listed in the above files.
most adds most file system, all ata, sata, scsi and usb drivers.
dep tries to guess which modules are necessary for the running box and only adds those modules.
netboot adds the base and network modules, but skips block devices.
The default setting is most.
:KEYMAP <DD CLASS="c2|If set to 'y', the console keymap will be loaded during the initramfs stage. The keymap will anyway be loaded by the initscripts later, and the packages that might need input will normally set this variable automatically, so there should normally be no need to set this.:
:UMASK <DD CLASS="c2|Set the umask value of the generated initramfs file. Useful to not disclose eventual keys.:
:DEVICE <DD CLASS="c2|Specifies the network interface, like eth0.:
:ROOT <DD CLASS="c2|Allows optional root bootarg hardcoding, when no root bootarg can be passed. A root bootarg overrides that special setting.:
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