INITRAMFS.CONF(5)initramfs.conf manual INITRAMFS.CONF(5)NAMEinitramfs.conf - configuration file for mkinitramfs
DESCRIPTION
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/mkinitramfs/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.
GENERAL VARIABLES
MODULES
Specifies the modules for the initramfs image. The default set‐
ting is most.
most adds all the framebuffer, acpi, file system, ide, sata,
scsi and usb drivers.
dep tries to guess which modules are necessary for the running
box.
netboot adds the base modules, network modules, but skips block
devices.
list includes only modules from the additional modules list to
load them early.
BUSYBOX
Include busybox utilities for the boot scripts. If set to 'n'
mkinitramfs will build an initramfs without busybox. Beware
that many boot scripts need busybox utilities.
KEYMAP
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 nor‐
mally be no need to set this.
COMPCACHE_SIZE
Amount of RAM to use for RAM-based compressed swap space. The
default is not to use compcache.
An empty value - compcache isn't used, or added to the initramfs
at all.
An integer and K (e.g. 65536 K) - use a number of kilobytes.
An integer and M (e.g. 256 M) - use a number of megabytes.
An integer and G (e.g. 1 G) - use a number of gigabytes.
An integer and % (e.g. 50 %) - use a percentage of the amount of
RAM.
You can optionally install the compcache package to configure
this setting via debconf and have userspace scripts to load and
unload compcache.
NFS VARIABLES
BOOT Allows to use an nfs drive as the root of the drive. The
default is to boot from local media (hard drive, USB stick).
Set to nfs for an NFS root share.
DEVICE
Specifies the network interface, like eth0.
ROOT Allows optional root bootarg hardcoding, when no root bootarg
can be passed. A root bootarg overrides that special setting.
NFSROOT
Defaults to auto in order to pick up value from DHCP server.
Otherwise you need to specify HOST:MOUNT.
AUTHOR
The initramfs-tools are written by Maximilian Attems <maks@debian.org>,
Jeff Bailey <jbailey@raspberryginger.com> and numerous others. Loosely
based on mkinitrd.conf by Herbert Xu.
SEE ALSOinitramfs-tools(8), mkinitramfs(8), update-initramfs(8).
$Date: 2007/01/01 $ INITRAMFS.CONF(5)
