08-23-2012
[edit] Ignore that. Far too early in the morning. My apologies.
Also, thanks for teaching me things I didn't know about ash. I have confirmed that it supports all the things you show. It having functions makes it a much more useful shell than I realized.
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LEARN ABOUT DEBIAN
initramfs.conf
INITRAMFS.CONF(5) initramfs.conf manual INITRAMFS.CONF(5)
NAME
initramfs.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 direc-
tory. 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.
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.
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 normally be no need to
set this.
COMPRESS
Specifies the compression method used for the initramfs image. mkinitramfs will default to gzip if the kernel lacks support (CON-
FIG_RD) or the corresponding userspace utility is not present.
UMASK Set the umask value of the generated initramfs file. Useful to not disclose eventual keys.
NFS VARIABLES
BOOT Allows one 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.
FILES
/etc/initramfs-tools/initramfs.conf
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 ALSO
initramfs-tools(8), mkinitramfs(8), update-initramfs(8).
Linux 2010/11/22 INITRAMFS.CONF(5)