change initramfs by hand? Post: 302268903

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Operating Systems Linux Debian change initramfs by hand? Post 302268903 by frankie06 on Tuesday 16th of December 2008 02:00:12 PM

12-16-2008

Registered User

Quote:

Originally Posted by otheus

Could you post your grub.conf file please?

Sure, but I don't think the grub.conf matters too much; it boots the original initrd just fine, and I don't modify any grub files when trying the new initrd.

BTW where is grub.conf? The only grub files I see are in /boot/grub, and the only human-readable ones are "default", "device.map" and "menu.lst". The first is empty except comments, the second only contains the lines

(hd0) /dev/hda
(hd1) /dev/sda

but seems to be unimportant as the unmodified initrd boots just the same when switching this to

(hd0) /dev/sda
(hd1) /dev/hda

and the third contains the usual kernel and initrd config, but it boots the unmodified initrd fine and I never modify it. Instead I change the link initrd.img in /boot to point to the modified initrd. There's still a grub entry using an initrd called initrd.img-2.6.26-1-686 which I never modify, and that always boots. Given that initrd.img-2.6.26-1-686 and the unmodified initrd.img are binary equal, the file menu.lst probably isn't the problem either.

Something else occured to me: do I need to specify the --format option in cpio? E.g. change from "bin" to "newc" format? Because when I look at the (gunzipped) initrd in boot with "file", it says:

"ASCII cpio archive (SVR4 with no CRC)".

But this is not the default which cpio creates.

frankie06

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LEARN ABOUT DEBIAN

dracut-catimages

DRACUT-CATIMAGES(8)						      dracut						       DRACUT-CATIMAGES(8)

NAME

       dracut-catimages - creates initial ramdisk image by concatenating images

SYNOPSIS

       dracut-catimages [OPTION...] <initramfs base image> [<image>...]

DESCRIPTION

       dracut-catimages creates an initial ramdisk image by concatenating several images from the command line and /boot/dracut/*.img

OPTIONS

       -f, --force
	   overwrite existing initramfs file.

       -i, --imagedir
	   Directory with additional images to add (default: /boot/dracut/)

       -o, --overlaydir
	   Overlay directory, which contains additional files that will be used to create an additional image

       --nooverlay
	   Do not use the overlay directory

       --noimagedir
	   Do not use the additional image directory

       -h, --help
	   display help text and exit.

       --debug
	   output debug information of the build process

       -v, --verbose
	   verbose output during the build process

FILES

       /boot/dracut/*.img
	   images to work with

AUTHORS

       Harald Hoyer

AVAILABILITY

       The dracut-catimages command is part of the dracut package and is available from https://dracut.wiki.kernel.org

SEE ALSO

       dracut(8)

dracut								    11/08/2012						       DRACUT-CATIMAGES(8)