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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update-initramfs.conf

UPDATE-INITRAMFS.CONF(5)				   update-initramfs.conf manual 				  UPDATE-INITRAMFS.CONF(5)

NAME

       update-initramfs.conf - configuration file for update-initramfs

DESCRIPTION

       The configuration file allows one to disable the update action from update-initramfs.

GENERAL VARIABLES

	update_initramfs
	      Default  is  yes	for  running  the  latest  initramfs-tools  hooks  in the newest Linux image.  Setting it to all updates any known
	      initramfs.  It is possible to set it to no for remote servers or boxes where conservative manners needs to be applied. This disables
	      the update_initramfs -u call.

	backup_initramfs
	      If set update_initramfs keeps an .bak file of the previous initramfs. If unset the backup initramfs will not be kept.

FILES

       /etc/initramfs-tools/update-initramfs.conf

AUTHOR

       The initramfs-tools are written by Maximilian Attems <maks@debian.org>, Jeff Bailey <jbailey@raspberryginger.com> and numerous others.

SEE ALSO

	initramfs.conf(5), initramfs-tools(8), mkinitramfs(8), update-initramfs(8).

Linux								    2010/04/05						  UPDATE-INITRAMFS.CONF(5)