change initramfs by hand? Post: 302270157

Sponsored Content

Operating Systems Linux Debian change initramfs by hand? Post 302270157 by frankie06 on Friday 19th of December 2008 08:12:18 PM

12-19-2008

Registered User

Quote:

Originally Posted by era

In fact, I think the tangent into Grub is wrong. I'd like to suggest you trace back a few steps and explain what exactly you are trying to accomplish. Have you looked at update-initramfs and the initramfs-tools? My understanding of these is limited, but it looks to me like it's what you should be using. But of course, if you know better, perhaps you could at least expand a bit on this topic.

Yes I tried update-initramfs and it works fine in general. There are some important reasons for also trying to understand/modify the initrd directly:

1. to modify the scripts that update-initramfs installs but don't work correctly. E.g. the part that mounts the / filesystem fails if that disk is not ready immediately (but e.g. via USB); it is recognized 5 seconds later, but by then it's too late.

2. to modify the initrd on a different computer, or via a different operating system on the same computer. This is necessary if the initrd does not boot. The update-initramfs cannot help here since it assumes that things in the initrd should be as under the currently running OS.

frankie06

View Public Profile for frankie06

Find all posts by frankie06

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Give us a hand

How do you get an awk output into columns i.e. awk (print $1,$2,$3) doesn't come out into nice columns but lots of lines of txt want something more like. I am crap at unix so give me a hand thx Rich

2. Shell Programming and Scripting

How to get the most left hand string ??

Hi, I remember once seeing a way to get the left most string in a word. Let's say: a="First.Second.Third" (separated by dot) echo ${a#*.} shows --> Second.Third echo ${a##*.} shows --> Third How do I get the the left most string "First" Or "First.Second" ??? Tried to replace #...

3. Shell Programming and Scripting

Need a hand. Please?

i have a script in sh. with awk, e.g. want to list all the contents of a subdirectory an a tabular way. ej: outoput directory1 subdirectory1 subdirectory2 subdirectory3 file1 filen file2 filez file2 ... filen+1 ...

4. Shell Programming and Scripting

AWK how to strip from right hand side

guys, i am writing a .ksh file to ssh to a remote machine and change all occurances of .ixf to .WIP like this : -->>> for i in *.ixf do echo $i done mv $i $i.WIP exit <<--- --> this returns .ixf.WIP - i can live with that. then i need to sftp from another remote machine, copy the files...

5. Linux

initramfs on 2.4 kernel

Is there a patch available to support initramfs on the 2.4 kernel? We can't upgrade to 2.6 for legacy purposes. All I found on google were early references to how initramfs is better than the 2.4 initrd. Thanks much!

6. Debian

Only have initramfs now...

Long story short, I had a ps3 with both Lenny and Sid repositories. Knowing this is a bad idea and that Lenny is being deprecated I decided I wanted to move everything to Sid. I changed my repos and ran apt-get-update, upgrade, dist-upgrade. Had one warning during the apt-get upgrade that...

7. Shell Programming and Scripting

Merge left hand strings mapping to different right hand strings

Hello, I am working on an Urdu to Hindi dictionary which has the following structure: a=b a=c n=d n=q and so on. i.e. Headword separated from gloss by a = I am giving below a live sample بتا=बता بتا=बित्ता بتا=बुत्ता بتان=बतान بتان=बितान بتانا=बिताना I need the following...

8. UNIX for Beginners Questions & Answers

Why bind to LiveCD /proc before building initramfs ?

Imagine I have an unbootable system where I need to update the kernel image using update-initramfs. I have seen numerous examples online which show the following $ mount -t proc none /mnt/ubuntu/proc $ mount -o bind /dev /mnt/ubuntu/dev $ mount -o bind /sys /mnt/ubuntu/sys After that we...

9. UNIX for Beginners Questions & Answers

Just want to ask if there is a shorter hand to doing this one liner

Hi all, In Oracle, I am using SQL*Plus and selecting all rows in a table and spooling to a file as pipe delimited. I have to use pagesize 0 but unfortunately, using this option excludes the header and I can't get around having it to display the header fields. So to get around this, I have to...

LEARN ABOUT DEBIAN

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)