kernel presentation at ILUG on Sat.

[James Sissel]

Thanks.  Now I understand why my compile with reiserfs as a module wouldn't
boot.

-----Original Message-----
From: Charles Steinkuehler [mailto:charles at steinkuehler.net]
Sent: Monday, May 05, 2003 11:46 AM
To: James Sissel
Cc: kclug at kclug.org
Subject: Re: kernel presentation at ILUG on Sat.

James Sissel wrote:
> Thank you, Charles.  It was an excellent presentation.
> 
> One part I missed.  How did you uncompress and mount the initrd?  I'd like
> to take a look at my current one.  If I modified it how would I recompress
> it back into an .img?

The initial ramdisk images are simply gzipped filesystem images, so you 
can gzip or gunzip as appropriate to go between the .img format used to 
boot and the "raw" format you can mount with the loopback option.

<Snip>

To uncompress and mount an initial ramdisk file, then re-create a new 
initial ramdisk image (from a handy RH7.2 system):

[root at falcon boot]# cd /boot
[root at falcon boot]# gunzip <initrd-2.4.9-13.img >/tmp/image
[root at falcon boot]# mount -o loop /tmp/image /mnt

...<edit ramdisk image at /mnt as desired>...

[root at falcon boot]# gzip </tmp/image >initrd-2.4.9-13-new.img

...edit bootloader as desired (or manipulate filenames) to use new 
ramdisk image.  If you're using lilo, remember to run lilo at the 
command prompt to update the block-map file.  Grub users can simply reboot.

-- 
Charles Steinkuehler
charles at steinkuehler.net

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