[Fedora-livecd-list] Modifying ISO to include per-user files

Todd N todd655495 at yahoo.com
Mon Jun 30 18:55:58 UTC 2008


Thanks much for the info, Jeremy.  I ran the mkisofs script as you specified below (we are on an i386 architecture) and re-burned a CD from the newly-created ISO file.  On booting, it gets to the point where it says "Booting the kernel.", hangs for a few seconds, then the following appears on the screen:
 
--------------------------------------
WARNING:  Cannot find root file system!
--------------------------------------
 
Create symlink /dev/root and then exit this shell to continue the boot sequence.
 
bash-3.2#
 
Any thoughts?  Something obvious I am missing?
 
Thanks,
Todd

--- On Mon, 6/30/08, Jeremy Katz <katzj at redhat.com> wrote:

From: Jeremy Katz <katzj at redhat.com>
Subject: Re: [Fedora-livecd-list] Modifying ISO to include per-user files
To: todd655495 at yahoo.com, fedora-livecd-list at redhat.com
Date: Monday, June 30, 2008, 9:51 AM

On Fri, 2008-06-27 at 09:16 -0700, Todd N wrote:
> After creating a LiveCD ISO image, I'd like to be able to make CDs
> that are essentially identical, but have a small set of unique
> per-user files.  I have tried mounting the ISO, copying its contents
> to a regular directory, making my changes on the Live CD file system
> (not the internal squashfs file system) and recreating the ISO using
> mkisofs.  However, this new ISO (when burned to a CD) refuses to boot.

> Is there a way I can modify the ISO image to include my per-user files on
the 
> /mnt/live file system for each user (and have the resulting ISO be
bootable), 
> rather than running the whole livecd-creator process each time I want a
new CD?

You'll have to run mkisofs with the appropriate options for making the
CD bootable on your arch.   On x86, that's something like 'mkisofs -b
isolinux/isolinux.bin -c isolinux/isolinux.cat -no-emul-boot
-boot-info-table -boot-load-size 4 ....'

Alternately, you can also use the --base-on support to build derivative
images

Jeremy


      
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