Problem with creating custom live CD

tikit · 02-16-2011, 07:39 AM

I am trying to create a custom Ubuntu live CD according to this guide https://help.ubuntu.com/community/LiveCDCustomization. First of all I wanted to test how mkisofs utility works so I copied the content of the live CD to /tmp/bootcd directory and create an ISO image. I ran the following commands

Code:

sudo rsync -av /media/CDROM/* /tmp/bootcd/
cd /tmp/bootcd 
sudo mkisofs -r -V "Ubuntu9.10" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ../ubuntu-9.10.iso .

If I understand it correctly, the same image as the source one should be created.

When booting the Ubuntu boot menu appears and I choose "Try Ubuntu without installing.." It gets stuck after a while with this message "Unable to find a medium containing a live filesystem"

Do you have any idea where the problem could be?

Thanks in advance

business_kid · 02-17-2011, 03:16 AM

I'd try without the cd to /tmp/bootcd, and where mkisofs has 'some files' in the help, I'd reference /tmp/bootcd/*

Also, k3b handles this stuff very well, if you have that installed.

tikit · 02-18-2011, 01:46 AM

I tried without cd into bootcd directory, but no success.

Code:

sudo mkisofs -r -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o /tmp/ubuntu-9.10.iso ./bootcd

Just for testing purposes I tried to create a bootable CD from SystemRescueCd and SLES11 and it worked. However, for Ubuntu 9.10 and 10.10 it does not. So it seems to be an Ubuntu specific problem.

BTW: I installed k3b, created an ISO but I don't find any option how to make it bootable

Thanks for your help

business_kid · 02-19-2011, 03:41 AM

Quote:

Originally Posted by tikit

BTW: I installed k3b, created an ISO but I don't find any option how to make it bootable

If you have k3b, you don't need the iso. Just add the files, and it will make it bootable IIRC if you want. You can mount the iso as follows:
modprobe loop
mount -o loop -t iso9660 your.iso /somewhere