Hi Pat

Thanks for the reply



I make a copy of the files from the SL-7.2-DVD-x86_64-2016-01-26.iso in a directory.

I delete the packages I don't want.

I copy our application software and kickstart file into the directory.

I modify isolinux/isolinux.cfg to use the kickstart file.

I use mkisofs to create the new ISO



mkisofs -U -J -R -v -T -V PCS -o ../R20.001.iso -b isolinux/isolinux.bin  -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table .



I burn a DVD from the new ISO which I can boot from and do the install.



When I use dd to create a USB key from the ISO and try to boot from USB key, it does not boot.



I have tried adding the "-eltorito-alt-boot -e images/efiboot.img -no-emul-boot" options to the mkisofs command with no success.



Bill 



-----Original Message-----

From: Pat Riehecky [mailto:[log in to unmask]] 

Sent: Thursday, May 24, 2018 1:35 PM

To: EXT-Askew, R W <[log in to unmask]>; [log in to unmask]

Subject: Re: [SCIENTIFIC-LINUX-USERS] Create bootable ISO that can be copied to a USB key



Hello,



Are you creating the custom iso with pungi or a different tool?



Pat



On 05/24/2018 01:17 PM, Bill wrote:

> I am creating a custom installation ISO using kickstart.  This install ISO is based on SL 7.2.

>

> When I burn a DVD from this ISO I can boot from the DVD and the install menu come up as expected.

>

> When I use dd to copy the ISO to a USB key and try to boot from the USB key the install menu does not appear and the system boots from the hard drive.

>

> I tried using dd to copy the SL7.2 ISO to a USB key.  When I try to boot from this USB key the install menu comes up as expected.

>

> What files on the SL7.2 have to do with booting from the USB key?

>

> Is there a mkisofs option I should be using to make booting USB key work?



-- 

Pat Riehecky



Fermi National Accelerator Laboratory

www.fnal.gov

www.scientificlinux.org