[CentOS] USB ISO for CentOS 8

Fri Oct 4 15:30:18 UTC 2019
Jerry Geis <jerry.geis at gmail.com>

I did the dd of the ISO to a 16G USB device.

the second partition is FAT so I can edit it - I want to make a custom menu
I edited the grub.cfg - but that did not work - my menu option does not

Then I think I need to change BOOT.cfg and generate the grub.cfg - but I
dont know
in this case how to generate for the USB device.

What command do I use for that ?