#clone the repo git clone https://github.com/ipxe/ipxe.git
kernel: rhcos--live-kernel-
initramfs: rhcos--live-initramfs..img
rootfs: rhcos--live-rootfs..img
example:
https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/4.6/latest/
IPXE: deps https://ipxe.org/download
#create iso file for use
make bin/ipxe.iso EMBED=./coreos-amd64-installer.ipxe
#create bootable iso for vmware
make bin/8086100f.mrom bin/808610d3.mrom bin/10222000.rom bin/15ad07b0.rom bin/ipxe.iso EMBED=./coreos-amd64-installer.ipxe
#create usb bootable
make bin/ipxe.usb EMBED=./coreos-amd64-installer.ipxe
#transfer the usb image to your usbdisk
#Note: XX is your usbdevice id.
dd if=bin/ipxe.usb of=/dev/sdXX