@greichelt said in PXE Boot - File not found:
dnsmasq is undionly,kpxe.0
You need to update dnsmasq to version 2.75 or later. Most modern linux OS already are past this version wit dnsmasq. I have a tutorial on compiling a supported version of dnsmasq if you need it. But my suspicion is that you have an old version of a linux OS that will cause you pain in the future.