I want to install and run Ubuntu MATE from a USB flash drive without a Micro SD card inserted. I can already do this with Raspbian.
I started off by writing the Ubuntu MATE image to the flash drive using Etcher, inserted the flash drive in the Pi and it does not boot.
I then edited
cmdline.txt and changed
/boot/. Back in the Pi, still nothing happened.
I then copied the latest
bootcode.bin on the flash drive, and tried again. This time the green LED came on and the rainbow screen is displayed. After a while, the green LED flashes 7 times (
kernel.img not found)., and then nothing further.
What else must I do to get this working?