Connect your USB hub, keyboard, mouse and monitor to the NUC
Insert the first USB flash drive, containing Ubuntu Desktop 20.04 LTS
Start the NUC and push F10 to enter the boot menu
Select the USB flash drive as a boot option
Select Try Ubuntu without installing
Once the Ubuntu session has started, insert the second USB flash drive containing the appliance image file
Open a terminal and use the following command to find out the target disk device to install the appliance to:
```
sudo fdisk -l
```

Run the following command, where <disk label> is the label of the second USB flash drive:

xzcat /media/ubuntu/<disk label>/dawson-uc18-m7-20190122-10.img.xz | sudo dd of=/dev/<target disk device> bs=32M status=progress; sync

Reboot the system and remove the flash drives when prompted. It will then boot from the internal memory where your appliance image has been flashed