Would anyone here on the list have some experience with either of these products? I've been trying to get either installed on a couple of different pieces of hardware all with no success.

Ubuntu Appliance - downloaded the Adguard appliance image and used the RPI imager tool to transfer the image to a flash drive. My 3b+ will boot every other OS from flash, but not the Adguard appliance image.

Ubuntu Core - download and followed the instructions to put Core onto my 3b+. Still would not boot. Tried their procedure using the amd64 image first on an HP 800 Elitedesk G1 DM. After booting into Ubuntu desktop and using the DD command to transfer the Core image directly to /dev/sda and rebooting all that i get is the error message that Canonical says i should get, the usual boot sequence from Linux. But then it gets to emergency-restart.service and then it reboots. Same cycle continued for over 10 minutes, never got any sort of setup prompt as outlined in their documentation. Tried the same process on a G2, but the outcome was exactly the same.

I've spent a fair amount of time looking for clues as to why or what I may have missed but Google has not found anything relevant. Hoping someone here in the community might have some insight.

Steve