https://code.mendhak.com/run-stable-diffusion-on-ubuntu/
I use this on my Ubuntu 18 machine, works nicely on a GPU with 8GB VRAM.
As usual, some python dependency nonsense to sort out even with Anaconda, but pretty quick and easy to get up and running.
https://notes.datagenerator.eu/#Stable%20Diffusion%20install...