You should use it on the command line of Linux, and not in SSH (as that addon runs in a docker), sudo and apt are not available in HA OS itself, only in the host (which is linux)
Was beginning to suspect that, what a PITA. Seems a weird decision, I would have thought a container would make an ideal development environment for working on integrations.
If I install Raspberry Pi OS plus docker and do this, will that give me a suitable environment, or do I need to go full monty and start with home assistant core?
I found out the hard way that hassio does not properly support developing integrations. Which type of install should I use?
It seems I cannot use visual studio (doesn’t run on arm - and I wouldn’t particularly want a full blown IDE like that anyway on a small arm machine), so I started on this setup, and it fails as this a very limited environment (no python and no way to install it)
I want to follow some sort of getting started tutorial so I learn what all the parts are and where they live and inter-relate, and the one linked above looks like a good way to start