The original post: /r/pihole by /u/impreza77 on 2025-02-22 14:09:19.

So I’ve got two piholes running in parallel for the last 4 years or so. And I see the error message (the unsupported OS message) when I try “pi-hole -up”. I assume I have whatever version of Raspbian was current from that time and it’s no longer supported?

I’ve poked around here a bit the last couple days and I’m unclear on whether I need to rebuild these things from scratch or if I can somehow upgrade the base OS in-place? Is that possible without too much trouble?

Thanks very much in advance!