On Mon, Mar 02, 2026 at 11:47:25PM +0000, Pattled Buquor wrote:
> Does anyone here have some advice/idea/experience on how to do immutable
> systems with OpenBSD?
If you're new to OpenBSD, it would be much better to get some experience with
a 'regular' installation first.
Essentially everything you are asking about is _possible_, but when it
eventually breaks you'll have difficulty fixing it unless you know OpenBSD
inside out.
> Something I found that may be part of a solution is `union_mount`. This
> seems to be like OverlayFS on Linux. The problem is that the feature
> seems to have disapeared from OpenBSD in release 3.8, even if I couldn't
> find any mention of it in the changelogs (I may have missed it).
It was indeed removed from OpenBSD a long time ago. It's still in recent
versions of NetBSD, so if you are curious to see how it works on a BSD system
that would be the easiest way to experiment.
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