this post was submitted on 07 Jul 2025
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Not mocking: can you share any good guides to practical immutable systems?
What I observed of Ubuntu Core made a strong "not ready for prime time, and even if it was I don't want it" impression on me.
Ubuntu Core, based on Snaps, is very much not ready for prime time IMO. It's kind of a mess outside of server use.
Look instead at Fedora Silverblue, Vanilla OS, and for the bleeding edge of immutable systems, GNOME OS.
KDE is about to launch their analogue to GNOME OS relatively shortly, named "Project Banana". These two are not exactly distros as they do not distribute the kernel, they are simply platforms that layer a bunch of images together to create a stable, reproducible system. There's also OpenSuSE Aeon, but I don't like its style of immutability as it's immutable by rootfs lock-out rather than immutable by image.
As for advice, learn how to use Distrobox / Toolbx containers. If you're a developer, this is where you will be working.
Immutable Linux is still young, and a lot of software isn't written with it in mind, so expect some growing pains.
Thanks. In the past I have worked in Slackware, and even had Gentoo on my home system for a couple of years, but otherwise I've been fully saturated in Debian and its children - so that's my "comfort zone." I used to like KDE, but drifted away from it when I got a 4K screen notebook and KDE hadn't figured out resolution scaling yet, while Ubuntu/Unity had. I never quite warmed up to GNOME, but definitely have done my time with it. XFCE has matured enough for me to daily drive it without too much pain now, and I love the ways it can be de-featured (don't want a launcher bar? Don't run it, nothing else breaks.)
Server-side, I have been filling my Raspberry Pis with Docker containers for a while now... it's not completely alien, but I do kind of tend to "set it and forget it" when it comes to container deployments.
I'm on silverblue, well, bluefin, specifically.
So far so happy 🤷♂️