Spyke

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Plutonium-239 - Arch Linux made unbreakable and lightning fast. Initial in-development release, announced here on Lemmy first.

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To put it in simple terms: when you update your system, you will have two deployments. One deployment stays exactly the same, the copy will be updated. Until you restart you stay on the original. When you restart, the system automatically attempts to boot the updated copy. If it fails, it automatically loads the original again.

That way the updates are atomic in the sense that you either boot into a fully updated system or simply back into the untouched original, nothing in between.

Edit: if you look up how Fedora Silverblue works, it's pretty much the same, just applied to Arch!