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# Necessary system state {#ch-system-state}
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Normally — on systems with a persistent `rootfs` — system services can persist state to
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the filesystem without administrator intervention.
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However, it is possible and not-uncommon to create [impermanent systems], whose
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`rootfs` is either a `tmpfs` or reset during boot. While NixOS itself supports
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this kind of configuration, special care needs to be taken.
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2024-04-01 16:26:00 +02:00
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[impermanent systems]: https://wiki.nixos.org/wiki/Impermanence
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```{=include=} sections
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nixos-state.section.md
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systemd-state.section.md
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zfs-state.section.md
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```
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