1 # Necessary system state {#ch-system-state}
3 Normally — on systems with a persistent `rootfs` — system services can persist state to
4 the filesystem without administrator intervention.
6 However, it is possible and not-uncommon to create [impermanent systems], whose
7 `rootfs` is either a `tmpfs` or reset during boot. While NixOS itself supports
8 this kind of configuration, special care needs to be taken.
10 [impermanent systems]: https://wiki.nixos.org/wiki/Impermanence
13 ```{=include=} sections
14 nixos-state.section.md
15 systemd-state.section.md