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nixpkgs nixos-25.11 브랜치의 nixos/doc/manual/ 디렉토리를 sparse clone으로 가져와 ~/obsidian/dev/nixos-manual/에 복사. _index.md에 구조/갱신 방법 정리. 오프라인 참조 + AI 에이전트 컨텍스트용. sandbox-tokyo 같은 NixOS 노드 운영 시 빠른 참조로 사용.
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Necessary system state
Normally — on systems with a persistent rootfs — system services can persist state to
the filesystem without administrator intervention.
However, it is possible and not-uncommon to create impermanent systems, whose
rootfs is either a tmpfs or reset during boot. While NixOS itself supports
this kind of configuration, special care needs to be taken.
nixos-state.section.md
systemd-state.section.md
zfs-state.section.md