dev: NixOS 25.11 매뉴얼 로컬 사본 추가

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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kappa
2026-04-08 16:15:46 +09:00
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# Secure Shell Access {#sec-ssh}
Secure shell (SSH) access to your machine can be enabled by setting:
```nix
{ services.openssh.enable = true; }
```
By default, root logins using a password are disallowed. They can be
disabled entirely by setting
[](#opt-services.openssh.settings.PermitRootLogin) to `"no"`.
You can declaratively specify authorised public keys for a user
as follows:
```nix
{
users.users.alice.openssh.authorizedKeys.keys = [ "ssh-ed25519 AAAAB3NzaC1kc3MAAACBAPIkGWVEt4..." ];
}
```