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Mention multiple configurations option

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ItsDrike 2024-02-21 22:10:52 +01:00
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guides/installation.md
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@ -129,6 +129,18 @@ Yay, you're now using NixOS in flakes mode!
> If you run the `sudo nixos-rebuild switch` command, without the `--flake .` > If you run the `sudo nixos-rebuild switch` command, without the `--flake .`
> it would look for the `flake.nix` file in `/etc/nixos`. > it would look for the `flake.nix` file in `/etc/nixos`.
> [!TIP]
> Notice the `nixosConfigurations` (plural) key in our flake, suggesting that
> it can hold multiple configurations. Indeed, it can! You can use a single
> flake to manage multiple systems.
>
> The name for the configuration just needs to match the hostname of your
> machine, which by default will be `nixos`.
>
> Alternatively, you can also pick which configuration to use manually in the
> rebuild command, like so: `nixos-rebuild --flake .#my-configuration`, which
> would pick a config named `my-configuration`.
You can notice that this also created a `flake.lock` file, containing the exact You can notice that this also created a `flake.lock` file, containing the exact
versions of all of the packages you're using. Let's add this file to git too: versions of all of the packages you're using. Let's add this file to git too:
`git add flake.lock`. `git add flake.lock`.