Overview of the NixOS Linux distribution: Difference between revisions
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==== Channels ==== | ==== Channels ==== | ||
NixOS, as well as Nix packages and NixOS modules are distributed through Nix channels: mechanisms for distributing Nix expressions as well as the associated binary caches for them. These channels are what determine which version of NixOS you are using, and they can be broadly categorized into ''stable'' and ''unstable'' channels, and ''large'' and ''small'' channels. Most users will want the stable/large channel, currently <code>nixos-24.05</code>. For more information on channels and how to choose them, see the [[ | NixOS, as well as Nix packages and NixOS modules are distributed through Nix channels: mechanisms for distributing Nix expressions as well as the associated binary caches for them. These channels are what determine which version of NixOS you are using, and they can be broadly categorized into ''stable'' and ''unstable'' channels, and ''large'' and ''small'' channels. Most users will want the stable/large channel, currently <code>nixos-24.05</code>. For more information on channels and how to choose them, see the [[Channel branches]] article. | ||
Like packages installed via <code>nix-env</code>, channels are managed at user-level. NixOS uses the channels set for the <code>root</code> user to update the system-wide configuration; channels set for other users control only the user environment for that user. If you wish to change the channel used by the system-level configuration (<code>/etc/nixos/configuration.nix</code>), ensure you run the correct <code>nix-channel</code> command as root: | Like packages installed via <code>nix-env</code>, channels are managed at user-level. NixOS uses the channels set for the <code>root</code> user to update the system-wide configuration; channels set for other users control only the user environment for that user. If you wish to change the channel used by the system-level configuration (<code>/etc/nixos/configuration.nix</code>), ensure you run the correct <code>nix-channel</code> command as root: | ||
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* [[NixOS modules]], a library for modular [[Overview of the Nix Expression Language#Expressions|Nix expressions]] which powers [[#Declarative Configuration|the declarative configuration of NixOS]]. | * [[NixOS modules]], a library for modular [[Overview of the Nix Expression Language#Expressions|Nix expressions]] which powers [[#Declarative Configuration|the declarative configuration of NixOS]]. | ||
* [[NixOS | * [[NixOS VM tests]], a library for creating reproducible infrastructure tests, based on [[Nixpkgs]], [[NixOS]], QEMU and Perl. | ||
* [https://github.com/ryan4yin/nixos-and-flakes-book NixOS & Flakes Book] (Ryan4yin, 2023) - 🛠️ ❤️ An unofficial NixOS & Flakes book for beginners. | * [https://github.com/ryan4yin/nixos-and-flakes-book NixOS & Flakes Book] (Ryan4yin, 2023) - 🛠️ ❤️ An unofficial NixOS & Flakes book for beginners. | ||