NixOS: Difference between revisions
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{{Expansion|reason=It needs to be an easy introduction, because its one of the first articles new users read here. Thats why it needs to be simplified a bit and more complex topics should be moved to other articles.}} | {{Expansion|reason=It needs to be an easy introduction, because its one of the first articles new users read here. Thats why it needs to be simplified a bit and more complex topics should be moved to other articles.}} | ||
[https://nixos.org/ NixOS] is a Linux distribution based on the [[Special:MyLanguage/Nix|Nix]] package manager and build system. It supports [https://en.wikipedia.org/wiki/Declarative_programming declarative] system-wide [https://en.wikipedia.org/wiki/Configuration_management configuration management] as well as [https://en.wikipedia.org/wiki/Atomicity_(database_systems) atomic] upgrades and rollbacks, although it can additionally support [https://en.wikipedia.org/wiki/Imperative_programming imperative] package and user management. In NixOS, all components of the distribution — including the [https://en.wikipedia.org/wiki/Linux_kernel kernel], installed [https://en.wikipedia.org/wiki/Package_manager packages] and system configuration files — are built by [[Special:MyLanguage/Nix|Nix]] from [[Wikipedia:Pure function|pure functions]] called [[Special:MyLanguage/Nix Expression Language|Nix expressions]]. | [https://nixos.org/ NixOS] is a Linux distribution based on the [[Special:MyLanguage/Nix|Nix]] package manager and build system. It supports [https://en.wikipedia.org/wiki/Declarative_programming declarative] system-wide [https://en.wikipedia.org/wiki/Configuration_management configuration management] as well as [https://en.wikipedia.org/wiki/Atomicity_(database_systems) atomic] upgrades and rollbacks, although it can additionally support [https://en.wikipedia.org/wiki/Imperative_programming imperative] package and user management. In NixOS, all components of the distribution — including the [https://en.wikipedia.org/wiki/Linux_kernel kernel], installed [https://en.wikipedia.org/wiki/Package_manager packages] and system configuration files — are built by [[Special:MyLanguage/Nix|Nix]] from [[Wikipedia:Pure function|pure functions]] called [[Special:MyLanguage/Nix Expression Language|Nix expressions]]. | ||
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NixOS also places entries for previous generations in the bootloader menu, so as a last resort you can always revert to a previous configuration by rebooting. To set the currently booted generation as the default run | NixOS also places entries for previous generations in the bootloader menu, so as a last resort you can always revert to a previous configuration by rebooting. To set the currently booted generation as the default run | ||
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Because NixOS keeps previous generations of system state available in case rollback is desired, old package versions aren't deleted from your system immediately after an update. You can delete old generations manually: | Because NixOS keeps previous generations of system state available in case rollback is desired, old package versions aren't deleted from your system immediately after an update. You can delete old generations manually: | ||