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At https://nixos.org/ I can view the recent releases of NixOS.

Is there a command I can run to see which version is on my machine?

2 Answers 2

7

From the Nixos manual:

nixos-version
1
$ nix-info -m
 - system: `"x86_64-linux"`
 - host os: `Linux 5.10.79, NixOS, 21.05.4116.46251a79f75 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.16`
 - channels(root): `"nixos-21.05.4116.46251a79f75"`
 - channels(roman): `""`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`
  • host os shows what version system is on
  • channels(root) shows what is the updated channel version
  • channels(roman) shows that user roman is not on a different channel than host

enter image description here

Source https://dopp.sk/posts/NixOS_channels/

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