orangc's Flake Documentation

Useful Nix(OS) Commands

Some utility commands that I've found useful in my time using Nix(OS).

  1. Building a VM from a configuration

nix run .#nixosConfigurations.HOSTNAME.config.system.build.vm

  1. Cleaning up unused imports in Nix code

Prerequisites:

  • Have pkgs.deadnix installed
  • Commit all changes before running the command in case of accidents

deadnix -eq **/*.nix

  1. What depends on a package?

`nix why-depends /run/current-system nixpkgs#package-name'

  1. Only update a specific flake input

nix flake update --update-input <input-name>

  1. Cleaning up unused containers (usually used after disabling a server module that utilises oci-containers)

sudo podman system prune --all --volumes

  1. To quickly open a port in the firewall:

sudo iptables -I INPUT -p tcp --dport 1234 -j ACCEPT

And to close it again:

sudo iptables -D INPUT -p tcp --dport 1234 -j ACCEPT.