nixos

Steps to reproduce:

1. add nix.settings.experimental-features = [ "nix-command" "flakes" ]; to ~/.config/nix/nix.conf

2. execute nixos-rebuild switch

3. execute nix flake init

4. config flake.nix - add git, wget, nixops, etc..

5. execute nix develop

6. add the Prometheus, Prometheus Node Exporter and Grafana settings - /etc/nixos/configuration.nix

7. mkdir /etc/grafana-dashboards

8. chmod 777 /etc/grafana-dashboards

9. mv cpu_memory_disk.json to /etc/grafana-dashboards

10. execute nixos-rebuild switch

11. to build the VM execute nixos-rebuild build-vm --flake .#test

12. to start the VM execute result/bin/run-nixos-vm