nixos install script from Bosnia Kranzes#2709

#!/bin/sh
sudo -s

parted /dev/vda -- mklabel msdos
parted /dev/vda -- mkpart primary 1MiB -2GiB
parted /dev/vda -- mkpart primary linux-swap -2GiB 100%

mkfs.xfs -L nixos /dev/vda1
mkswap -L swap /dev/vda2
swapon /dev/vda2

mount /dev/disk/by-label/nixos /mnt

nix-channel --add https://nixos.org/channels/nixos-21.11 nixos
nix-channel --update

# generate NixOS config
nixos-generate-config --root /mnt
echo "System configuration.nix:"
tee /mnt/etc/nixos/configuration.nix << EOF
{ config, pkgs, ... }:

{
  imports =
    [
      ./hardware-configuration.nix
    ];

  environment.systemPackages = with pkgs; [
    htop
  ];

  boot.loader.grub.enable = true;
  boot.loader.grub.device = "/dev/vda";

  # Enable the OpenSSH daemon.
  services.openssh = {
    enable = true;
    passwordAuthentication = false;
    challengeResponseAuthentication = false;
    permitRootLogin = "no";
  };

  users.users.kranzes = {
    isNormalUser = true;
    initialPassword = "ChangeMeVultr";
    extraGroups = [ "wheel" ];
    openssh.authorizedKeys.keys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOIxgHstqeTdLimsLRe+cdqv6Sgt/dILCrUqQz6Gtxwb kranzes@pongo" ];
  };

  nix.package = pkgs.nixUnstable;
  nix.extraOptions = "experimental-features = nix-command flakes";

  programs.vim.defaultEditor = true;

  system.stateVersion = "21.11";
}
EOF

nixos-install --no-root-passwd

echo "Done. Now reboot via \"Remove ISO\" on the Vultr web UI."