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{ config, pkgs, ... }:
 
{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];
 
  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
 
  # setting sysctl.conf
  boot.kernel.sysctl = {
        "vm.dirty_ratio" = 6;
        "net.ipv4.ip_forward" = 1;
  };
 
  networking.hostName = "shy-nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
 
  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
 
  # Enable networking
  networking.networkmanager.enable = true;
 
  # Set your time zone.
  time.timeZone = "Asia/Shanghai";
 
  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";
 
  i18n.extraLocaleSettings = {
    LC_ADDRESS = "zh_CN.UTF-8";
    LC_IDENTIFICATION = "zh_CN.UTF-8";
    LC_MEASUREMENT = "zh_CN.UTF-8";
    LC_MONETARY = "zh_CN.UTF-8";
    LC_NAME = "zh_CN.UTF-8";
    LC_NUMERIC = "zh_CN.UTF-8";
    LC_PAPER = "zh_CN.UTF-8";
    LC_TELEPHONE = "zh_CN.UTF-8";
    LC_TIME = "zh_CN.UTF-8";
  };
 
  # Configure keymap in X11
  services.xserver = {
    layout = "us";
    xkbVariant = "";
  };
 
  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.shy = {
    isNormalUser = true;
    description = "shy";
    extraGroups = [ "networkmanager" "wheel" ];
    packages = with pkgs; [];
  };
 
  # Enable automatic login for the user.
  services.getty.autologinUser = "shy";
 
  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;
 
 
  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    wget curl lldpd vim bc netcat bash-completion
      (with import <nixpkgs> {};
        vim_configurable.customize {
          name = "vim";
          vimrcConfig.customRC = ''
set st=2 sts=2 sw=2
syntax on
'';
        }
      )
  ];
 
  # Enable the OpenSSH daemon.
  services.openssh.enable = true;
  services.openssh.permitRootLogin = "no";
 
  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
 
  # Or disable the firewall altogether.
  networking.firewall.enable = false;
 
  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "23.05"; # Did you read the comment?
 
  # try it ...
  services.nginx = {
    enable = true;
    virtualHosts = {
      "mydomain.com" = {
        enableACME = true;
        locations."/" = {
          extraConfig = ''; # Config goes here
        };
      };
    };
  }
 
 
}