nixos-configuration/nix-os/core.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running 'nixos-help').

{ config, pkgs, lib, ... }:

{
  # kernel
  boot.kernelPackages = pkgs.linuxPackages_latest;

  # Enable networking
  networking.networkmanager.enable = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    wget
    git
    ffmpeg
    yt-dlp
    htop
    btop
    fastfetch
    ranger
    smartmontools
    ddrescue
  ];

  programs.git.config = {
    init.defaultBranch = "main";
    merge.conflictstyle = "diff3";
    rerere.enabled = true;
  };

  # Enable fail2ban because of the OpenSSH server
  services.fail2ban = {
    enable = true;
    maxretry = 10;
    bantime = "7d";
  };

  # Enable the OpenSSH daemon.
  services.openssh = {
    enable = true;
    ports = [
      22
      8022
    ];
  };
}