Added nixos configs

OLD CONFIGS/nix_new/modules/nixos/core/fonts.nix

@@ -0,0 +1,33 @@
+# Baseline fonts for the system (NixOS 25.05+ / 26.05 compatible)
+#
+# Note:
+# - `noto-fonts-cjk` was deprecated/split into:
+#   - noto-fonts-cjk-sans
+#   - noto-fonts-cjk-serif
+
+{ config, lib, pkgs, ... }:
+
+let
+  moduleName = "nixos-fonts";
+
+  has = name: builtins.hasAttr name pkgs;
+in
+{
+  fonts = {
+    # Keep your existing setup idea: install baseline font packages system-wide
+    packages =
+      (with pkgs; [
+        noto-fonts
+        noto-fonts-color-emoji
+      ])
+      # CJK split (new)
+      ++ lib.optionals (has "noto-fonts-cjk-sans") [ pkgs.noto-fonts-cjk-sans ]
+      ++ lib.optionals (has "noto-fonts-cjk-serif") [ pkgs.noto-fonts-cjk-serif ];
+
+    # Optional: common baseline toggle (leave as-is if you already set it elsewhere)
+    # enableDefaultPackages = lib.mkDefault true;
+  };
+
+  # Breadcrumb for debugging
+  environment.etc."nixlog/loaded.${moduleName}".text = "loaded\n";
+}

OLD CONFIGS/nix_new/modules/nixos/core/locale.nix

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+{ config, pkgs, lib, ... }:
+
+let
+  moduleName = "nixos-locale";
+in
+{
+  time.timeZone = "Europe/Amsterdam";
+  i18n.defaultLocale = "en_US.UTF-8";
+  environment.etc."nixlog/loaded.${moduleName}".text = "loaded\n";
+}

OLD CONFIGS/nix_new/modules/nixos/core/nix.nix

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+# ~/nixos/modules/nixos/core/nix.nix
+#
+# Purpose:
+# - Shared baseline Nix configuration for ALL hosts
+# - Flakes enabled
+# - Reasonable garbage collection defaults
+# - Allow unfree packages (needed for Brave/Vivaldi/Opera etc.)
+
+{ config, lib, pkgs, ... }:
+
+let
+  moduleName = "nixos-core-nix";
+in
+{
+  # Required for Brave/Vivaldi/Opera and other proprietary software.
+  nixpkgs.config.allowUnfree = true;
+
+  nix = {
+    # Enable flakes + nix-command everywhere (baseline)
+    settings.experimental-features = [ "nix-command" "flakes" ];
+
+    # Why:
+    # - Keeps the store from growing forever
+    # - Still allows rollbacks for a while
+    settings.auto-optimise-store = true;
+
+    # Reasonable default: allow Nix to use all CPU cores
+    settings.max-jobs = lib.mkDefault "auto";
+  };
+
+  # Automatic cleanup of old generations and store garbage
+  #
+  # Why:
+  # - On multi-machine setups, store growth is one of the main annoyances.
+  # - This is safe and keeps machines tidy.
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 14d";
+  };
+
+  # Keep a limited number of boot entries / system generations
+  #
+  # Why:
+  # - Still safe for rollbacks
+  # - Prevents /boot from filling up on some setups
+  boot.loader.systemd-boot.configurationLimit = lib.mkDefault 10;
+
+  nix.settings.download-buffer-size = 67108864;
+
+
+  # Optional: breadcrumb for debugging module load order
+  environment.etc."nixlog/loaded.${moduleName}".text = "loaded\n";
+}

OLD CONFIGS/nix_new/modules/nixos/core/security.nix

@@ -0,0 +1,39 @@
+# ~/nixos/modules/nixos/core/security.nix
+#
+# Purpose:
+# - Security primitives that are shared across all hosts:
+#   - polkit (desktop authorization framework)
+#   - sudo baseline (privilege escalation)
+#
+# Keep this file conservative: it should not introduce host-specific behavior.
+
+{ config, lib, pkgs, ... }:
+
+{
+  # Polkit is commonly needed on desktop systems (including Wayland compositors)
+  # for privileged actions (network, power, mounting, etc.).
+  security.polkit.enable = true;
+
+  # Sudo baseline.
+  security.sudo = {
+    enable = true;
+
+    # Hardening: only wheel members can *execute* sudo at all.
+    # This reduces exposure if a non-wheel user exists.
+    execWheelOnly = true;
+
+    # Keep password requirement (safer baseline).
+    # If you want passwordless sudo for wheel, override elsewhere.
+    wheelNeedsPassword = true;
+
+    # Optional: sane defaults; adjust as you like.
+    extraConfig = ''
+      Defaults timestamp_timeout=5
+      Defaults pwfeedback
+    '';
+  };
+
+  # If you want to fully manage users declaratively (stronger security posture),
+  # you can enable this — but it can surprise you if you expect to use `passwd`.
+  # users.mutableUsers = false;
+}

OLD CONFIGS/nix_new/modules/nixos/core/users.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, lib, ... }:
+
+let
+  username = "henrov";
+  initialpwd= "Welkom01!";
+  moduleName = "nixos-users";
+in
+{
+  users.users.${username} = {
+    #initialPassword = initialpwd;
+    isNormalUser = true;
+
+    # Add your user to groups needed for admin + network + typical desktop input/video access
+    extraGroups = [
+      "wheel"
+      "networkmanager"
+      "video"
+      "input"
+      "audio"
+    ];
+
+    # If you want zsh explicitly per-user (instead of defaultUserShell):
+    # shell = pkgs.zsh;
+  };
+
+  # If you want a simple "proof this module was applied" marker at the *system* level:
+  # (This creates /etc/nixos-users.loaded)
+  environment.etc."nixos-users.loaded".text = "loaded\n";
+}