Add basic new server config

Includes sshd for easy connecting in local virtualized environment.

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1748372346,
+        "lastModified": 1752998173,
-        "narHash": "sha256-7y7NZ6uW0GbT0h4gqfD2xvRuJj5IlPGw32oIc9Twga8=",
+        "narHash": "sha256-ZlYpBp2WOe03UrpjJGz5KTOL/pp7A452hJO/Vc8C4/0=",
         "owner": "AdnanHodzic",
         "repo": "auto-cpufreq",
-        "rev": "becd5b89963fa54fef3566147f3fd2087f8a5842",
+        "rev": "562278377ffa96f3c1af49c7b499df028ce8d8bd",
         "type": "github"
       },
       "original": {
@@ -65,11 +65,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1749154018,
+        "lastModified": 1753592768,
-        "narHash": "sha256-gjN3j7joRvT3a8Zgcylnd4NFsnXeDBumqiu4HmY1RIg=",
+        "narHash": "sha256-oV695RvbAE4+R9pcsT9shmp6zE/+IZe6evHWX63f2Qg=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "7aae0ee71a17b19708b93b3ed448a1a0952bf111",
+        "rev": "fc3add429f21450359369af74c2375cb34a2d204",
         "type": "github"
       },
       "original": {
@@ -87,11 +87,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1746906641,
+        "lastModified": 1752585957,
-        "narHash": "sha256-b6few4tkqN2TWdrZTwWOjsWxA11rle7y9pcc0/ynuoE=",
+        "narHash": "sha256-ogQo/MMNSIM4U4VQMieIrpLhjkgSbev3VR24foJ/h/U=",
         "owner": "~rycee",
         "repo": "lazy-apps",
-        "rev": "0b30a0bf524a661f9657c441d021aaa5724f12ff",
+        "rev": "3c3ce5001e24b6c12496a5920eee28a96f8d49d6",
         "type": "sourcehut"
       },
       "original": {
@@ -102,11 +102,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1749195551,
+        "lastModified": 1754229794,
-        "narHash": "sha256-W5GKQHgunda/OP9sbKENBZhMBDNu2QahoIPwnsF6CeM=",
+        "narHash": "sha256-yOl7REX6O/1mh+tpscJPKgjK6nmXSMOB1xhmDNAMUZM=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "4602f7e1d3f197b3cb540d5accf5669121629628",
+        "rev": "a872d985392ee5b19d8409bfcc3f106de2070070",
         "type": "github"
       },
       "original": {
@@ -118,11 +118,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1749086602,
+        "lastModified": 1754028485,
-        "narHash": "sha256-DJcgJMekoxVesl9kKjfLPix2Nbr42i7cpEHJiTnBUwU=",
+        "narHash": "sha256-IiiXB3BDTi6UqzAZcf2S797hWEPCRZOwyNThJIYhUfk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4792576cb003c994bd7cc1edada3129def20b27d",
+        "rev": "59e69648d345d6e8fef86158c555730fa12af9de",
         "type": "github"
       },
       "original": {

flake.nix

@@ -90,6 +90,18 @@
           ./hosts/backup-raspberrypi
         ];
       };
+
+      server = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          ./hosts/nixos-server-test
+        ];
+      };
     };
   };
 }

hosts/nixos-server-test/default.nix

@@ -0,0 +1,51 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/nix.nix
+      ../../modules/sshd.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+  # Use the GRUB 2 boot loader.
+  boot = {
+    loader.grub = {
+      enable = true;
+      device = "/dev/vda";
+    };
+    tmp.useTmpfs = true;
+  };
+  networking.hostName = "nixos-server"; # Define your hostname.
+  users = {
+    users = {
+      julius = {
+        isNormalUser = true;
+        uid = 1000;
+        extraGroups = [ "wheel" "julius" ];
+      };
+    };
+    groups = {
+      julius = {
+        gid = 1000;
+      };
+    };
+  };
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/nixos-server-test/hardware-configuration.nix

@@ -0,0 +1,31 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/e46c412a-8b6d-41b8-b53c-65d7a8fc39ed";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

modules/sshd.nix

@@ -0,0 +1,13 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  services.openssh = {
+    enable = true;
+    settings = {
+      PasswordAuthentication = false;
+      PermitRootLogin = "no";
+    };
+  };
+}