Add Linux tools (under condition)

modules/tools.nix

@@ -33,13 +33,17 @@ let
 in
 lib.mkMerge [
   {
-    environment.systemPackages = with pkgs; [
+    environment.systemPackages =
+      with pkgs;
+      [
         vim
         git
         jq
+        file
 
         # Nix
         nix-output-monitor # nix build -> nom build
+        nixfmt-rfc-style
 
         # Software debug
         tcpdump
@@ -53,6 +57,25 @@ lib.mkMerge [
         smartmontools # smartctl
         usbutils # lsusb
         pciutils # lspci
+      ]
+      ++ lib.optionals pkgs.stdenv.isLinux [
+        # Software debug
+        iotop
+        dool # dool --time --disk -D /dev/sde,/dev/sdf --top-bio --top-cpu --zfs-arc
+        strace
+        ltrace
+        smem # smem -tkP nginx
+
+        # Hardware info and tunables
+        parted
+        hdparm
+        efivar
+        efibootmgr
+        sg3_utils # sg_unmap
+        lm_sensors # sensors
+        nvme-cli
+        dmidecode
+        ethtool
       ];
   }