nixos-module/defaults: install bmon

nix/nixos-module/defaults.nix

@@ -22,8 +22,8 @@
 
   environment.systemPackages = with pkgs; [
     vim screen git wget psmisc
-    tcpdump iputils bridge-utils mtr traceroute
-    dhcpcd ethtool
+    tcpdump iputils mtr traceroute bmon
+    bridge-utils dhcpcd ethtool
   ];
 
   networking.hostName = hostName;