diff --git a/modules/home-manager/scripts/common/bin/nf b/modules/home-manager/scripts/common/bin/nf
index 9eaef3f..bd14ef3 100755
--- a/modules/home-manager/scripts/common/bin/nf
+++ b/modules/home-manager/scripts/common/bin/nf
@@ -1,5 +1,6 @@
 #!/usr/bin/env sh
 
+umask 0077
 SUBDIR="${2:-./}"
 mkdir -p "$NOTES_PATH/$SUBDIR"
 cd "$NOTES_PATH/$SUBDIR" || exit 1
diff --git a/modules/home-manager/scripts/common/bin/t b/modules/home-manager/scripts/common/bin/t
new file mode 100755
index 0000000..e4fe30f
--- /dev/null
+++ b/modules/home-manager/scripts/common/bin/t
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+N todo
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
index d30b015..a624257 100644
--- a/modules/nixos/default.nix
+++ b/modules/nixos/default.nix
@@ -400,6 +400,7 @@
 
   troubleshooting-tools = {pkgs, ...}: {
     environment.systemPackages = with pkgs; [
+      iftop
       bottom
       btop
       dnsutils
diff --git a/nixos/router.nix b/nixos/router.nix
index 447c9d4..3dca964 100644
--- a/nixos/router.nix
+++ b/nixos/router.nix
@@ -96,6 +96,10 @@ in {
     }
   ];
 
+  environment.systemPackages = with pkgs; [
+    iftop
+  ];
+
   boot.kernel.sysctl =
     sysctl-entries
     // {