diff --git a/bin/check-port b/bin/check-port
new file mode 100755
index 0000000..5601c5f
--- /dev/null
+++ b/bin/check-port
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+if [[ $1 = t ]] || [[ $1 = tcp ]] || \
+	[[ $1 = T ]] || [[ $1 = TCP ]]; then
+	echo "TCP is the default. You don't need to specify it."
+	exit 1
+fi
+
+if [[ $1 = u ]] || [[ $1 = udp ]] || \
+	[[ $1 = U ]] || [[ $1 = UDP ]]; then
+	shift
+	set -x
+	sudo nmap -sU $1 -p $2
+else
+	set -x
+	nmap $1 -p $2
+fi
diff --git a/bin/dns b/bin/dns
new file mode 100755
index 0000000..9d7465f
--- /dev/null
+++ b/bin/dns
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+getent hosts $*
diff --git a/bin/nsync b/bin/nsync
index 9dd82d0..9747f08 100755
--- a/bin/nsync
+++ b/bin/nsync
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 
+# TODO: warn on merge conflicts?
 cd "${NOTES_PATH}" || exit
 git add -A
 git commit -m Updates