diff --git a/low-disk-space.sh b/low-disk-space.sh
new file mode 100644
index 0000000..598f5ae
--- /dev/null
+++ b/low-disk-space.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+mingigs=2
+avail=$(df | awk '$6 == "/" && $4 < '$mingigs' * 1024*1024 { print $4/1024/1024 }')
+topicurl=https://ntfy.domain.tld/topic
+token=token
+
+if [ -n "$avail" ]; then
+  curl \
+    -d "Only $avail GB available on the root disk. Better clean that up." \
+    -H "Title: Low disk space alert on $(hostname)" \
+    -H "Priority: high" \
+    -H "Tags: warning,cd" \
+    -H "Authorization: Bearer $token" \
+    $topicurl
+fi
\ No newline at end of file