diff --git a/backup.sh b/backup.sh
index e69de29..7cb7a18 100644
--- a/backup.sh
+++ b/backup.sh
@@ -0,0 +1,6 @@
+#! /bin/bash
+
+if [ $UID -ne 0 ] ; then
+  echo "need root"
+  exit 1
+fi