diff --git a/scripts/virtual.sh b/scripts/virtual.sh
index 344313a..322ffda 100755
--- a/scripts/virtual.sh
+++ b/scripts/virtual.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash 
 ##########################################################################
 # where am I ?
 SCRIPTPATH="$(cd "$(dirname "$0")" ; pwd -P)"
@@ -31,6 +31,14 @@ fi
 
 pushd "$DYNAMICPATH" > /dev/null
 
+# don't update if the line already exists
+grep -Fx "$line" virtual.js > /dev/null 2>&1 
+if [ $? -eq 0 ]
+then
+    echo "DNS: Already exists, no change"
+    exit 0
+fi
+
 # remove any existing lines
 sed -i -e "/^    \[ '$name',/d" virtual.js