diff --git a/HowtoElasticsearch.md b/HowtoElasticsearch.md
index cd51b385..6f96db28 100644
--- a/HowtoElasticsearch.md
+++ b/HowtoElasticsearch.md
@@ -570,6 +570,6 @@ indices=$(curl http://127.0.0.1:9200/_cat/indices/logstash-*?h=i | sort | head -
 
 for index in ${indices}; do
     # echo Delete ${index}
-    curl -XDELETE http://127.0.0.1:9200/${index}
+    curl --silent --fail --show-error -XDELETE http://127.0.0.1:9200/${index} > /dev/null
 done
 ~~~