diff --git a/intro/modules/ROOT/pages/exer.adoc b/intro/modules/ROOT/pages/exer.adoc
index 6a532b3..cc9f3c3 100644
--- a/intro/modules/ROOT/pages/exer.adoc
+++ b/intro/modules/ROOT/pages/exer.adoc
@@ -17,6 +17,17 @@ cd /project/courses/fluentd
 * Find All TCP Ports connections
 ** save it
 
+
+NOTE:  try to find the differences between them!
+
+CAUTION:  try to find the differences between them!
+
+WARNING:  try to find the differences between them!
+
+IMPORTANT:  try to find the differences between them!
+
+
+
 == SSH password
 
 [source,bash]