diff --git a/step1/jiance.sh b/step1/jiance.sh
index 497d3c2..9276a7f 100644
--- a/step1/jiance.sh
+++ b/step1/jiance.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 sh ./step1/daan.sh
 cat ./step1/daan.sh |grep rm 
 cat ./step1/daan.sh |grep echo 
\ No newline at end of file