diff --git a/ex01/hello_world.sh b/ex01/hello_world.sh
new file mode 100755
index 0000000..3936fbb
--- /dev/null
+++ b/ex01/hello_world.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+hello_world () {
+	if [ -z "$1" ]
+  		then
+    			echo "Hello, World!"
+		else
+			echo "Hello, $1!"
+	fi
+}
+
+hello_world $@
diff --git a/ex02/ex02.sh b/ex02/ex02.sh
new file mode 100755
index 0000000..8fd7e06
--- /dev/null
+++ b/ex02/ex02.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+search () {
+	for d in $@
+    do
+			ls -R | awk -v var="$d" '$0 ~ var{print $0}'
+    	out=`ls -R | awk -v var="$d" '$0 ~ var{print $0}'`
+			if [ -z "$out" ] 
+				then
+				echo "the searched PATH is unexisting";
+			fi
+	done
+}
+search $@