diff --git a/jadukor/__init__.py b/jadukor/__init__.py
index 4a1dc43..0396c16 100644
--- a/jadukor/__init__.py
+++ b/jadukor/__init__.py
@@ -1,2 +1,31 @@
 def name():
-        return ('I am A T M Ragib Raihan')
+    return ('I am A T M Ragib Raihan')
+
+
+def rm():
+    pass
+
+
+def ls(file_extension='', tree=False):
+    if file_extension:
+        if type(file_extension) is str:
+            print('Files with {} extention')
+        elif (type(file_extension) is list) or (type(file_extension) is tuple):
+            print('Files with {} extentions'.format(file_extension))
+        else:
+            raise Exception("file_extension parameter should be either a string or a list or a tuple")
+
+def cat():
+    pass
+
+def cd():
+    pass
+
+def touch():
+    pass
+
+def mkdir():
+    pass
+
+# get()
+# soup()
\ No newline at end of file