What Is This:
————–
You Uploaded Shell With With “NoBody” Permission
Let’s Say You Browse To Another Folder Which Is 777 But All Files Are 755 And Belongs To Some User There
To Change Those Files We Do Like This

How To Do It:
—————
Upload Your Own File/Index To That Folder Let’s Say Your Page Called

Evil.php

And The File You Want To Change Is

Index.html

So Execute This:

MV Evil.php Index.html