4. make sure your folder structure should look alike /var/lib/knox/data-2.5.3.0-37/services/hdfsui/2.7.0 and should have rewrite.xml and service.xml files
5. change the owner/Group permissions to Knox for /var/lib/knox/data-2.5.3.0-37/services/hdfsui/ and subdirectory
6. Go to Knox configurations Modify "Advanced topology" with below service tag