xmod Creating an xmod command similar to chmod Group members: Adriano Soares (up201904873@fe.up.pt) Diogo Maia (up201904974@fe.up.pt) Francisco Cerqueira (up201905337@fe.up.pt) Pedro Pereira (up201905508@fe.up.pt) Vasco Alves (up201808031@fe.up.pt)