OK, getting a bit further here now, but its still not working

I type

cd /home/pi/RetroPie/roms/ports

hit return

and I’m presented with
pi@retropie ~/RetroPie/roms/ports $

I then type
sudo chown pi:pi Kodi.sh

With a capital K on Kodi, hit return

And all that comes up is
pi@retropie ~/RetroPie/roms/ports $
(Same as above before)

What do I do now?
Having done that I tried rebooting, and running Kodi in Ports still says Permission denied