Academy file upload skill assessment

hello, so im having troubles with getting xxe to work. here is a image of the shell and image source. I wont run the xml. im able to upload and see the image. but i can get it to run to retrieve the stuff. hope some one can help and thank you for your time and help

Got it to work but now how do i file ls or look at the directory. if that makes sense. im want to use something like ls command. hope someone can help/