Your text and path are not consistent: "Every file and folder on a POSIX system can be expressed as a path. If I have the file penguin.jpg in the photos folder within my home directory, and my username is seth, then the file path can be expressed as /home/seth/Pictures/penguin.jpg."
Your text and path are not consistent: "Every file and folder on a POSIX system can be expressed as a path. If I have the file penguin.jpg in the photos folder within my home directory, and my username is seth, then the file path can be expressed as /home/seth/Pictures/penguin.jpg."
this should be /home/seth/photos/penguin.jpg