One big disadvantage of GUI apps is that you’re mostly limited to whatever the interface lets you do — unless you want to re-code the interface yourself, that is. For instance, how can you use a photo viewer to see all of the photos you put in various places on your disk this past Monday? If you know where the photos are stored and what their names are, you can navigate through your directories in a file browser like Nautilus, clicking on files to view them. But what a pain! Linux users have more choices...