How do I transfer images from a Fedora 20 computer to an iPhone?

I have a laptop running Fedora20. I have an iPhone4S. I have installed the software suggested here which allows my laptop to read the iPhone. I connect my phone to the laptop using a USB cable. I can see a bunch of files, including all the images that are on the iPhone. I can transfer images from the iPhone to the laptop. **What I want to do is transfer images from the laptop to the iPhone.** When I copy and paste images I don' get any error message, but the images never appear on the iPhone. **How can I sync these images to the iPhone?** I do not have any other OS available. (Asking here because "AskDifferent", the Apple StackExchange site is hopeless)