I am having a iPhone 4s and a laptop with Ubuntu 16.04. I need to copy music, pptx, pdfs from my laptop to iPhone. I read many posts and answers but none of them help me. Even I tried to install iTunes through PlayOnLinux, but it does not allow to sync files between iphone and laptop. As suggested in a answer at askubuntu I ran
sudo apt-get update
sudo apt-get install gvsf-backends
then it notifies me that I am having the latest one installed. But when I connect iphone to Ubuntu, only I am able to copy the camera photos ( and other pdfs, pptx...) to my computer only, I cannot copy ones from my computer to the iphone. I even tried Banshee but it does not have "devices" tab in the left side. How to sync music, files and videos from Ubuntu 16.04 to iphone 4s?