Trying to link up laptop to desktop using KRDC

As the subject header says, I’m trying to link up two computers.
Desktop is Kubuntu 14.04 and Laptop is Kubuntu 16.04.
How do I connect one to the other. I have done some ‘Googling’ and not got far as the stuff I find talks about clicking a ‘configure’ button and then instructions after it, but I can’t see anything like it, the instructions are all out of date.
Here are the sites I’ve been on…

Link how ? … what are you trying to achieve ?

remote desktop, or just shared folders ?

Both really, so I can attend either one from the other and play video/edit files from the other.