His eyes seem a bit bleary, but he seems to be enjoying whatever it is that he is doing. Looking closer, you can see that the operating system is obviously Linux, as he swaps virtual consoles at the speed of light. Okay, put the binoculars down. They are both amateur radio operators. And amateurs have been migrating to Linux in remarkable numbers.
Amateurs have a wide variety of radio-related ways to enjoy their hobby.
There is the traditional Morse code, shortwave, as well as local voice communications. In addition, among others, there are satellite communications, participation with the space program, and something called packet radio. These are addresses of amateur radio operators, using packet radio. Anything you can do over Ethernet can be done over packet. Packet operators and programmers have been highly involved in many Internet RFCs as they have found ways around the problems encountered in using radio in this manner.