Curious, John decided to investigate further. He opened a new terminal window and typed netstat -tlnp | grep 11501 . The output showed that port 11501 was indeed free, but it also showed that there was a process listening on that port, waiting for incoming connections.
And so, the legend of localhost:11501 free lived on, a reminder to developers everywhere that sometimes, the most unexpected tools can be the most valuable of all.
The next morning, John woke up feeling inspired. He opened his terminal window and typed localhost:11501 free . The message still appeared, but this time, he knew what it meant. He knew that he had access to a powerful tool, one that would help him become a better developer.
John's eyes widened. How did the server know his name? He typed Who are you? and hit enter.