Kill Ghost Ruby Server

When I upgraded to rails 5, my development server continually got left running in the background, even though I had no dev servers running. THIS WOULD BE A TIME WHEN SOMEONE WHO WAS A BEGINNER WOULD HAVE NO IDEA HOW TO EVEN GOOGLE THIS.

List all processes

$ lsof -wni tcp:3000

COMMAND   PID       USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
ruby    27268 codeForLife  38u  IPv4 0x7123456665423a01      0t0  TCP 127.0.0.1:hbci (LISTEN)

Kill the process

$ kill -9 27268

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