Kill Process At Port.sh

# Kills the process running at the port passed into the argument.
# `lsof -i :${1}` gets the processes running at the specified port.
# `awk NR==2` gets the second line which is the first record from lsof.
# `awk '{print $2}')` gets the second column, which is the pid of the process.
# This is evaluated and the result used as the arg for the `kill` command.

kill $(lsof -i :${1} |  awk NR==2 | awk '{print $2}')