Stopping service on specific port

stop_service_on_port.sh

#!/bin/bash
#
#
# PROBLEM:
# ---------------------
# If we run:
#     pkill gunicorn
# We stop all gunicorn services, in this case to start gunicorn we only need to stop the parent
# process associated with the service that attends the port where gunicorn will be executed.
#
# The following script searches for said process (pid), if it exists it kills this process:

stop_unicorn_on_port() {
  pid=$(lsof -w -t -i "TCP:${1}" | head -1)
  if [ -z "${pid}" ]; then
    echo "🦄 no service deamon on port ${1}"
  else
    kill -9 "${pid}"
    echo "🦄 killed service deamon(${pid}) on port ${1}"
  fi
}
# Example/Testing
stop_unicorn_on_port 5000
stop_unicorn_on_port 5001
stop_unicorn_on_port 5002