How to close a process and release the ports it occupies?

Question

System administration

There is node.js listening on a port. When the process is closed (killall *.js), the port remains to be listening. How to release it along with the closing of the process?
Is there any way to restart the node.js process without closing and releasing the port?

Answer 1

www.thegeekstuff.com/2012/08/lsof-command-examples
lsof -i:8000
www.cyberciti.biz/faq/unix-kill-command-examples
kill -15 `lsof -t -i:8000`
kill -9 `lsof -t -i:8000`