lsof -i | grep :3002
ss -nlp | grep 3002
tcp LISTEN 0 128 *:3002 : users:(("python",pid=4861,fd=4),("python",pid=4861,fd=3),("python",pid=4858,fd=3))
tcp LISTEN 0 128 *:3002 : users:(("python",pid=4861,fd=4),("python",pid=4861,fd=3),("python",pid=4858,fd=3))