View the processes listening on ports

Nettools

Install net-tools

sudo yum install net-tools

Check applications and what ports they are listening on

netstat -ltnp
  • -l - Only show listening sockets
  • -t - Display tcp connections
  • -n - Show numerical addresses
  • -p - Show process id and name

LSOF

Install:

sudo apt install lsof

Use lsof:

For example check the port 8200:

lsof -i :8200

Returns:

COMMAND   PID    USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
vault   13459 stephen    5u  IPv4 0xe0d88d9fe57581cf      0t0  TCP localhost:trivnet1 (LISTEN)

Source

Find out process listening on a port