bash function to find a

portfinder.sh

# Find what port a program is using
function portfinder() {
  # Find out what port a program is using.

  # First and only argument is the process name
  # used to grep output of ps command

  # Usage: portfinder name_of_process
  # Example output:
  # node      87825 user   35u  IPv4 0xaffd45cf13a62c85      0t0  TCP *:62883 (LISTEN)

  # first grep searches for first arg passed to portfinder, $1
  # second grep filters out the line containing the first grep
  # awk grabs only the field containing the PID
  local PID=$(ps aux | grep "$1" | grep -v grep | awk '{print $2}')

  # lsof lists files/processes with corresponding open ports, grep for the PID
  lsof -nP -iTCP -sTCP:LISTEN | grep "$PID"
}