Verifique si el servicio se ejecuta a un puerto en Linux
sudo lsof -i -P -n | grep LISTEN
Unusual Unicorn
sudo lsof -i -P -n | grep LISTENone of those:
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo ss -tulpn | grep LISTEN
sudo lsof -i:22 ## see a specific port such as 22 ##
sudo nmap -sTU -O IP-address-Here