Verifique se o serviço está sendo executado em uma porta no 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
$ lsof -i :8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 10165 mkyong 52u IPv6 191544 0t0 TCP *:http-alt (LISTEN)