Check used ports on Linux


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

Revision #2
Created 9 February 2023 20:53:42 by Angelos
Updated 10 February 2023 23:15:02 by Angelos