linux ako vidieť porty v používaní
# Any of the following
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 # see a specific port such as 22
sudo nmap -sTU -O IP-address-Here
porty počúvania ubuntu
# To see ports in use
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
pozrite sa, čo je pomocou portu ubuntu
$ sudo lsof -i:22
skontrolujte všetky bežiace porty ubuntu
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
# Source
https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/