Linux get port usage

Linux how to see ports in use

# 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

How to check list of open ports in linux

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

Linux get port usage

# Linux (tested on Kali & Ubuntu)
sudo ss -tulpn | grep LISTEN

Used port linux

# Linux
ss -ltn

# windows
netstat -a -p -n tcp | findstr LISTENING

# SOURCE 
https://solace.community/discussion/26/how-to-find-a-free-tcp-port-for-testing-pubsub-with-docker

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