ubuntu check process on port
sudo lsof -i:22ports in use linux
# To see ports in use
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTENhow 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-Hereused 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-dockerport running linux
sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-65000Copyright © 2021 Codeinu
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