linux check if a port is open
sudo lsof -i -P -n | grep LISTENcheck if port is available 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-HereCopyright © 2021 Codeinu
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