port already in use linux code example
Example 1: linux how to see ports in use
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22
sudo nmap -sTU -O IP-address-Here
Example 2: linux check what process is using port
$ netstat -ltnp | grep -w ':80'
Example 3: find out which procses is using port linux
sudo lsof -i:<port_number>
Example 4: port 8080 already in use
netstat -ano | findstr 8080
Example 5: django port 8000 already in use
sudo fuser -k 8000/tcp
Example 6: check what ports are open linux
sudo ss -tulw