all ports ubuntu code example
Example 1: ubuntu listening ports
# To see ports in use
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTENExample 2: ubuntu open all port
sudo ufw allow 1:9999/tcp# To see ports in use
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTENsudo ufw allow 1:9999/tcp