View the port of the docker container
sudo netstat -tulpn | grep docker
to view the specified port, you can combine the grep command:
netstat -ap | grep 80
Find the pid fuser 80/tcp used by the specified port
To close the program using this port, use kill + the corresponding pid
kill -9PID number
--------------------------------------------
Check which process or program occupies a certain port under Linux.
netstat -anp|grep 3306
kill -9 process number can end the process.