I'm trying to add another port to apache2 to listen to. I did all the steps in the following link, but still can't get my page to load on another port number (tried 81, 8444, 8090).

https://www.ostechnix.com/how-to-change-apache-ftp-and-ssh-default-port-to-a-custom-port-part-1/

Currently apache2 is listening to port 8090, as shown by "sudo netstat -tulpn | grep :8090".