/and many others/apache2/ports.conf: This file specifies the ports that Apache will hear on. By default, Apache listens on port 80 and Also listens on port 443 whenever a module delivering SSL capabilities is enabled. Immediately after allowing the command operate, all required packages are installed and we could check it https://douglasq764xkv3.ageeksblog.com/27702417/about-apache-support