First, I add this 2 lines to /etc/apache2/ports.conf (I'm gonna add listenning port at port 8000)
Second, Edit file named /etc/apache2/site-enabled/000-default by following step
copy content of all in
So you have something similar to this
Last, restart your apache with this command "/etc/init.d/apache2 restart"
Booom! Your Apache Http Server will now can listen to 8000 port.
Failed memo :
1. can't restart apache with this command apache2 -k restart
2. If adding just Listen 8000 in /etc/apache2/ports.conf, the 8000 port query is listenned but no thing is displayed.