APACHE2 - VIRTUAL HOST SETTING
 	
Configure Virtual Hostings to use maltiple domain names.
The example below is set on the environment which the domain name is [srv.world], virtual domain name is [virtual.host (root directory [/home/ubuntu/public_html])].
It's necessarry to set Userdir settings for this example, too.


[1]	Configure Apache2

$ vi /etc/apache2/sites-available/virtual.host.conf

# create new for [virtual.host]

<VirtualHost *:80>
    ServerName virtual.host
	ServerAlias www.virtual.host
    ServerAdmin webmaster@virtual.host
    DocumentRoot /home/debian/public_html
    ErrorLog /var/log/apache2/virtual.host-error.log
    CustomLog /var/log/apache2/virtual.host-access.log combined
    LogLevel warn
</VirtualHost>

$ a2ensite virtual.host

Enabling site virtual.host.

To activate the new configuration, you need to run:

$ systemctl reload apache2

$ systemctl restart apache2


[2]	Create a test page and access to it from a client computer with a web browser.

It's OK if following page is shown.

$ mkdir ~/public_html

$ vi ~/public_html/index.html
<html>
<body>
<div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">
Virtual Host Test Page
</div>
</body>
</html>