Configuring virtual hosts in Ubuntu Apache

Create a new virtual host file as follows:
sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/example.com.conf

The edit it to look like below:

<VirtualHost *:80>
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Create another one if necessary.

To enable the virtual hosts
We can use the a2ensite tool to enable each of our sites like this:

sudo a2ensite example.com.conf
sudo a2ensite test.com.conf
When you are finished, you need to restart Apache to make these changes take effect:

sudo service apache2 restart