Add an Apache2 virtual host in Ubuntu

Add the following file into /etc/apache2/sites-available
fart:
<VirtualHost *:80>
    ServerAdmin jerome.gallinari@gmail.com
    ServerName fart.ulticom.com

    DocumentRoot /var/www
    <Directory />
        Options FollowSymLinks
        AllowOverride None
    </Directory>
    <Directory /var/www/>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride None
        Order allow,deny
        allow from all
    </Directory>

    ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
    <Directory "/usr/lib/cgi-bin">
        AllowOverride None
        Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
        Order allow,deny
        Allow from all
    </Directory>

    ErrorLog ${APACHE_LOG_DIR}/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog ${APACHE_LOG_DIR}/access.log combined

    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

</VirtualHost>

Activate the vhost: this creates a symlink from sites-enabled to sites-available
sudo a2ensite fart
Activate the new configuration
sudo /etc/init.d/apache2 reload

Make a correspondance between the new vhost and the local host
/etc/hosts:
127.0.0.1 localhost fart