Creating Vhosts in Ubuntu

Steps for Creating Vhosts in Ubuntu :

1)
Create the folders that will host your new sites. By default, Apache in Ubuntu serves from /var/www

2) 

mkdir /var/www/site

3) 

cp /etc/apache2/sites-available/default /etc/apache2/sites-available/site

4)  

Edit the new config files for each site using your preferred text 
editor. Add the line ServerName server1 right below the ServerAdmin line
 and change both DocumentRoot and Directory to point to your new sites.

repeat this step for as many new sites as you’ll be 
creating

/etc/apache2/sites-available/site

<VirtualHost *:80>
 ServerAdmin webmaster@localhost
 ServerName site1

 DocumentRoot /var/www/site
 <Directory />
  Options FollowSymLinks
  AllowOverride All
 </Directory>
 <Directory /var/www/site1/>
  Options -Indexes FollowSymLinks MultiViews
  AllowOverride All
  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

</VirtualHost>

5)  

  After you have edited the config files just tell Apache to start serving the 
new domains and stop serving the default:

 sudo a2ensite site

 6)
Now reload apache and you should be able to get to each of your new domains
 

sudo /etc/init.d/apache2 reload

7)

for disabling the site use command 

sudo a2dissite site