[Anik]

Well here is a small tutorial

Add these lines on your apache configuration file.

Code: (Select All)

<VirtualHost *:80>
    ServerName subdomain.example.com
    DocumentRoot /var/www/subdomain.example.com
</VirtualHost>

Now create your directory for the subdomain

Code: (Select All)

mkdir -p /var/www/subdomain.example.com

Last Step restart your apache server

Code: (Select All)

sudo service apache2 restart

You can repeat the same steps for each subdomain you want.