Create a link in UBUNTU to a app or module or extension -- how to install fpdf in ubuntu

1. Please login as "root" or admin privilege as root equivalent in terminal and give the following command
    # sudo apt-get install php-fpdf
2. Internet connection should be there, after successful installation there will be a file in the following location
   # ls -l /usr/share/php/fpdf
3. Please create a symbolic link and direct the link to make available on your webserver ( the default location of apache web server is " /var/www/ " ) using the following command
    # ln -s /usr/share/php/fpdf  /var/www/fpdf
4. Reload your webserver
  #/etc/init.d/apache2 restart
  (or)
   #/etc/init.d/apache2 force-reload
   (or)
   #service apache2 restart
5. Make sure PHP commands on web page associated with the conversion to PDF function like this
   <?php
          require('fpdf/fpdf.php');
    ?>
6. Finish.

For further reference ,
https://kokikode.wordpress.com/2010/03/28/how-to-install-php-fpdf-in-ubuntu/