Usually with Oracle 10g on Ubuntu, you are setting up an Apache web server to display and run the web pages. This would also be what services the Drupal installation it sounds like you have on this box. If Apache is indeed the web server, you need to open up the Apache configuration to figure out what it is hosting on port 8080. This will tell you what virtual directory it is using and where that virtual directory is physically located.
Here is a good link to help you understand where to find the Apache configuration and understand what is in the config file:
http://www.unix-girl.com/geeknotes/apache_virtual_host_conf.html
You would be looking for the virtual host on port 8080. Under that will be the physical file path.