The absolute path is the directory location on a server's hard drive where Joomla! is located. In Joomla! v.1.0.x the configuration.php file would be something like the following, however, it can vary depending on your server.

$mosConfig_absolute_path = '/home/joomla/public_html';

To find out what your absolute path is, copy the following code into a text editor (i.e. JEdit, Notepad, etc), save the file as a .php naming it whatever you prefer (i.e anyfilename.php.).

<?php 
 $path = getcwd();
 echo "Your Absoluthe Path is: ";
 echo $path;
 ?>

Using your FTP software, ftp the file you have just created to your root folder.

Open your web browser and type in http://www.yourdomain.com/filename.php. The result will show the absolute path!

IMPORTANT: For security reasons, delete this file as soon as you have ascertained the information you require.