Alright, I now show you the way to install Joomla under Ubuntu OS
INSTALL
1. make sure that all basic web server software are well installed
2. download package from its official website www.joomla.org [I really recommend for newbie to start on stable version only, otherwise goahead on beta version by simple SVN, check it out !!!]
3. unpackage it
tar xvfz Joomla_x.x.x-Stable-.....tar.gz -C /var/www/
4. create empty file "configuration.php" in order to CMS installer could create configuration information for us
nano configuration.php
5. privilege it for all
chmod 777 configuration.php
6. restart apache once again
/etc/init.d/apache2 restart
7. type "http://localhost/