ubuntsu linux apache2 php

* install
- sudo apt-get install php5 libapache2-mod-php5
- sudo /etc/init.d/apache2 restart

* edit & test
- sudo emacs /var/www/phpinfo.php
<?php phpinfo(); ?>

* reference : http://dqn.sakusakutto.jp/2008/08/ubuntuphp5.html