Посмотреть версию PHP $ Apacheна Ubuntuserver
$php5 -v
PHP 5.4.6-1ubuntu1.2 (cli) (built: Mar 11 2013 14:54:18)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies
$ apache2 -v
Server version: Apache/2.2.22 (Ubuntu)
Server built: Mar 8 2013 15:53:14