hi there,

I following your tutorial with observium CE
I have ubuntu 14.04 but when I try to install the mysql db, this is the error
I have installed all requirements and I used a lot your monitoring system 

so, right now:

root@abee:/opt/observium/includes# php update/update.php 
PHP Warning:  include(includes/defaults.inc.php): failed to open stream: No such file or directory in /opt/observium/includes/update/update.php on line 16
PHP Warning:  include(): Failed opening 'includes/defaults.inc.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /opt/observium/includes/update/update.php on line 16
PHP Warning:  include(config.php): failed to open stream: No such file or directory in /opt/observium/includes/update/update.php on line 17
PHP Warning:  include(): Failed opening 'config.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /opt/observium/includes/update/update.php on line 17
PHP Warning:  include(includes/definitions.inc.php): failed to open stream: No such file or directory in /opt/observium/includes/update/update.php on line 18
PHP Warning:  include(): Failed opening 'includes/definitions.inc.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /opt/observium/includes/update/update.php on line 18
PHP Warning:  include(includes/functions.inc.php): failed to open stream: No such file or directory in /opt/observium/includes/update/update.php on line 19
PHP Warning:  include(): Failed opening 'includes/functions.inc.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /opt/observium/includes/update/update.php on line 19

if I try: 

root@abee:/opt/observium/# php includes/update/update.php

headed back without returning errors

what is the problem?
how can I fix it?

thanks in advance