If you have a server there is no need of the GUI interface, is there?
A good linux admin will never need it. So I am removing it, here are …
Nagios/Centreon TroubleShooting
Troubleshooting Nagios/Centreon :
I. If Centreon monitor does not update itself
(you see nagios different then centreon).
Could be a permission problem related to status.log,
Read the user nagios …