Nagios Support Forum

Dear All,
I am new to Nagios and I have a machine with cacti running on it. I downloaded the nagios xi 2009 and then ran the script ./fullinstall. It executed for a few minutes and then it gave the following errors. My sql is running fine and I have tried everything online regarding sql error but no help. The errors are pasted below, please help.

NOTE: If prompted, enter the MySQL root password
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
NOTE: If prompted, enter the MySQL root password
ERROR: NDOUtils database install appears to have failed - exiting.
/tmp/nagiosxi/subcomponents
ERROR: Subcomponent 'ndoutils' installation failed - exiting.
/tmp/nagiosxi
Subcomponents installation failed - exiting
RESULT=1

===================
INSTALLATION ERROR!
===================
Installation step failed - exiting.
Check for error messages in the install log (install.log).
The script that failed was: './A-subcomponents'

I am using CentOS 5.5.

We recommend installing Nagios xi only on a "clean" system. In order to install Nagios xi you will have to completely remove mysql and postgres from you system and run ./fullinstall again.