nagios installation error

[DOkuwa]

Hello
I having this installation error after running this command on a red hat server
curl https://assets.nagios.com/downloads/nagiosxi/install.sh | sh

ERROR: can not find RHNS CA file: /usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT
See /var/log/up2date for more information
ERROR: Please add the 'Optional' channel to your Red Hat systems subscriptions.
You can do so in the Redhat Network web interface or using the rhn-channel command.
or, install the yum-utils package and use the following command:
yum-config-manager --enable rhel-7-server-optional-rpms
RESULT=1

===================
INSTALLATION ERROR!
===================
Installation step failed - exiting.
Check for error messages in the install log (install.log).

If you require assistance in resolving the issue, please include install.log
in your communications with Nagios XI technical support.

The script that failed was: './0-repos'

Thanks

[mcapra]

As the message states, you need to add the Optional channel to your Red Hat systems subscription. Here's a guide from Red Hat:
https://access.redhat.com/solutions/260203

If you're not quite sure how to do that, I would suggest touching base with your Red Hat administrator.

[dwasswa]

Thanks @ mcapra ,

@DOkuwa please try what @ mcapra mentioned and let us know if you have any questions.

[DOkuwa]

Thanks
working
please close this case