Installation of Nagios XI can be done in two ways.

• Automatic
• Manual

Both ways are pretty easy and very similar. In both cases, the procedure will verify the database, the necessary packages and other requirements. Let's start with the automatic way :)

In order to automatically install, we can simply run the following command:

curl https://assets.nagios.com/downloads/nagiosxi/install.sh | sh

[  OK  ]
ndo2db was not running... could not stop
Starting ndo2db: done.
Stopping nagios: done.
Starting nagios: done.
rm: cannot remove `/usr/local/nagiosxi/var/subsys/npcd.pid': No such file or directory
NPCD was not running.
NPCD started.
Shutting down ntpd: [FAILED]
Starting ntpd: [  OK  ]
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
Daemons started OK
RESULT=0
Running './Z-webroot'...
RESULT=0

Nagios XI Installation Complete!
--------------------------------

You can access the Nagios XI web interface by visiting:
    http://172.23.4.37/nagiosxi/

After lengthy installation, we have to change the permissions of the installation.

We can connect to the server using a browser on the following address

http://IP_adress/nagiosxi

• Create new services from:

Configure → Configuration Wizards

• Review & Modify existing services from:

Configure → Core Config Manager

• Monitor existing services

Home → BBmap → Services:

You will have to of course configure the new service (username,password) if it will be regarding database or a server. Which includes creation of a monitoring user with the correct privileges and accesses. Furthermore, once the Nagios XI is installed, you will have to reset the root password for the mysql/mariaDB database.