Nagios Core, formerly known as Nagios, is a free and open-source computer-software application that monitors systems, networks and infrastructure. Nagios offers monitoring and alerting services for servers, switches, applications and services.

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This Nagios Installation Tutorial will help you to learn how to install Nagios Core on a CentOS operating system and how to monitor more than one host. The same steps can be used for Nagios Installation on Ubuntu, Nagios Installation…