How to install and configure Nagios3 webadmin on ISPConfig3 client website

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This article will cover the steps needed for the correct installation and configuration of Nagios3 on a Linux Debian machine running Ispconfig3, and more important, to blatantly use the Nagios3 web interface (nagiosadmin) within one of the client domain websites. Nagios3 Installation on...
How to install and configure Nagios3 webadmin on ISPConfig3 client website