Chapter 3. Installing Nagios

Nagios is composed of three chunks: the daemon, the Web interface, and the plug-ins. The daemon and Web interface make up the tarball available from, and the plug-ins must be downloaded and installed separately.1 Although the Nagios daemon comes with the Web interface, the daemon may be installed alone. Nagios does not require the Web interface to effectively monitor the environment and to send notifications.

After the Daemon is installed, most people download and install the plug-ins tarball. Installing the plug-ins is technically an optional step; it’s entirely possible to run Nagios with nothing but custom plug-ins, but most people consider that to be a reinvention of the wheel. The plug-ins provided ...

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