Chapter 3. Installing Nagios

Nagios is composed of three big chunks: the daemon, the Web interface, and the plugins. The daemon and Web interface make up the tarball available from www.nagios.com, and the plugins must be downloaded and installed separately. (Some distributions include the plugins in their Nagios packages.) 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 plugins tarball. Installing the plugins is technically an optional step; it’s entirely possible to run Nagios with nothing but custom plugins, but most people ...

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