icinga2/doc/2.3-setting-up-check-plugin...

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## Setting up Check Plugins
On its own Icinga 2 does not know how to check external services. The
[Nagios Plugins Project](https://www.nagios-plugins.org/) provides an extensive
set of plugins which can be used by Icinga 2 to check whether services are
working properly.
The recommended way of installing these standard plugins is to use your
distribution's package manager. For your convenience here is a list of package
names for some of the more popular operating systems/distributions:
OS/Distribution | Package Name | Installation Path
----------------|----------------|---------------------------
RHEL/CentOS | nagios-plugins | /usr/lib/nagios/plugins
Debian | nagios-plugins | /usr/lib/nagios/plugins
FreeBSD | nagios-plugins | /usr/local/libexec/nagios
OS X (MacPorts) | nagios-plugins | /opt/local/libexec
Depending on which directory your plugins are installed into you may need to
update the `plugindir` macro in your Icinga 2 configuration. This macro is used
by the service templates contained in the Icinga Template Library to determine
where to find the plugin binaries.