Such versions are out of support, so there's no need to keep
track in the docs for 2.9.
A check command definition. Additional default command custom attributes can be
defined here.
-> **Note**
->
-> Icinga 2 versions < 2.6.0 require the import of the [plugin-check-command](10-icinga-template-library.md#itl-plugin-check-command) template.
-
Example:
```
An event command definition.
-> **Note**
->
-> Icinga 2 versions < 2.6.0 require the import of the [plugin-event-command](10-icinga-template-library.md#itl-plugin-event-command) template.
-
Example:
```
A notification command definition.
-> **Note**
->
-> Icinga 2 versions < 2.6.0 require the import of the [plugin-notification-command](10-icinga-template-library.md#itl-plugin-notification-command) template.
-
Example:
```