Github user drigodwin commented on a diff in the pull request:
https://github.com/apache/brooklyn-docs/pull/194#discussion_r120554021
--- Diff: guide/blueprints/effectors.md ---
@@ -0,0 +1,167 @@
+---
+title: Effectors
+layout: website-normal
+---
+
+Effectors perform an operation of some kind, carried out by a Brooklyn
Entity.
+They can be manually invoked or triggered by a Policy.
+
+Common uses of a effector include the following:
+
+* perform a command on a remote machine,
+* collect data and publish them to sensors.
+
+Entities have default effectors, the lifecycle management effectors like
``start``, ``stop``, ``restart``, and clearly more ``Effectors`` can be
attached to them.
+
+Off-the-Shelf Effectors
+----------------------
+
+Effectors are highly reusable as their inputs, thresholds and targets are
customizable.
+
+### SSHCommandEffector
+
+An ```Effector``` to invoke a command on a node accessible via SSH.
+
+It allows to execute a ```command``` in a specific ```execution
director``` (executionDir) by using a custom ```shell environment` (shellEnv).
--- End diff --
It allows to execute -> It enables execution of a
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