Use pkill to shutdown elasticsearch using pid file
While running these commands from alias, facing issues using kill `cat pid`, In some situations, the more compact:
```
pkill -F /var/run/myProcess.pid
```
is the way to go.
@@ -14,7 +14,7 @@ To shut down Elasticsearch, kill the process ID recorded in the `pid` file:
[source,sh]
--------------------------------------------
-kill `cat pid`
+pkill -F pid
--------------------------------------------
NOTE: The startup scripts provided in the <<rpm,RPM>> and <<deb,Debian>>
