daemonizing tutorial includes a brief paragraph about centos

docs/tutorials/daemonizing.rst

@@ -309,3 +309,9 @@ Windows
 See this excellent external tutorial:
 
 http://www.calazan.com/windows-tip-run-applications-in-the-background-using-task-scheduler/
+
+CentOS
+======
+In CentOS we can take advantage of built-in service helpers, such as the
+pid-based status checker function in ``/etc/init.d/functions``.
+See the sample script in http://github.com/celery/celery/tree/3.0/extra/centos/.