Revises section on viewing logs.[#130303551]

deploy-apps/troubleshoot-app-health.html.md.erb

@@ -173,7 +173,7 @@ If two apps share a route outside of a Blue-Green deploy strategy, choose one ap
 
 Use the techniques in this section to gather diagnostic information and troubleshoot app deployment issues.
 
-### <a id='env'></a>Examining Environment Variables ###
+### <a id='env'></a>Examine Environment Variables ###
 
 `cf push` deploys your application to a container on the server.
 The environment variables in the container govern your application.
@@ -215,31 +215,13 @@ $ cf env my-app
  my-drain: http://drain.example.com
 </pre>
 
-### <a id='logs'></a>Exploring logs ###
+### <a id='logs'></a>View Logs ###
 
-To explore all logs available in the container, use the `cf files` command to view the log filenames, then view the log that interests you.
+To view app logs streamed in real-time, use the `cf logs APP-NAME` command.
 
-<pre class="terminal">
-$ cf files my-app logs/
-    Getting files for app my-app in org my-org / space development as a.user@example.com...
-    OK
-
-    staging_task.log                          844B
-    stderr.log                                182B
-    stdout.log                                  0B
-
-$ cf files my-app logs/stderr.log
-    Getting files for app my-app in org my-org / space development as a.user@example.com...
-    OK
-
-    [2014-01-27 20:21:58] INFO  WEBrick 1.3.1
-    [2014-01-27 20:21:58] INFO  ruby 1.9.3 (2013-11-22) [x86_64-linux]
-    [2014-01-27 20:21:58] INFO  WEBrick::HTTPServer#start: pid=31 port=64391
-</pre>
-
-<p class="note"><strong>Note</strong>: Diego does not support the <code>cf files</code> command. For apps deployed to Diego, use the <code>cf ssh APP-NAME</code> command to list files in your application instances.</p>
+To aggregate your app logs to view log history, bind your app to a syslog drain service. For more information, see [Streaming Application Logs to Log Management Services](./devguide/services/log-management.html).
 
-### <a id='trace'></a>Tracing Cloud Controller REST API Calls ###
+### <a id='trace'></a>Trace Cloud Controller REST API Calls ###
 
 If a command fails or produces unexpected results, re-run it with HTTP tracing
 enabled to view requests and responses between the cf CLI and the Cloud Controller REST API.