Added details about console access (home-assistant#6140)

DubhAd · fabaff · commit b65b5c734199 · 2018-09-01T23:05:16.000+02:00
Since there's nothing in the docs about the console access, and it's a common question, adding it here.
diff --git a/source/hassio/commandline.markdown b/source/hassio/commandline.markdown
@@ -89,3 +89,7 @@ GLOBAL OPTIONS:
    --help, -h     show help
    --version, -v  print the version
 ```
+
+## {% linkable_title Console access %}
+
+You can also access HassOS via a directly connected keyboard and monitor, the console. To log in to the physical console the username is `root`, with no password.
