Fixed a typo in the command to concat key and pem

aledalgrande · aledalgrande · commit ad5bc7004625 · 2012-09-12T13:40:03.000+02:00
diff --git a/source/administration/ssl.txt b/source/administration/ssl.txt
@@ -60,7 +60,7 @@ and the ``.pem`` certificate, use the following command:
 
 .. code-block:: sh
 
-   cat mongodb-cert.crt mongodb-cert.pem > mongodb.pem
+   cat mongodb-cert.key mongodb-cert.pem > mongodb.pem
 
 Clients
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