Update source/tutorial/install-mongodb-on-linux.txt

Author: George Sakellaris

source/tutorial/install-mongodb-on-linux.txt

@@ -60,7 +60,7 @@ extract the files from the archive:
 
    .. code-block:: sh
 
-      cp -R -n  mongodb-osx-20??-??-??/ mongodb
+      cp -R -n  mongodb-linux-????-??-??/ mongodb
 
 You can find the :program:`mongod` binary, and the binaries all of the
 associated MongoDB utilities, in the ``bin/`` directory within the