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add a little info on upgrading 

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
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Sven Dowideit 2014-02-11 14:58:42 +10:00
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docs/sources/installation/mac.rst
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@ -147,6 +147,18 @@ If SSH complains about keys:
ssh-keygen -R '[localhost]:2022'
Upgrading to a newer release of boot2docker
-------------------------------------------
To upgrade an initialised VM, you can use the following 3 commands. Your persistence
disk will not be changed, so you won't lose your images and containers:
.. code-block:: bash
./boot2docker stop
./boot2docker download
./boot2docker start
About the way Docker works on Mac OS X:
---------------------------------------