update ansible command usage at user document
ansible command need assign hosts to run. Change-Id: Ifadc48ba06ef1726aa73b21ff37366360cfffbbe
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@ -274,7 +274,7 @@ than one node, edit ``multinode`` inventory:
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Ubuntu might not come with python pre-installed. That will cause
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errors in ping module. To quickly install python with ansible you
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can run ``ansible -m raw -a "apt-get -y install python-dev all"``
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can run ``ansible -i multinode all -m raw -a "apt-get -y install python-dev"``
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Kolla passwords
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---------------
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