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Creating the Hadoop cluster

In this section, we will build a Hadoop cluster using the Ambari web interface. This section assumes the following things:

The nodes (1–3) are reachable over SSH from the master server
Admin can log in to the nodes (1–3) using the id-rsa private key from the master server
A UNIX user can run sudo and perform all administrative actions on the node (1–3) servers
The Ambari server setup is complete
The Ambari web interface is accessible to the browser without any firewall restrictions

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