The next logical step is to select the list of servers on which we are going to install the Hadoop-2.6.3.0 version. If you remember the original table, we named our node servers (1–3). We will enter those in the UI.
Since the installation is going to be completely automated, we also need to provide the RSA private key that we generated in the previous section in the UI. This will make sure that the master node can log in to the servers without any password over SSH.
Also, we need to provide a UNIX username that's already been created on all the node (1–3) servers that can also accept RSA key for authentication.
Add id_rsa.pub to ~/.ssh/authorized_keys on the node (1–3) servers.
Please keep in mind that these hostnames ...
