@Chaitanya D, 1) If you choose public repository , then all the rpms will be downloaded from the hortonworks public repository. If you choose local repository then you need to set up a local yum repo and put the tarball there and run a webserver to serve these tarball. This is generally used in a setup where network access is blocked to outside world. You can use public repo. 2) In the target hosts , you need to mention hostnames of all the nodes which are going to be as part of the cluster. SSH private key is ssh key of the user running ambari-server. 3) No. Each machine is treated as a single node. You need to setup password-less ssh before giving the details in #2 . Since you are using a single node you do the below #sudo su ---> to become root user
#ssh-keygen -----> generate the ssh keys
# cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys ---> for password-less ssh
#cat ~/.ssh/id_rsa ----> copy the output and put it in SSH private key in UI
# cat /etc/hostname ----> copy and put in target hosts Thanks, Aditya
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