Hi I want to know which operating system suites best to have a hadoop cluster which is easy to manage afterwards once setup
The list of operating systems that HDP 2.5 supports can be found at http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.5.0/bk_release-notes/content/ch01s02s01.html. Ambari has a web-based UI that will be consistent from OS to OS and since the cluster is typically primarily managed via Ambari, your choice of OS should be based upon your environment or personal preferences rather than ease of cluster management.
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It's better you go for single node vm if you are just looking for learning purpose . Check the links below,
No I am not looking for learning purpose but I am doing research for my organization to take this in production as well later.