Hadoop - Adding Datanode

Hi Team ,

I have a new server which needs to be made as datanode for my existing single node cloudera setup .

I did gone through some of the online documentation and most of them said to install to through cloudera manager , However my server cannot open for internet , Hence using Cloudera installing hadoop on new data node is ruled out .

Could some one help me with step by step procedure for installing hadoop on a new server and move that as a new data node to existing Hadoop Cluster .

Thanks again