The above approach will not work as it requires 'hdp-select'. According to HW, HDP is not allowed on a cluster where HDF is installed and vice-versa. An adequate solution is, to install Apache Hadoop (version same as your HDP). Steps I followed:
Setup Java, A running HDF cluster will not require it but no harm in cross check. Download Hadoop from Apache Mirror, Unpack it and move it to the desired location. Set HADOOP_HOME and HADOOP_CONF_DIR in /etc/profile. By default conf. is set to HADOOP_HOME/etc/hadoop. It is good to keep your configs separate. I created HADOOP_HOME/conf. Important step: Copy existing hdp confs (/etc/hadoop/conf) to HADOOP_HOME/conf. Do not format or start Hadoop as we are connecting to an existing cluster. Last step, set HADOOP_HOME/bin in your user profile file (usually .bash_profile/.profile). That's it, try 'hadoop' or 'hdfs' command. I hope this will help somebody in future!
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