I am currently in section 3 where it mentions to Installing, Configuring and deploying a HDP cluster.
Here I opened a browser on my desktop and opened ambari host machine and logged into ambari.
Then, I launched installation wizard and setup my cluster name. Further, I selected stack HDP 2.4 and enabled RHEL6 in repository options for my centos6.5 machine. I observe that when I try to wget the URL mentioned for HDP 2.4 and HDP utils they work fine , but it gives the error in wizard and hence not able to proceed.