###Pre-Req's:
Installing Cloudera Repo on all nodes that you'll install hadoop daemons on:
sudo cat > /etc/yum.repos.d/cloudera.repo <<EOF
[cloudera-cdh5]
# Packages for Cloudera's Distribution for Hadoop, Version 5, on RedHat or CentOS 6 x86_64
name=Cloudera's Distribution for Hadoop, Version 5
baseurl=http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/