Before installing Hortonworks, please set up your Centos Envirenment:
https://wp.huangshiyang.com/env-set-up-centos

Automated Installation

Ideal for trying Cloudera enterprise data hub, the installer will download Cloudera Manager from Cloudera’s website and guide you through the setup process.

Pre-requisites: multiple, Internet-connected Linux machines, with SSH access, and significant free space in /var and /opt.

    wget http://archive.cloudera.com/cm5/installer/latest/cloudera-manager-installer.bin

    chmod u+x cloudera-manager-installer.bin

    sudo ./cloudera-manager-installer.bin

Start ntpd service on each node:

service ntpd start
chkconfig ntpd