As a follow up to the following help guide, can you please post a similar step by step instructions for Red Hat Enterprise Linux Server release 6.6 (Santiago)
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We do not have a guide for RHEL 6 but the guide you linked for CentOS 7 (or RHEL 7) should allow you to complete the installation on CentOS/RHEL 6 as well. Looking it over I do not believe there is anything version specific in that tutorial. If you run into trouble with it, let us know and we can help troubleshoot here.