1.1. RHEL/CentOS 5.x

Install the EPEL repository:
```
yum install epel-release 
```

Confirm the repository is configured by checking the repo list

yum repolist

You should see the Ambari, HDP utilities, and EPEL repositories in the list

  repo id                repo name                                    	   
| AMBARI-1.x           | Ambari 1.x                                       
| HDP-UTILS-1.1.0.15   | Hortonworks Data Platform Utils Version - HDP-UT   
| epel                 | Extra Packages for Enterprise Linux 5 - x86_64

Install the Ambari bits using yum. This also installs PostgreSQL:
```
yum install ambari-server 
```
You are asked if you want to allow the installation of a GPG key. Allow it. This key is used to certify the installation bits.

Index