EPEL (Extra Packages for Enterprise Linux) is a repository of (as the name implies) A collection of packages not directly released with the given linux distribution release cycle. By default these packages are not available but all the wiring in the amazon AMI instance is already done all one needs to do is enable it. To do so check the two following ways.
Under the section marked
To temporarily enable the EPEL 6 repository, use the yum enablerpo option :
yum search iperf --enablerepo=epel
This will return :
That’s it short and sweet 😛