Install essential tools & required packages
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
yum -y groupinstall "Development Tools"
yum install libxslt-devel libyaml-devel libxml2-devel gdbm-devel libffi-devel zlib zlib-devel openssl-devel libyaml-devel readline readline-devel curl-devel openssl-devel pcre-devel git memcached-devel valgrind-devel mysql-devel ImageMagick-devel ImageMagick libicu libicu-devel libffi-devel make bzip2 autoconf automake libtool bison iconv-devel redis
Install Redis