centos6 32位

rpm -ivh https://mirrors.edge.kernel.org/fedora-epel/6/i386/epel-release-6-8.noarch.rpm

centos6 64位

rpm -ivh https://mirrors.edge.kernel.org/fedora-epel/6/x86_64/epel-release-6-8.noarch.rpmrpm -ivh https://mirrors.kernel.org/fedora-epel/6/x86_64/Packages/e/epel-release-6-8.noarch.rpm

centos7 

rpm -ivh https://mirrors.kernel.org/fedora-epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm