The reason given
System RHEL / CentOS EPEL repository 7.x / 6.x / 5.x is not enabled.
EPEL on behalf of additional packages Enterprise Linux and distributed online, you can automatically download and install the yum program.
As long as this option is enabled, the error will be resolved
Solution
- CentOS7
# If you do not need to install wget wget install yum wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7 .noarch.rpm rpm -ivh epel-release-latest-7.noarch.rpm
- CentOS6
# RHEL/CentOS 6 32-Bit wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm rpm -ivh epel-release-6-8.noarch.rpm # RHEL/CentOS 6 64-Bit wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -ivh epel-release-6-8.noarch.rpm
And then if necessary
yum update