how to Enable EPEL Repository for RHEL linux.

how to Enable EPEL Repository for RHEL linux.
EPEL (Extra Packages for Enterprise Linux)
ref : linux 

intsall nodejs in rhel linux .

intsall nodejs in rhel linux .
command :
1) sudo rpm -ivh epel-release-7-6.noarch.rpm
2) sudo yum install npm
3) node --version

find puppet intalled in rhel linux

how to find the version  of puppet intalled in rhel linux

cmd : rpm -qa | grep puppet

puppetlabs-release-7-12.noarch
puppet-...x.noarch
puppet-server-x.x.x.x.noarch