https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager
Node.js and npm are available from the Fedora Extra Packages for Enterprise Linux (EPEL)repository. If you haven't already done so, first enable EPEL.
To check if you have EPEL, run
yum repolist
if you don't see epel, install it via RPM (At the time of this writing, the last version is 6.8.).
First import the key:
sudo rpm --import https://fedoraproject.org/static/0608B895.txt
Then install
sudo rpm -Uvh http://download-i2.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
And then run the following command to install node and npm:
sudo yum install nodejs npm --enablerepo=epel
or if this doesn't work for you install node separately:
sudo yum install npm --enablerepo=epel