$ cat /etc/redhat-release 

Red Hat Enterprise Linux Server release 6.5 (Santiago)

$ wget http://nodejs.org/dist/v0.12.6/node-v0.12.6.tar.gz

$ tar zxf node-v0.12.6.tar.gz

$ cd node-v0.12.6

For root user:

./configure

make

make install

For non root user or to install to your own path:

./configure --prefix=/somewhere/else/to/your/folder

make

make install

and then add /somewhere/else/to/your/folder/bin to your PATH

$ node --version

v0.12.6