Here how to install node.js into you CentOS server. Login to your centOS server using SSH client such as putty and type the following commands in shell.

Code

yum install openssl-devel
cd /usr/local/src
wget http://nodejs.org/dist/v0.6.8/node-v0.6.8.tar.gz
tar zxvf node-v0.6.8.tar.gz
cd node-v0.6.8
./configure
make
make install

First log-in to your server through ssh access then follow this command or type these command in shell

wget http://ftp.sunet.se/pub/gnu/gmp/gmp-4.2.2.tar.bz2
tar -xjvf gmp-4.2.2.tar.bz2
cd gmp-4.2.2
./configure
make
make check
make install

nano /var/cpanel/easy/apache/rawopts/all_php5

add or type the following 

--with-gmp

then recompile PHP with default settings

/scripts/easyapache

save and compile, follow the instructions until the scripts finish recompiling the PHP. done!

This command has been successfully tested on Debian, Ubuntu, CentOS and should work for most *NIX systems.

The last line is for Drush to auto download the required library. If it displays a list of drush command, it means drush was installed successfully. Some machines might not have the right folders created, so either update the paths above to match your environment, or create them beforehand using this command.