The first question is what node help for magento? And the answer is it doesn't help anything for magento, it 's just a platform/compiler what we need for some server tools. Sometimes you want to open a port and listen and return a very quick data then nodejs is the best way to do.

Let 's focus to the main part of the article for how to install nodejs.

Installing Node.js via package manager



The packages on this page are maintained and supported by their respective packagers, not the node.js core team. Please report any issues you encounter to the package maintainer. If it turns out your issue is a bug in node.js itself, the maintainer will report the issue upstream.


Gentoo



Node.js is available in the portage tree.




Code:
# emerge nodejs


Debian, LMDE



Node.js is available in official repo for Debian Sid(unstable).


For Debian Wheezy, you have two options:


Build from source



Code:
sudo apt-get install python g++ make checkinstall
mkdir ~/src && cd $_
wget -N http://nodejs.org/dist/node-latest.tar.gz
tar xzvf node-latest.tar.gz && cd node-v 
./configure
checkinstall -y --install=no --pkgversion 0.10.24 # Replace with current version number.
sudo dpkg -i node_

Uninstall





Code:
sudo dpkg -r node


Backports



Alternatively, you can install nodejs from wheezy-backports. If you rely on having node as an executable, install nodejs-legacy as well.


If you need npm as well, you can get it through the installer




Code:
curl https://npmjs.org/install.sh | sudo sh


Ubuntu, Mint, elementary OS



At Least from Ubuntu 12.04, an old version (0.6.x) of Node is in the standard repository. To install, just run:




Code:
sudo apt-get install nodejs


Obtaining a recent version of Node or installing on older Ubuntu and other apt-based distributions may require a few extra steps. Example install:




Code:
sudo apt-get update
sudo apt-get install -y python-software-properties python g++ make
sudo add-apt-repository -y ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
It installs current stable Node on the current stable Ubuntu. Quantal (12.10) users may need to install the software-properties-commonpackage for the add-apt-repository command to work: sudo apt-get install software-properties-common


As of Node.js v0.10.0, the nodejs package from Chris Lea's repo includes both npm and nodejs-dev.


There is a naming conflict with the node package (Amateur Packet Radio Node Program), and the nodejs binary has been renamed fromnode to nodejs. You'll need to symlink /usr/bin/node to /usr/bin/nodejs or you could uninstall the Amateur Packet Radio Node Program to avoid that conflict.


openSUSE & SLE



Node.js stable repos list. Also node.js is available in openSUSE:Factory repository.


Available RPM packages for: openSUSE 11.4, 12.1, Factory and Tumbleweed; SLE 11 (with SP1 and SP2 variations).


Example install on openSUSE 12.1:




Code:
sudo zypper ar http://download.opensuse.org/repositories/devel:/languages:/nodejs/openSUSE_12.1/ NodeJSBuildService 
sudo zypper in nodejs nodejs-devel


Fedora


Node.js and npm are available in Fedora 18 and later. Just use your favorite graphical package manager or run this on a terminal to install both npm and node:


Code:
sudo yum install npm

RHEL/CentOS/Scientific Linux 6



Node.js and npm are available from the Fedora Extra Packages for Enterprise Linux (EPEL) repository. If you haven't already done so, firstenable EPEL.


To check if you have EPEL, run




Code:
yum repolist


if you don't see epel, download it (At the time of this writing, the last version is 6.8.)




Code:
curl -O http://download-i2.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm


then install it




Code:
sudo rpm -ivh epel-release-6-8.noarch.rpm


And then run the following command to install node and npm:




Code:
sudo yum install npm --enablerepo=epel


Arch Linux



Node.js is available in the Community Repository.




Code:
pacman -S nodejs


FreeBSD and OpenBSD



Node.js is available through the ports system.




Code:
/usr/ports/www/node


Development versions are also available using ports




Code:
cd /usr/ports/www/node-devel/ && make install clean


or packages on FreeBSD




Code:
pkg_add -r node-devel


Using pkg-ng on FreeBSD




Code:
pkg install node


or the development versions




Code:
pkg install node-devel


OSX



Using a package




Simply download Macintosh Installer.




Using homebrew:




Code:
brew install node


Using macports:




Code:
port install nodejs


Windows



Using a package




Simply download Windows Installer.




Using chocolatey to install Node:




Code:
cinst nodejs


or for full install with NPM:




Code:
cinst nodejs.install


Using Scoop to install Node:




Code:
scoop install nodejs
Source: github.com

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