CentOS 7
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Install Node.js 4
2016/07/03
 
Install ServerSide JavaScript Environment Node.js 4 (LTS).
[1] It's possible to install from CentOS SCLo Software Collections.
It's OK to install it even if another version of Node.js is already installed because 4.x is located on another PATH.
# install from SCLo

[root@dlp ~]#
yum --enablerepo=centos-sclo-rh -y install rh-nodejs4
[2] Packages from Software Collections are installed uder the /opt directory.
To use it, Load environment variables like follows.
# load environment variables

[root@dlp ~]#
scl enable rh-nodejs4 bash
[root@dlp ~]#
node -v

v4.4.2
[root@dlp ~]#
which node

/opt/rh/rh-nodejs4/root/usr/bin/node
[3] If you'd like to enable Node.js 4 automatically at login time, configure like follows.
[root@dlp ~]#
vi /etc/profile.d/rh-nodejs4.sh
# create new

#!/bin/bash

source /opt/rh/rh-nodejs4/enable
export X_SCLS="`scl enable rh-nodejs4 'echo $X_SCLS'`"
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