Easy Upgrading/Updating Node.js for Ubuntu Linux
You are Welcome! The Tutorial Shows You Step-by-Step How to Upgrade/Update Node.js by the NPM Package Manager on Ubuntu 14.04 Trusty Tahr LTS i386/amd64 GNU/Linux.
N is a Simple flavour of node/iojs binary management, no subshells, no profile setup, no convoluted api, just simple.

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Open a Command Line Shell Session
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands) -
Check if npm is Installed
which npm
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Installing n via npm
npm install -g n
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Installing the Latest Node.js Release
With the same command you’ll be able also to Switch to this same version…n latest
(With n you’ll be able to Install and Manage multiple node.js Versions)
To List all node.js available Releases:
n ls
Checking the actual node.js version:
node -V
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For More look at the n Online Documentation
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