Easy Upgrading/Updating Node.js for Ubuntu
How to Upgrade/Update Node.js by the NPM Package Manager on Ubuntu 14.04 Trusty Tahr LTS GNU/Linux – Step by step Tutorial.
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)  
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Check if npm is Installed 
 With: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 
