Upgrade node.js using n

upgrade-node.sh

#!/bin/bash

# Updates your version of node.js using the version control system "n"
# @param a version (default is latest stable)
# https://github.com/tj/n

sudo npm cache clean -f
sudo npm install -g n
version=`node -v`

if [ $# -gt 0 ]; then
	echo "upgrading node from $version to v$1"
	sudo n $1
else
	echo "upgrading node from $version to latest stable"
	sudo n stable
fi