Ubuntu Server install Node.js proper way

install-nodejs.sh

#!/usr/bin/env bash

NODEJS_VERSION=5.6.0

# aria2 is a really nice tool. promise, you won't regret
apt-get install -y aria2

echo "Installing Node.js v${NODEJS_VERSION} to /opt/nodejs"
cd /opt/
## cleanup
rm -rf /opt/nodejs
rm -rf /opt/node-v${NODEJS_VERSION}-linux-x64
## download & extract
aria2c https://nodejs.org/dist/v${NODEJS_VERSION}/node-v${NODEJS_VERSION}-linux-x64.tar.gz
tar zxvf node-v${NODEJS_VERSION}-linux-x64.tar.gz
## rename it to /opt/nodejs
mv node-v${NODEJS_VERSION}-linux-x64 nodejs
## cleanup
rm -rf node-v${NODEJS_VERSION}-linux-x64.tar.gz
rm -rf /usr/bin/node
rm -rf /usr/bin/npm
## link executables in case of profile.d fails
ln -s /opt/nodejs/bin/node /usr/bin/node
ln -s /opt/nodejs/bin/npm /usr/bin/npm

## add paths via profile.d
rm -f /etc/profile.d/nodejs-${NODEJS_VERSION}.sh
echo "export NODE_BIN=/opt/nodejs/bin" >> /etc/profile.d/nodejs-${NODEJS_VERSION}.sh
echo "export NODE_PATH=/opt/nodejs/lib/node_modules" >> /etc/profile.d/nodejs-${NODEJS_VERSION}.sh
echo "export PATH=\"\$PATH:\${NODE_BIN}\"" >> /etc/profile.d/nodejs-${NODEJS_VERSION}.sh

## apply nodejs
source /etc/profile.d/nodejs-${NODEJS_VERSION}.sh

echo "Node.js is installed: `node -v`"
echo "NPM is installed: `npm -v`"

echo "Installing Generic Nodejs Modules"

## these are also useful. 
/opt/nodejs/bin/npm install -g bower
/opt/nodejs/bin/npm install -g gulp-cli
/opt/nodejs/bin/npm install -g forever

echo "Done. Have a nice day!"

Ready?
curl -fsSL https://gist.githubusercontent.com/risyasin/a61aea0e5fa88d635f59/raw/4a2d33917537432a119b31965238e2e6edab9f19/install-nodejs.sh | bash