get-node.sh

#!/usr/bin/sudo bash
# This script finds, downloads and installs the latest version of nodejs for linux x64. 
# This script is designed to be safe to rerun.
sudo -v
VERSION="$(wget -q -O- https://nodejs.org/dist/latest/ | \
grep  -o -E "node-v[0-9]+\.[0-9]\.[0-9]-linux-x64" | \
head -n1)"

echo Installing $VERSION\.\.\.
wget -q https://nodejs.org/dist/latest/$VERSION\.tar\.gz -P /tmp
tar -xf /tmp/$VERSION\.tar\.gz -C /tmp
sudo cp -R /tmp/$VERSION/{bin,include,lib,share} /usr/local/ > /dev/null
rm -rf /tmp/$VERSION*

mkdir ~/.npm-global 2> /dev/null
npm config set prefix '~/.npm-global'

if ! grep -q "export PATH=~/.npm-global/bin:\$PATH" ~/.bashrc; then
# Only add to .bashrc if its not there
  echo "export PATH=~/.npm-global/bin:\$PATH" >> ~/.bashrc
fi
echo Done\.
node -v
npm -v