Downloads the latest LTS version and installs it into /opt/nodejs. Supports armv6l for e.g. the Pi Zero W.

getNodeLTS.sh

#!/bin/bash

# Took the good bits from sdesalas/node-pi-zero/
# Switches to unofficial repo since armv6 was removed from main downloads
#

PI_ARM_VERSION=$(
   uname -a | 
   egrep 'armv[0-9]+l' -o
);

if [[ "$PI_ARM_VERSION" == "armv6l" ]]; then
	LATEST_BASE_URL="https://unofficial-builds.nodejs.org/download/release"
	LATEST_NODEJS_INDEX="${LATEST_BASE_URL}/index.json"
else
	LATEST_BASE_URL="https://nodejs.org/dist"
	LATEST_NODEJS_INDEX="${LATEST_BASE_URL}/index.json"
fi 

VERSION=$(curl -sS $LATEST_NODEJS_INDEX | egrep $PI_ARM_VERSION | egrep '"lts":("[a-zA-Z]+")' | head -n 1 | egrep -o  '("version":")(v[0-9]+.[0-9]+.[0-9]+)"' | sed 's/"version"://' | tr -d '"')

# Creates directory for downloads, and downloads node
cd ~/ && mkdir temp && cd temp;
wget "${LATEST_BASE_URL}/${VERSION}/node-${VERSION}-linux-${PI_ARM_VERSION}.tar.gz"
tar -xzf node-$VERSION-linux-$PI_ARM_VERSION.tar.gz;

# Remove the tar after extracing it.
sudo rm node-$VERSION-linux-$PI_ARM_VERSION.tar.gz;

# This line will clear existing nodejs
sudo rm -rf /opt/nodejs;

# This next line will copy Node over to the appropriate folder.
sudo mv node-$VERSION-linux-$PI_ARM_VERSION /opt/nodejs/;

# Remove existing symlinks
sudo unlink /usr/bin/node;
sudo unlink /usr/sbin/node;
sudo unlink /sbin/node;
sudo unlink /usr/local/bin/node;
sudo unlink /usr/bin/npm;
sudo unlink /usr/sbin/npm;
sudo unlink /sbin/npm;
sudo unlink /usr/local/bin/npm;

# Create symlinks to node && npm
sudo ln -s /opt/nodejs/bin/node /usr/bin/node;
sudo ln -s /opt/nodejs/bin/node /usr/sbin/node;
sudo ln -s /opt/nodejs/bin/node /sbin/node;
sudo ln -s /opt/nodejs/bin/node /usr/local/bin/node;
sudo ln -s /opt/nodejs/bin/npm /usr/bin/npm;
sudo ln -s /opt/nodejs/bin/npm /usr/sbin/npm;
sudo ln -s /opt/nodejs/bin/npm /sbin/npm;
sudo ln -s /opt/nodejs/bin/npm /usr/local/bin/npm;