Install Node.js

Ubuntu and Debian (from nodesource.com)

It is an abstract from Node.js documentation to have installation repos and command handy.

Node.js LTS

# Using Ubuntu
curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
sudo apt-get install -y nodejs

# Using Debian, as root
curl -fsSL https://deb.nodesource.com/setup_lts.x | bash -
apt-get install -y nodejs

Node.js Current

# Using Ubuntu
curl -fsSL https://deb.nodesource.com/setup_current.x | sudo -E bash -
sudo apt-get install -y nodejs

# Using Debian, as root
curl -fsSL https://deb.nodesource.com/setup_current.x | bash -
apt-get install -y nodejs

Node.js v16.x

# Using Ubuntu
curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
sudo apt-get install -y nodejs

# Using Debian, as root
curl -fsSL https://deb.nodesource.com/setup_16.x | bash -
apt-get install -y nodejs

Node.js v14.x

# Using Ubuntu
curl -fsSL https://deb.nodesource.com/setup_14.x | sudo -E bash -
sudo apt-get install -y nodejs

# Using Debian, as root
curl -fsSL https://deb.nodesource.com/setup_14.x | bash -
apt-get install -y nodejs

Node.js v12.x

# Using Ubuntu
curl -fsSL https://deb.nodesource.com/setup_12.x | sudo -E bash -
sudo apt-get install -y nodejs

# Using Debian, as root
curl -fsSL https://deb.nodesource.com/setup_12.x | bash -
apt-get install -y nodejs

Source: NodeSource Node.js Binary Distributions