I installed Node.js from binary. I downloaded the binary file from Node.js website and unzipped it in /opt/nodejs. Next, I set the binary path in /etc/environment in vim editor. 

sudo vim /etc/environment

Adding “:/opt/nodejs/node-<version>-<os-type>/bin” in the end of PATH.

This is the beginning of my /etc/environment.

This is the end of /etc/environment.

There are a couple different ways to reload /etc/environment. Here is the most simplest way to reload /etc/environment. 

. /etc/environment

Now, I can run Node.js command: node or npm.

Running Node.js

By : Peita