First uninstall the nodejs package:
sudo apt remove nodejs
Ubuntu 16.04 contains a version of Node.js in its default repositories that can be used to easily provide a consistent experience across multiple systems. At the time of writing, the version in the repositories is v4.2.6. This will not be the latest version, but it should be quite stable and sufficient for quick experimentation with the language.
In order to get this version, we just have to use the apt package manager. We should refresh our local package index first, and then install from the repositories:
sudo apt-get update
sudo apt-get install nodejs
If the package in the repositories suits your needs, this is all you need to do to get set up with Node.js. In most cases, you’ll also want to also install npm, which is the Node.js package manager. You can do this by typing:
sudo apt-get install npm
This will allow you to easily install modules and packages to use with Node.js.
Because of a conflict with another package, the executable from the Ubuntu repositories is called nodejs instead of node. Keep this in mind as you are running software.
To check which version of Node.js you have installed after these initial steps, type:
nodejs -v
Screenshot for nodejs version