$ sudo npm install readline
$ sudo npm install -g readline

If want to update the readline package execute the command as below,

$ sudo npm update readline

Update package globally,

$ npm install -g readline

Git clone:

$ sudo  git clone https://github.com/rektide/readline.git

$ sudo  npm install -g ./readline

readline@1.3.0 /usr/lib/node_modules/readline

How to remove readline package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall readline

Basic Information of readline NPM Package: