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

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

$ sudo npm update readline-sync

Update package globally,

$ npm install -g readline-sync

Git clone:

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

$ sudo  npm install -g ./readline-sync

readline-sync@1.4.7 /usr/lib/node_modules/readline-sync

How to remove readline-sync package :

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

$ sudo npm uninstall readline-sync

Basic Information of readline-sync NPM Package: