$ sudo npm install watchify
$ sudo npm install -g watchify

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

$ sudo npm update watchify

Update package globally,

$ npm install -g watchify

Git clone:

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

$ sudo  npm install -g ./watchify

watchify@3.9.0 /usr/lib/node_modules/watchify

How to remove watchify package :

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

$ sudo npm uninstall watchify

Basic Information of watchify NPM Package: