$ sudo npm install flags
$ sudo npm install -g flags

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

$ sudo npm update flags

Update package globally,

$ npm install -g flags

Git clone:

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

$ sudo  npm install -g ./flags

flags@0.1.3 /usr/lib/node_modules/flags

How to remove flags package :

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

$ sudo npm uninstall flags

Basic Information of flags NPM Package: