$ sudo npm install express-validator
$ sudo npm install -g express-validator

If want to update the express-validator package execute the command as below,

$ sudo npm update express-validator

Update package globally,

$ npm install -g express-validator

Git clone:

$ sudo  git clone https://github.com/rektide/express-validator.git

$ sudo  npm install -g ./express-validator

express-validator@4.3.0 /usr/lib/node_modules/express-validator

How to remove express-validator package :

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

$ sudo npm uninstall express-validator

Basic Information of express-validator NPM Package: