$ sudo npm install clean-css
$ sudo npm install -g clean-css

If want to update the clean-css package execute the command as below,

$ sudo npm update clean-css

Update package globally,

$ npm install -g clean-css

Git clone:

$ sudo  git clone https://github.com/rektide/clean-css.git

$ sudo  npm install -g ./clean-css

clean-css@4.1.9 /usr/lib/node_modules/clean-css

How to remove clean-css package :

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

$ sudo npm uninstall clean-css

Basic Information of clean-css NPM Package: