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

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

$ sudo npm update less-plugin-clean-css

Update package globally,

$ npm install -g less-plugin-clean-css

Git clone:

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

$ sudo  npm install -g ./less-plugin-clean-css

less-plugin-clean-css@1.5.1 /usr/lib/node_modules/less-plugin-clean-css

How to remove less-plugin-clean-css package :

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

$ sudo npm uninstall less-plugin-clean-css

Basic Information of less-plugin-clean-css NPM Package: