$ sudo npm install gulp-cssnano
$ sudo npm install -g gulp-cssnano

If want to update the gulp-cssnano package execute the command as below,

$ sudo npm update gulp-cssnano

Update package globally,

$ npm install -g gulp-cssnano

Git clone:

$ sudo  git clone https://github.com/rektide/gulp-cssnano.git

$ sudo  npm install -g ./gulp-cssnano

gulp-cssnano@2.1.2 /usr/lib/node_modules/gulp-cssnano

How to remove gulp-cssnano package :

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

$ sudo npm uninstall gulp-cssnano

Basic Information of gulp-cssnano NPM Package: