$ sudo npm install postcss-cli
$ sudo npm install -g postcss-cli

If want to update the postcss-cli package execute the command as below,

$ sudo npm update postcss-cli

Update package globally,

$ npm install -g postcss-cli

Git clone:

$ sudo  git clone https://github.com/rektide/postcss-cli.git

$ sudo  npm install -g ./postcss-cli

postcss-cli@4.1.1 /usr/lib/node_modules/postcss-cli

How to remove postcss-cli package :

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

$ sudo npm uninstall postcss-cli

Basic Information of postcss-cli NPM Package: