$ sudo npm install postcss-merge-rules
$ sudo npm install -g postcss-merge-rules

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

$ sudo npm update postcss-merge-rules

Update package globally,

$ npm install -g postcss-merge-rules

Git clone:

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

$ sudo  npm install -g ./postcss-merge-rules

postcss-merge-rules@2.1.2 /usr/lib/node_modules/postcss-merge-rules

How to remove postcss-merge-rules package :

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

$ sudo npm uninstall postcss-merge-rules

Basic Information of postcss-merge-rules NPM Package: