$ sudo npm install firebase-admin
$ sudo npm install -g firebase-admin

If want to update the firebase-admin package execute the command as below,

$ sudo npm update firebase-admin

Update package globally,

$ npm install -g firebase-admin

Git clone:

$ sudo  git clone https://github.com/rektide/firebase-admin.git

$ sudo  npm install -g ./firebase-admin

firebase-admin@5.5.1 /usr/lib/node_modules/firebase-admin

How to remove firebase-admin package :

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

$ sudo npm uninstall firebase-admin

Basic Information of firebase-admin NPM Package: