$ sudo npm install apn
$ sudo npm install -g apn

If want to update the apn package execute the command as below,

$ sudo npm update apn

Update package globally,

$ npm install -g apn

Git clone:

$ sudo  git clone https://github.com/rektide/apn.git

$ sudo  npm install -g ./apn

apn@2.1.5 /usr/lib/node_modules/apn

How to remove apn package :

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

$ sudo npm uninstall apn

Basic Information of apn NPM Package: