Since we started the node application manually in the Terminal, closing the SSH connection or hitting Ctrl + C on the keyboard will stop the node process, and therefore our Hello World application will not work anymore. Amazon Linux, unlike a standard Red Hat-based distribution, comes with a system called upstart.
This is fairly easy to use and provides a couple of extra features that traditional System-V bootup scripts don't have, such as the ability to respawn a process that died unexpectedly. To add an upstart configuration, you need to create a file inside /etc/init on the EC2 instance.
Here is the code to insert it in /etc/init/helloworld.conf:
description "Hello world Daemon"# Start ...
