How to check whether my user data passing to EC2 instance working or not?

Question

While creating new AWS EC2 instance using EC2 command line API, i am passing some user data to new instance.

Now how i came to know whether that user data executed or no

Answer 1

You can verify using following steps

1. SSH on launch EC2 instance
2. Check log of your user data script in
   • /var/log/cloud-init.log and
   • /var/log/cloud-init-output.log

You can see all log's of your user data script and it will also create /etc/cloud folder.