terraform/website/source/intro/getting-started/provision.html.md

layout	page_title	sidebar_current
intro	Provision	gettingstarted-provision

Provision

You're now able to create and modify infrastructure. This page introduces how to use provisioners to run basic shell scripts on instances when they're created.

If you're using an image-based infrastructure (perhaps with images created with Packer), then what you've learned so far is good enough. But if you need to do some initial setup on your instances, provisioners let you upload files, run shell scripts, etc.