packer-cn/website/source/docs/provisioners/index.html.md.erb

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---
description: |
Provisioners use builtin and third-party software to install and configure the
machine image after booting.
layout: docs
page_title: Provisioners
sidebar_current: 'docs-provisioners'
---
# Provisioners
Provisioners use builtin and third-party software to install and configure the
machine image after booting. Provisioners prepare the system for use, so common
use cases for provisioners include:
- installing packages
- patching the kernel
- creating users
- downloading application code
These are just a few examples, and the possibilities for provisioners are
endless.