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Chapter 3. Preparing for Installation

3.1. Upgrade or Install?
3.2. Downloading Boot and Installation Images
3.3. Verifying the Downloaded Image
3.3.1. Verifying checksums on Windows systems
3.3.2. Verifying checksums on Linux and OSX systems
3.4. Preparing Boot Media
This chapter describes the steps you need take before you begin the installation. Not every step must be strictly followed - for example, if you plan to use the default installation settings, you do not need to gather system information such as disk device labels/UUIDs or network information such as the system's IP address. However, you should still go through this chapter, as it also describes the available types of installation media and how to prepare boot media and installation sources.

3.1. Upgrade or Install?

If you already have Fedora installed and want to upgrade your installation to the current version, there are two basic ways to do so:
Automatic upgrade using dnf system upgrade
The preferred way to upgrade your system is an automatic upgrade using the dnf system upgrade utility. For information on performing an automatic upgrade, see Fedora Wiki dnf system upgrade.
Manual Reinstallation
You can upgrade to the latest version of Fedora manually instead of relying on dnf system upgrade. This involves booting the installer as if you were performing a clean installation, letting it detect your existing Fedora system, and overwriting the root partition while preserving data on other partitions and volumes. The same process can also be used to reinstall the system, if you need to. For detailed information, see Section 12.1, “Manual System Upgrade or Reinstallation”.


Always back up your data before performing an upgrade or reinstalling your system, no matter which method you choose.