Docs/Drafts/SoftwareManagementGuide/UpdateWithYum

6. Updating Your System with yum
Use the update option to upgrade all of your Fedora system software to the latest version with one operation.

To perform a full system update, type this command:

At the prompt, enter the root password.

6.1. Automatically Updating Your System
The  package supplied with Fedora includes scripts to perform full system updates every day. To activate automatic daily updates, enter this command:

At the prompt, enter the password for the root account.