Install, License, and Upgrade Configuration
The OcNOS Installation Guide provides instructions for installing and licensing OcNOS. It includes the following steps:
•	Download the OcNOS installation image.
•	Download an OcNOS license.
•	Install OcNOS:
•	From an FTP, HTTP, or TFTP server
•	From a USB stick 
•	Using Zero Touch Provisioning
•	Set up a license
OcNOS supports both patch upgrades and full upgrades:
•	A patch upgrade updates to a new OcNOS image with bug fixes but without kernel changes.
•	A full upgrade updates to a new OcNOS ONIE image with bug fixes, including kernel changes.
The OcNOS Installation Guide also covers procedures for upgrading existing OcNOS installations by either:
•	Installing a new OcNOS version over an existing OcNOS version saves the existing configuration files.
•	Installing a fresh OcNOS version is destructive and removes existing configuration files, SSH keys, and trial licenses. Users must manually restore these items from backups as needed.