If you are upgrading from a previous version of Harbor, you might need to update the configuration file and migrate your data to fit the database schema of the later version. For information about upgrading, see [Upgrading Harbor](../administration/upgrade/_index.md).
Before you install Harbor, you can test its functionality on a demo server that the Harbor team has made available. For information, see [Test Harbor with the Demo Server](demo-server.md).
You can use Harbor with different 3rd party replication adapters, OIDC adapters, and scanner adapters. For information about the supported adapters, see the [Harbor Compatibility List](harbor-compatibility-list.md).
You can run a script that deploys Harbor to Ubuntu 18.04 with a single command. For information, see [Deploy Harbor with the Quick Installation Script](quick-install-script.md).
You can also use Helm to install Harbor on a Kubernetes cluster, to make it highly available. For information about installing Harbor with Helm on a Kubernetes cluster, see [Deploying Harbor with High Availability via Helm](harbor-ha-helm.md).
For information about how manage your deployed Harbor instance, see [Reconfigure Harbor and Manage the Harbor Lifecycle](reconfigure-manage-lifecycle.md).
By default, Harbor uses its own private key and certificate to authenticate with Docker. For information about how to optionally customize your configuration to use your own key and certificate, see [Customize the Harbor Token Service](customize-token-service.md).
After installation, you perform configuration operations in the Harbor interface. However, Harbor also provides a command line interface (CLI) that allows yoy to [Configure Harbor User Settings at the Command Line](configure-user-settings-cli.md).
