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Differences Between oc and kubectl | CLI Reference | OKD 3.10
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Differences Between oc and kubectl

Why Use oc Over kubectl?

Kubernetes' command line interface (CLI), kubectl, is used to run commands against any Kubernetes cluster. Because OKD runs on top of a Kubernetes cluster, a copy of kubectl is also included with oc, OKD’s command line interface (CLI).

Although there are several similarities between these two clients, this guide’s aim is to clarify the main reasons and scenarios for using one over the other.

Using oc

The oc binary offers the same capabilities as the kubectl binary, but it is further extended to natively support OKD features, such as:

Full support for OpenShift resources

Resources such as DeploymentConfigs, BuildConfigs, routes, ImageStreams, and ImageStreamTags are specific to OpenShift distributions, and not available in standard Kubernetes.

Authentication

The oc binary offers a built-in login command which allows authentication. See developer authentication and configuring authentication for more information.

Additional commands

For example, the additional command new-app makes it easier to get new applications started using existing source code or pre-built images.

Using kubectl

The kubectl binary is provided as a means to support existing workflows and scripts for new OKD users coming from a standard Kubernetes environment. Existing users of kubectl can continue to use the binary with no changes to the API, but should consider upgrading to oc in order to gain the added functionality mentioned in the previous section.

Because oc is built on top of kubectl, converting a kubectl binary to oc is as simple as changing the binary’s name from kubectl to oc.

See Get Started with the CLI for installation and setup instructions.