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Chapter 6. Usage of oc and kubectl commands

Kubernetes' command line interface (CLI), kubectl, can be used to run commands against a Kubernetes cluster. Because OpenShift Container Platform is a certified Kubernetes distribution, you can use the supported kubectl binaries that ship with OpenShift Container Platform, or you can gain extended functionality by using the oc binary.

6.1. The oc binary
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The oc binary offers the same capabilities as the kubectl binary, but it extends to natively support additional OpenShift Container Platform features, including:

  • Full support for OpenShift Container Platform resources

    Resources such as DeploymentConfigs, BuildConfigs, Routes, ImageStreams, and ImageStreamTags are specific to OpenShift Container Platform distributions, and build upon standard Kubernetes primitives.

  • Authentication

    The oc binary offers a built-in login command that allows authentication and enables you to work with OpenShift Container Platform projects, which map Kubernetes namespaces to authenticated users. See Understanding authentication for more information.

  • Additional commands

    The additional command oc new-app, for example, makes it easier to get new applications started using existing source code or pre-built images. Similarly, the additional command oc new-project makes it easier to start a project that you can switch to as your default.

6.2. The kubectl binary
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The kubectl binary is provided as a means to support existing workflows and scripts for new OpenShift Container Platform users coming from a standard Kubernetes environment, or for those who prefer to use the kubectl CLI. Existing users of kubectl can continue to use the binary to interact with Kubernetes primitives, with no changes required to the OpenShift Container Platform cluster.

For more information, see the kubectl docs.

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