Linux<\/a>\u00a0terminal. There, you can do the same command-line activities you would normally run in a standalone terminal. Also, the OpenShift web console terminal window allows you to work easily with the OpenShift instance and its underlying Kubernetes cluster.<\/p>\n\n\n\nOpenShift has both the\u00a0oc<\/code>\u00a0and\u00a0kubectl<\/code>\u00a0 CLI tools pre-installed and configured to access the underlying Kubernetes cluster within the OpenShift instance. Thus, you can interact with OpenShift and the underlying Kubernetes from the command line.<\/p>\n\n\n\nThe\u00a0oc<\/code>\u00a0CLI tool has much of the same functionality that\u00a0kubectl<\/code>\u00a0provides. However,\u00a0oc<\/code>\u00a0can go a bit further and allow you to execute behavior that is special to OpenShift. For example, you can use\u00a0oc<\/code>\u00a0to install an application into OpenShift without having to negotiate the complexities of application deployment in Kubernetes.<\/p>\n\n\n\nThe following exercises demonstrate how to use the\u00a0oc<\/code>\u00a0and\u00a0kubectl<\/code>\u00a0CLI tools to execute basic tasks from the terminal window\u2019s command line. The exercises also demonstrate the close relationship between OpenShift and Kubernetes.<\/p>\n\n\n\nGet version information<\/h3>\n\n\n\n
Run the following command in the OpenShift terminal to get version information about\u00a0oc<\/code>\u00a0CLI tool:<\/p>\n\n\noc version<\/code><\/span><\/pre>\n\n\n<\/p>\n\n\n\n
You will see output similar to the following:<\/p>\n\n\n
Client<\/span> Version<\/span>: 4.10<\/span>.6<\/span>\n\nServer<\/span> Version<\/span>: 4.10<\/span>.28<\/span>\n\nKubernetes<\/span> Version<\/span>: v1<\/span>.23<\/span>.5<\/span>+012e945<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n<\/p>\n\n\n\n
The results of the\u00a0oc<\/code>\u00a0version<\/code>\u00a0command display the version numbers of the\u00a0oc<\/code>\u00a0CLI client, the server powering the current OpenShift instance and as well as the version number of the underlying instance of Kubernetes used by the cluster.<\/p>\n\n\n\nView resources using oc or kubectl<\/h3>\n\n\n\n
Run the following command in the OpenShift terminal to get a list of pods running in the current instance of OpenShift using the\u00a0oc<\/code>\u00a0CLI tool:\u00a0<\/p>\n\n\noc get<\/span> pods<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n<\/p>\n\n\n\n
You will receive output similar to the following:<\/p>\n\n\n
NAME READY STATUS RESTARTS AGE\n\nworkspace1e8db31dd59c43ef-8585ff4cc-24ww6 2\/2 Running 0 22s<\/code><\/span><\/pre>\n\n\n<\/p>\n\n\n\n
Run the following command in the OpenShift terminal to get a list of pods running in the current instance of OpenShift using the\u00a0kubectl<\/code>\u00a0CLI tool:\u00a0<\/p>\n\n\nkubectl get<\/span> pods<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n<\/p>\n\n\n\n
You will receive output similar to the following:<\/p>\n\n\n
NAME READY STATUS RESTARTS AGE\n\nworkspace1e8db31dd59c43ef-8585ff4cc-24ww6 2\/2 Running 0 22s<\/code><\/span><\/pre>\n\n\n<\/p>\n\n\n\n
Notice that the output from executing\u00a0oc get pods<\/code>\u00a0and\u00a0kubectl get pods<\/code>\u00a0is identical. This is because both\u00a0oc<\/code>\u00a0and\u00a0kubectl<\/code>\u00a0are querying the same underlying Kubernetes cluster to get a list of pods. This is direct evidence of the tight relationship between OpenShift and Kubernetes.\u00a0<\/p>\n\n\n\nRemember, OpenShift is a layer of components that \u201csit on top\u201d of an underlying Kubernetes cluster. The important thing to understand is that the\u00a0oc<\/code>\u00a0CLI tool provides functionality available in the\u00a0kubectl<\/code>\u00a0CLI tool. In many cases, you can use\u00a0oc<\/code>\u00a0and\u00a0kubectl<\/code>\u00a0interchangeably.<\/p>\n\n\n\nSummary<\/h3>\n\n\n\n
In this lesson, you learned how to access the terminal window embedded in the OpenShift web console. Also, you learned how to use the terminal window to execute commands using the\u00a0oc<\/code>\u00a0and\u00a0kubectl<\/code>\u00a0CLI tools. You executed both\u00a0oc get pods<\/code>\u00a0and\u00a0kubectl get pods<\/code>\u00a0to list the same set of pods running in the Kubernetes cluster that\u2019s foundational to OpenShift.<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"
In this lesson, you will learn how to access the terminal window within the Red Hat OpenShift web console and use it to work with various OpenShift and Kubernetes resources… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[5153],"tags":[],"class_list":["post-50047","post","type-post","status-publish","format-standard","hentry","category-openshift"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/50047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=50047"}],"version-history":[{"count":2,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/50047\/revisions"}],"predecessor-version":[{"id":59094,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/50047\/revisions\/59094"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=50047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=50047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=50047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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<\/figure>\n\n\n\n