How to use the oc CLI client
The oc client binary can be downloaded from the OpenShift Web Console by clicking on the question mark (top right) and choose
Command line tools.
There you can find various binaries to work with OpenShift from the command line.
To login to the OpenShift cluster, you need to get the login command from the OpenShift web console by clicking on your name (top right) and choose
Copy login command.
Once you have the oc client binary on your computer and have logged in to OpenShift, you can type
oc help to get information what you can do with it.
The upstream documentation also provides good help: Getting started with the OpenShift CLI.