kubectl CLI installation and configuration in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is kubectl in Kubernetes?

kubectl is a command-line tool used to interact with Kubernetes clusters. It lets you create, update, delete, and manage Kubernetes resources.

beginner

How do you install kubectl on a Linux system using curl?

Run these commands:<br>curl -LO https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl<br>chmod +x kubectl<br>sudo mv kubectl /usr/local/bin/

intermediate

What is the purpose of the kubectl config command?

kubectl config manages the configuration file that stores cluster, user, and context information. It helps kubectl know which cluster to talk to and with what credentials.

beginner

What file does kubectl use by default to store cluster connection info?

By default, kubectl uses the ~/.kube/config file to store cluster, user, and context details.

beginner

How do you check the current context (cluster and user) kubectl is using?

Run kubectl config current-context. It shows the active cluster and user setting.

Which command installs kubectl on Linux using curl?

A curl -LO https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl

B apt-get install kubectl

C yum install kubectl

D curl https://kubectl.io/install.sh

Option A downloads the official kubectl binary for Linux from the Kubernetes release site.

Where does kubectl store its default configuration file?

A /etc/kubernetes/config

B ~/.kube/config

C /usr/local/bin/kubectl.conf

D /var/lib/kube/config

The default config file is located at ~/.kube/config in the user's home directory.

What does the command kubectl config current-context show?

A The current Kubernetes cluster and user context

B The version of kubectl installed

C The list of all pods in the cluster

D The status of the Kubernetes nodes

This command shows which cluster and user kubectl is currently set to use.

Which of these is NOT a valid way to configure kubectl?

A Running <code>kubectl config use-context</code>

B Editing the <code>~/.kube/config</code> file manually

C Running <code>kubectl install config</code>

D Using <code>kubectl config set-context</code>

There is no kubectl install config command; configuration is managed with kubectl config subcommands or by editing the config file.

After downloading the kubectl binary, what is the next step to make it executable on Linux?

A Run <code>kubectl config set</code>

B Run <code>kubectl install</code>

C Run <code>sudo apt-get update</code>

D Run <code>chmod +x kubectl</code>

You must make the binary executable with chmod +x before moving it to a system path.

Explain the steps to install and configure kubectl on a new Linux machine.

Think about downloading, permissions, placement, and configuration.

Describe how kubectl knows which Kubernetes cluster to connect to.

Focus on the config file and context concept.