Kubectl

sudo curl -fsSLo /etc/apt/keyrings/kubernetes-archive-keyring.gpg\
 https://packages.cloud.google.com/apt/doc/apt-key.gpg

cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list >/dev/null
deb [arch=$(dpkg --print-architecture)\
 signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg]\
 https://apt.kubernetes.io/ kubernetes-xenial main
EOF

sudo apt update
sudo apt install kubectl

Kubeconfig

Kubernetes components like kubelet, kube-controller-manager, or kubectl use the kubeconfig file to interact with the Kubernetes API. Usually, the kubectl or oc commands use the kubeconfig file.

The kubeconfig file's default location for kubectl or oc is the ~/.kube directory. Instead of using the full kubeconfig name, the file is just named config. The default location of the kubeconfig file is ~/.kube/config. There are other ways to specify the kubeconfig location, such as the KUBECONFIG environment variable or the kubectl --kubeconfig parameter.

The kubeconfig file is a YAML file containing groups of clusters, users, and contexts.

• A cluster is a Kubernetes or OpenShift cluster.
• A user is a credential used to interact with the Kubernetes API.
• A context is a combination of a cluster and a user. Every time you execute an oc or kubectl command, you reference a context inside kubeconfig.

export KUBECONFIG=$HOME/.kube/chorke-academia-kubeconfig.yaml
chmod 600 $HOME/.kube/chorke-academia-kubeconfig.yaml

Knowledge

kubectl get deployment -A kubectl get services -A kubectl get events -A kubectl get pods -A	kubectl get configmap -A kubectl get secret -A helm list	kubectl config --kubeconfig=./demo-config view --minify kubectl config view --minify kubectl config view
sudo ss -tulwn | grep LISTEN sudo ss -tulpn | grep LISTEN sudo ss -tulpn | grep LISTEN | grep sshd sudo ss -tulpn | grep LISTEN | grep minio sudo ss -tulpn | grep LISTEN | grep resolve	sudo lsof -i -P -n | grep LISTEN

References

Kube » Configure Access to Multiple Clusters Kube » Playground » Play with K8s Kube » Playground » Killercoda Kube » Config Kube » Install
Docker on Windows Docker Compose Kubernetes Minikube ZA Proxy Docker JMeter Helm Istio	Snyk Vulnerability DB Sysdig