Master kubectl: Essential Commands and Tips for Managing Kubernetes

1. kubectl syntax

kubectl [command] [type] [NAME] [flags]

command : subcommand for operating Kubernetes resources, e.g., create, delete, describe, get, apply, etc.

TYPE : resource type, case‑sensitive, can be singular, plural, or abbreviated. Examples:

kubectl get pod pod1

kubectl get pods pod1

kubectl get po pod1

NAME : name of the resource; if omitted, all objects of the specified TYPE are listed.

flags : optional parameters for subcommands, e.g., -s to specify the API server URL.

kubectl resource types and abbreviations

You can operate on multiple resources in a single command by specifying multiple TYPE and NAME pairs.

Examples of multiple pods

kubectl get pods pod1 pod2

Example of multiple object types

kubectl get pod/pod1 rc/rc1

Applying multiple YAML files

kubectl get pod -f pod1.yaml -f pod2.yaml

kubectl create -f pod1.yaml -f rc1.yaml -f service1.yaml

kubectl subcommands

kubectl offers a rich set of subcommands for creating, deleting, viewing, modifying, configuring, and running resources. Detailed subcommand lists are typically presented in reference tables.

kubectl common parameters

kubectl output formats

The output format is controlled with the -o flag.

kubectl operation examples

Create a service and replication controller from YAML files: kubectl create -f my-service.yaml -f my-rc.yaml Create all resources defined in a directory: kubectl create -f <directory> List all pods: kubectl get pods List replication controllers and services: kubectl get rc,service Describe a node: kubectl describe nodes <node-name> Describe a pod: kubectl describe pods/<pod-name> Describe pods managed by a replication controller: kubectl describe pods <rc-name> Delete a pod defined in a YAML file: kubectl delete -f pod.yaml Delete all pods and services with a specific label: kubectl delete pods,services -l name=<label-name> Delete all pods: kubectl delete pods --all Execute a command in a pod (default first container): kubectl exec <pod-name> date Execute a command in a specific container: kubectl exec <pod-name> -c <container-name> date Open an interactive shell in a container: kubectl exec -it <pod-name> -c <container-name> /bin/bash View pod logs: kubectl logs <pod-name> Follow pod logs (like tail -f):

kubectl logs -f <pod-name> -c <container-name>