Kubernetes and Docker

Kubernetes Commands Cheat Sheet

Here is a cheat sheet of 20 frequently used Kubernetes commands, along with a detailed explanation for each of them.

Command	Explanation
kubectl get nodes	List all nodes in the cluster.
kubectl get pods	List all pods in the default namespace.
kubectl get pods -n my-namespace	List all pods in a specific namespace.
kubectl get pods -o jsonpath={.items[*].metadata.name}	List the names of all pods using jsonpath.
kubectl describe node my-node	Detailed information about a specific node.
kubectl describe pod my-pod	Detailed information about a specific pod.
kubectl logs my-pod	Print the logs for a specific pod.
kubectl exec my-pod -- date	Execute a command in a specific pod (e.g., print current date).
kubectl run my-pod --image=my-image	Run a specific image in a new pod.
kubectl delete pod my-pod	Delete a specific pod.
kubectl create -f my-config.yaml	Create resources defined in a specific YAML file.
kubectl apply -f my-config.yaml	Apply changes to resources defined in a specific YAML file.
kubectl delete -f my-config.yaml	Delete resources defined in a specific YAML file.
kubectl get services	List all services in the default namespace.
kubectl get services -n my-namespace	List all services in a specific namespace.
kubectl get deployments	List all deployments in the default namespace.
kubectl get deployments -n my-namespace	List all deployments in a specific namespace.
kubectl scale --replicas=3 deployment/my-deployment	Scale a deployment to 3 replicas.
kubectl rollout status deployment/my-deployment	Check the rollout status of a specific deployment.
kubectl rollout undo deployment/my-deployment	Roll back the last update to a specific deployment.

These are common commands that will help you manage your Kubernetes cluster. Please consult the Kubernetes documentation for a more detailed list and for commands specific to your use case.

Docker Commands Cheat Sheet

Command	Explanation
docker run image	Run a Docker container from an image.
docker run -it image	Run an image in interactive mode with a terminal attached.
docker run -d image	Run an image in the background (detached mode).
docker run -p 8080:80 image	Run an image and map host port 8080 to container port 80.
docker run -v /host/dir:/container/dir image	Run an image with a host directory mounted into the container.
docker ps	List all running Docker containers.
docker ps -a	List all Docker containers, both running and stopped.
docker stop container_id	Stop a running Docker container.
docker rm container_id	Remove a Docker container.
docker rmi image	Remove a Docker image.
docker images	List all Docker images.
docker pull image	Pull a Docker image from a registry.
docker push image	Push a Docker image to a registry.
docker build -t image .	Build a Docker image from a Dockerfile in the current directory.
docker exec -it container_id command	Execute a command in a running Docker container.
docker logs container_id	Get the logs from a Docker container.
docker network ls	List all Docker networks.
docker volume ls	List all Docker volumes.
docker login	Log in to a Docker registry.
docker tag image new_tag	Tag a Docker image with a new tag.
docker history image	Show the history of an image, including the commands that were run to build it.
docker inspect container_id	Display detailed information in JSON format for a running container.
docker search term	Search the Docker Hub for images.
docker save -o file.tar image	Save an image to a tar archive.
docker load -i file.tar	Load an image from a tar archive.
docker top container_id	Display the running processes in a container.
docker diff container_id	Show file system changes in a container.
docker cp container_id:/file/path /host/path	Copy files/folders from a container to the host.
docker commit container_id new_image	Create a new image from a container's changes.
docker port container_id	Show port mapping for a container.
docker stats container_id	Show a live stream of container(s) resource usage statistics.
docker wait container_id	Block until a container stops, then print its exit code.
docker update container_id	Update configuration of one or more containers.
docker system df	Display detailed information on space usage within Docker.
docker system prune	Remove all unused Docker objects.
docker container ls	List all running containers. Similar to docker ps.
docker container rm container_id	Remove one or more containers. Similar to docker rm.
docker image ls	List all images. Similar to docker images.
docker image rm image_id	Remove one or more images. Similar to docker rmi.
docker network create network_name	Create a new network.
docker volume create volume_name	Create a new volume.
docker network connect network_name container_id	Connect a network to a container.
docker network disconnect network_name container_id	Disconnect a network from a container.
docker volume inspect volume_name	Display detailed information on a specific volume.
docker image inspect image_name	Display detailed information on a specific image.
docker container start container_id	Start one or more stopped containers.
docker container stop container_id	Stop one or more running containers.
docker container pause container_id	Pause all processes within one or more containers.
docker container unpause container_id	Unpause all processes within one or more containers.
docker container restart container_id	Restart one or more containers.
docker container kill container_id	Kill one or more running containers.
docker container attach container_id	Attach local standard input, output, and error streams to a running container.
docker container prune	Remove all stopped containers.
docker image prune	Remove unused images.
docker container export container_id -o file.tar	Export a container's filesystem as a tar archive.
docker container commit container_id	Create a new image from a container's changes.
docker container rename old_name new_name	Rename a container.
docker container run -it --rm --name container_name image	Run a command in a new container, interactively, remove the container when it stops, and name it.
docker container exec -it container_id command	Run a command in a running container, interactively.
docker buildx build --platform linux/amd64,linux/arm64 -t image .	Build an image for multiple platforms using buildx.
docker buildx ls	List builder instances.
docker buildx use builder_name	Set the current builder instance.
docker buildx create --use	Create a new builder instance and switch to it.
docker buildx inspect --bootstrap	Inspect current builder instance.
docker buildx rm builder_name	Remove a builder instance.
docker node ls	List nodes in a swarm.
docker swarm init	Initialize a swarm.
docker stack ls	List stacks.
docker stack deploy -c docker-compose.yml stack_name	Deploy a new stack or update an existing stack.
docker stack rm stack_name	Remove a stack.
docker secret ls	List secrets.
docker secret create secret_name secret_data	Create a secret from a file or STDIN as a single string.
docker secret rm secret_name	Remove one or more secrets.
docker service create --name service_name image	Create a new service.
docker service ls	List services.
docker service rm service_name	Remove one or more services.
docker service scale service_name=num_replicas	Scale one or multiple replicated services.
docker service update service_name	Update a service.
docker service ps service_name	List the tasks of one or more services.
docker service logs service_name	Fetch the logs of a service or task.
docker config ls	List configs.
docker config create config_name file	Create a config from a file or STDIN.
docker config rm config_name	Remove one or more configs.
docker plugin ls	List plugins.
docker plugin install plugin_name	Install a plugin.
docker plugin rm plugin_name	Remove one or more plugins.
docker plugin enable plugin_name	Enable a plugin.
docker plugin disable plugin_name	Disable a plugin.
docker checkpoint ls container_id	List checkpoints.
docker checkpoint create container_id checkpoint_name	Create a checkpoint.
docker checkpoint rm container_id checkpoint_name	Remove a checkpoint.
docker system info	Display system-wide information.
docker system events	Get real time events from the server.
docker trust signer add --key signer_pub_key.pem signer_name repo/image	Add a signer for a repository or image.
docker trust revoke repo/image	Revoke a signed tag.
docker trust inspect --pretty repo/image	Return detailed information about signatures for images.
docker login [options] [server]	Log in to a Docker registry server.
docker logout [server]	Log out from a Docker registry server.
docker manifest create list image[:tag] [image[:tag] ...]	Create a local manifest list for annotating and pushing to a registry.
docker manifest inspect image[:tag]	Display an image's manifest, or a local or remote manifest list.
docker manifest push [options] name[:tag]	Push a manifest list or image index to a registry.
docker manifest annotate name[:tag] image[:tag] [options]	Add additional information to a local image manifest or manifest list.
docker network prune	Remove all unused networks.
docker volume prune	Remove all unused volumes.
docker image save image -o file.tar	Save one or more images to a tar archive.
docker image load -i file.tar	Load an image or repository from a tar archive.
docker image prune -a	Remove all unused images, not just dangling ones.
docker container port container_id	List port mappings for the container, or specify a specific mapping.
docker container diff container_id	Inspect changes to files or directories on a container's filesystem.
docker container top container_id	Display the running processes of a container.
docker container stats [container_id...]	Display a live stream of container(s) resource usage statistics.
docker container exec -it container_id command	Run a command in a running container.
docker network create -d driver_name network_name	Create a network with a specified driver.
docker network rm network_id	Remove one or more networks.
docker network connect network_id container_id	Connect a network to a container.
docker network disconnect network_id container_id	Disconnect a network from a container.
docker volume create volume_name	Create a volume.
docker volume rm volume_name	Remove one or more volumes.
docker volume inspect volume_name	Display detailed information on a specific volume.
docker volume prune	Remove all unused local volumes.
docker node update --availability drain node_id	Update a node's status to 'drain' to prepare for maintenance.
docker node demote node_id	Demote one or more nodes from manager in the swarm.
docker node promote node_id	Promote one or more nodes to manager in the swarm.
docker swarm leave --force	Force swarm to leave even if it is the last manager or that it will break the cluster.
docker swarm join-token worker	Show join command for worker.
docker swarm join-token manager	Show join command for manager.