How to use the command kubectl in Kubernetes

[root@xtwj89 ~]# kubectl help run
Create and run a particular image in a pod.

Examples:
  # Start a nginx pod.
  kubectl run nginx --image=nginx
  
  # Start a hazelcast pod and let the container expose port 5701.
  kubectl run hazelcast --image=hazelcast/hazelcast --port=5701
  
  # Start a hazelcast pod and set environment variables "DNS_DOMAIN=cluster" and "POD_NAMESPACE=default" in the
container.
  kubectl run hazelcast --image=hazelcast/hazelcast --env="DNS_DOMAIN=cluster" --env="POD_NAMESPACE=default"
  
  # Start a hazelcast pod and set labels "app=hazelcast" and "env=prod" in the container.
  kubectl run hazelcast --image=hazelcast/hazelcast --labels="app=hazelcast,env=prod"
  
  # Dry run. Print the corresponding API objects without creating them.
  kubectl run nginx --image=nginx --dry-run=client
  
  # Start a nginx pod, but overload the spec with a partial set of values parsed from JSON.
  kubectl run nginx --image=nginx --overrides='{ "apiVersion": "v1", "spec": { ... } }'
  
  # Start a busybox pod and keep it in the foreground, don't restart it if it exits.
  kubectl run -i -t busybox --image=busybox --restart=Never
  
  # Start the nginx pod using the default command, but use custom arguments (arg1 .. argN) for that command.
  kubectl run nginx --image=nginx -- <arg1> <arg2> ... <argN>
  
  # Start the nginx pod using a different command and custom arguments.
  kubectl run nginx --image=nginx --command -- <cmd> <arg1> ... <argN>

Options:
      --allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in
the template. Only applies to golang and jsonpath output formats.
      --attach=false: If true, wait for the Pod to start running, and then attach to the Pod as if 'kubectl attach ...'
were called.  Default false, unless '-i/--stdin' is set, in which case the default is true. With '--restart=Never' the
exit code of the container process is returned.
      --cascade=true: If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a
ReplicationController).  Default true.
      --command=false: If true and extra arguments are present, use them as the 'command' field in the container, rather
than the 'args' field which is the default.
      --dry-run='none': Must be "none", "server", or "client". If client strategy, only print the object that would be
sent, without sending it. If server strategy, submit server-side request without persisting the resource.
      --env=[]: Environment variables to set in the container.
      --expose=false: If true, service is created for the container(s) which are run
  -f, --filename=[]: to use to replace the resource.
      --force=false: If true, immediately remove resources from API and bypass graceful deletion. Note that immediate
deletion of some resources may result in inconsistency or data loss and requires confirmation.
      --grace-period=-1: Period of time in seconds given to the resource to terminate gracefully. Ignored if negative.
Set to 1 for immediate shutdown. Can only be set to 0 when --force is true (force deletion).
      --hostport=-1: The host port mapping for the container port. To demonstrate a single-machine container.
      --image='': The image for the container to run.
      --image-pull-policy='': The image pull policy for the container. If left empty, this value will not be specified
by the client and defaulted by the server
  -k, --kustomize='': Process a kustomization directory. This flag can't be used together with -f or -R.
  -l, --labels='': Comma separated labels to apply to the pod(s). Will override previous values.
      --leave-stdin-open=false: If the pod is started in interactive mode or with stdin, leave stdin open after the
first attach completes. By default, stdin will be closed after the first attach completes.
      --limits='': The resource requirement limits for this container.  For example, 'cpu=200m,memory=512Mi'.  Note that
server side components may assign limits depending on the server configuration, such as limit ranges.
  -o, --output='': Output format. One of:
json|yaml|name|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-file.
      --overrides='': An inline JSON override for the generated object. If this is non-empty, it is used to override the
generated object. Requires that the object supply a valid apiVersion field.
      --pod-running-timeout=1m0s: The length of time (like 5s, 2m, or 3h, higher than zero) to wait until at least one
pod is running
      --port='': The port that this container exposes.
      --quiet=false: If true, suppress prompt messages.
      --record=false: Record current kubectl command in the resource annotation. If set to false, do not record the
command. If set to true, record the command. If not set, default to updating the existing annotation value only if one
already exists.
  -R, --recursive=false: Process the directory used in -f, --filename recursively. Useful when you want to manage
related manifests organized within the same directory.
      --requests='': The resource requirement requests for this container.  For example, 'cpu=100m,memory=256Mi'.  Note
that server side components may assign requests depending on the server configuration, such as limit ranges.
      --restart='Always': The restart policy for this Pod.  Legal values [Always, OnFailure, Never].  If set to 'Always'
a deployment is created, if set to 'OnFailure' a job is created, if set to 'Never', a regular pod is created. For the
latter two --replicas must be 1.  Default 'Always', for CronJobs `Never`.
      --rm=false: If true, delete resources created in this command for attached containers.
      --save-config=false: If true, the configuration of current object will be saved in its annotation. Otherwise, the
annotation will be unchanged. This flag is useful when you want to perform kubectl apply on this object in the future.
      --serviceaccount='': Service account to set in the pod spec.
  -i, --stdin=false: Keep stdin open on the container(s) in the pod, even if nothing is attached.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The
template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
      --timeout=0s: The length of time to wait before giving up on a delete, zero means determine a timeout from the
size of the object
  -t, --tty=false: Allocated a TTY for each container in the pod.
      --wait=false: If true, wait for resources to be gone before returning. This waits for finalizers.

Usage:
  kubectl run NAME --image=image [--env="key=value"] [--port=port] [--dry-run=server|client] [--overrides=inline-json]
[--command] -- [COMMAND] [args...] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@xtwj89 ~]#