I was a little confused with below command:

kubectl run busybox --image=busybox --restart=Never -o yaml --dry-run -- /bin/sh -c 'echo hello;sleep 3600'

YAML:

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: busybox
  name: busybox
spec:
  containers:
  - args:
    - /bin/sh
    - -c
    - echo hello;sleep 3600
    image: busybox
    name: busybox
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Never
status: {}

I know if we don't specify parameter --command, then parameters after -- will be treated as arguments.

But I wanted to know, how /bin/sh -c "echo hello;sleep 3600" was working in case of arguments? According to Kubernetes documentation(https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#notes), If we specify only arguments in a POD then docker EntryPoint will be used as EntryPoint command. So the resultant command which will be executed in the docker image will be Docker EntryPoint + kubectl arguments.

As Busybox DockerFile does not contain any EntryPoint(https://github.com/docker-library/busybox/blob/master/musl/Dockerfile), so arguments specified in the kubectl command will only be used, so the command will look like:

/bin/sh -c 'echo hello;sleep 3600'

And if we specify --command, then according to Kubernetes documentation, DockerFile arguments(CMD) and command(EntryPoint) both will be overridden with command specified in the kubectl command, so it will look similar to above:

/bin/sh -c 'echo hello;sleep 3600'

So it would be same in the end.