kubectl

# To display list of all available commands:
kubectl -h

# To display an explanation of a specific command:
kubectl command_name -h

# To display complete list of supported resources:
kubectl api-resources

# To display an explanation of a specific resource:
kubectl explain resource_name

# To display an explanation of a specific field of resource:
kubectl explain resource_name.field_name

# To display list of global command-line options:
kubectl options

# To set up `kubectl` autocomplete in bash (press Tab to use):
source <(kubectl completion bash)

# To display all resources in all namespaces:
kubectl get all -A

# To order events by `creationTimestamp`:
kubectl get events --sort-by='.metadata.creationTimestamp'