I run kubectl delete with --all flag. This command deleted all namespace on my cluster. (I couldn't see any namespace on K8S Dashboard) So How can I recover all these deleted namespace ?

And is it possible to restore data on namespance ?

➜ kubectl delete ns --all
warning: deleting cluster-scoped resources, not scoped to the provided namespace
namespace "1xx" deleted
namespace "2xx" deleted
namespace "3xx" deleted
namespace "4xx" deleted
namespace "5xx" deleted
namespace "6xx" deleted
namespace "7xx" deleted