- `kubeadm`: added a new "kubeadm config validate" command that can be used to
  validate any input config file. Use the `--config` flag to pass a config file
  to it. See the command `--help` screen for more information. As a result of adding
  this new command, enhance the validation capabilities of the existing "kubeadm

  certificate. ([#120521](https://github.com/kubernetes/kubernetes/pull/120521), [@SataQiu](https://github.com/SataQiu))
- `kubeadm`: removed leftover disclaimer that could be seen in the `kubeadm init phase certs` command help screen, since the "certs" phase of "init" is no longer alpha. ([#121172](https://github.com/kubernetes/kubernetes/pull/121172), [@SataQiu](https://github.com/SataQiu))
- `kubeadm`: updated warning message when swap space is detected. When swap is