snap install kubeadm

error: This revision of snap "kubeadm" was published using classic confinement and thus may perform
      arbitrary system changes outside of the security sandbox that snaps are usually confined to,
      which may put your system at risk.
      If you understand and want to proceed repeat the command including --classic.

• kubeadm [ init | token | config | reset | version | upgrade | join | --help ]
• snap install