Snap install

snap install hello

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.

snap install kubeadm --classic
snap install kubectl --classic
snap install kube-proxy --classic
snap install kube-scheduler
snap install kube-apiserver
snap install kubelet --classic
snap install docker 

See also

• Snap: snap, snapd, snapctl, snapcraft, snap: [list | install |find | info | services | start| stop | remove | refresh | set | logs ] snapd | snap list | snap version | snap find aws | snap --help ]