(formerly known as kubectl-enter)
Start a root shell in the node's host OS running.
curl -LO https://github.com/kvaps/kubectl-node-shell/raw/master/kubectl-node_shell
chmod +x ./kubectl-node_shell
sudo mv ./kubectl-node-shell /usr/local/bin/kubectl-node_shell
kubectl node-shell <node>
You need to be able to start privileged containers for that.