If using proxy $ https_proxy=http://proxy.company.tld:3128 wget https://raw.githubusercontent.com/pockost/kubeadm-prerequisite/master/kubeadm-prerequisite.sh $ bash ./kubeadm-prerequisite.sh
Otherwise $ wget https://raw.githubusercontent.com/pockost/kubeadm-prerequisite/master/kubeadm-prerequisite.sh $ bash ./kubeadm-prerequisite.sh