Download and extract the openshift-install and oc/kubectl binaries into the
helper node
curl -sL https://mirror.openshift.com/pub/openshift-v4/clients/ocp/${OCPVERSION}/openshift-client-linux-${OCPVERSION}.tar.gz | \
sudo tar -C /usr/local/bin -xzf - oc kubectl
# Use https://mirror.openshift.com/pub/openshift-v4/clients/oc/latest/linux/oc.tar.gz for latest oc
# It doesn't include kubectl, though
curl -sL https://mirror.openshift.com/pub/openshift-v4/clients/ocp/${OCPVERSION}/openshift-install-linux-${OCPVERSION}.tar.gz | \
sudo tar -C /usr/local/bin -xzf - openshift-install
sudo chmod 755 /usr/local/bin/{oc,kubectl,openshift-install}