Trying with --ignore-preflight-errors=all ubuntu@ip-172-31-38-142:~$ sudo kubeadm join --token ca3f65.9e6258b8d6109e8f --discovery-token-ca-cert-hash --ignore-preflight-errors=all 172.31.19.230:6443 [preflight] Running pre-flight checks. [preflight] Some fatal errors occurred: [ERROR ...