Kubernetes setup Initialize Master with kubeadm command

I have an issue with getting my master initialize i ran the command below using network cidr- flannel & apiserver with my static IP address
$ sudo kubeadm init --pod-network-cidr= --apiserver-advertise-address=

Here is my result below
osboxes@kubemaster:~ sudo kubeadm init --pod-network-cidr= --apiserver-advertise-address= [sudo] password for osboxes: W0526 04:46:30.641889 3319 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io] [init] Using Kubernetes version: v1.18.3 [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 [preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...` To see the stack trace of this error execute with --v=5 or higher osboxes@kubemaster:~

you should have 2 CPUs or more. Check the prerequisite https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#before-you-begin