In most of the Kubernetes installation instructions on Linux machines, there is such a commands:
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
What is the above command and what does it do? Why there is no official repository for that?
Also like to know about the below command:
kubectl taint nodes --all=true node-role.kubernetes.io/master:NoSchedule-
What happens if we run this commands after installation and what if we don't?