The connection to the server <host>:6443 was refused - did you specify the right host or port?

[Joseph_John]

Actually , the issue is something else, was able to solve it
I posted how I solved by

@Joseph_John

now I did the changes, [ I am pasting it here]

itsupport@k8s-master:/etc/containerd$ diff config.toml config.toml-ORG 
125c125
<             SystemdCgroup = true
---
>             SystemdCgroup = false
itsupport@k8s-master:/etc/containerd