cycle up/down kubectl context

kube-context-switch.sh

kd () {
  kubectl config use-context $(
    kubectl config get-contexts | awk 'NR == 2 { first=$1 } { if ($1 == "*") { if(getline == 1) { print $2 } else { print first }}}'
  )
}
ku () {
  kubectl config use-context $(
    kubectl config get-contexts | awk 'BEGIN {previous=0} NR>1 { { if ($1 == "*") { if (previous!=0) {print previous} else { while (getline == 1){} print $2 } } } { previous=$2 } }'
  )
}