One liner to copy all secrets from one namespace to another in Kubernetes

If you ever need to copy all secrets from one namespace to another, execute the following one liner:

$ for i in `kubectl get secrets | awk '{print $1}'`; do  kubectl get secret $1 -n <source-namespace> -o yaml | sed s/"namespace: <source-namespace>"/"namespace: <target-namespace>"/ | kubectl apply -n <target-namespace> -f -  ; done