The directory ~/manifests-16skyz2 exists and is empty. The namespace anatomy-16skyz2 exists and is empty.

1. Generate

kubectl create deploy web --image=nginx:1.27 --dry-run=client -o yaml > ~/manifests-16skyz2/web.yaml
cat ~/manifests-16skyz2/web.yaml

2. Edit

The generator wrote replicas: 1. Change it to 3. Either open the file:

vim ~/manifests-16skyz2/web.yaml

or substitute in place:

sed -i 's/replicas: 1/replicas: 3/' ~/manifests-16skyz2/web.yaml
grep replicas ~/manifests-16skyz2/web.yaml

3. Apply

kubectl apply -f ~/manifests-16skyz2/web.yaml -n anatomy-16skyz2
kubectl get deploy web -n anatomy-16skyz2

READY should reach 3/3.

4. A Service, by hand

Write ~/manifests-16skyz2/web-svc.yaml. It needs apiVersion: v1, kind: Service, a name of web, a selector of app: web (the label the generator put on the Pods) and one port, 80 to 80:

apiVersion: v1
kind: Service
metadata:
  name: web
spec:
  selector:
    app: web
  ports:
    - port: 80
      targetPort: 80

Apply it to the same namespace and confirm it found its Pods:

kubectl apply -f ~/manifests-16skyz2/web-svc.yaml -n anatomy-16skyz2
kubectl describe svc web -n anatomy-16skyz2

The Endpoints: line lists three Pod IPs. If it shows <none>, the selector does not match the Pod labels.