Update cheatsheet: add section for interacting with Deployments and Services

Author: notchairmk

content/en/docs/reference/kubectl/cheatsheet.md

@@ -317,6 +317,18 @@ kubectl top pod POD_NAME --containers               # Show metrics for a given p
 kubectl top pod POD_NAME --sort-by=cpu              # Show metrics for a given pod and sort it by 'cpu' or 'memory'
 ```
 
+## Interacting with Deployments and Services
+```bash
+kubectl logs deploy/my-deployment                         # dump Pod logs for a Deployment (single-container case)
+kubectl logs deploy/my-deployment -c my-container         # dump Pod logs for a Deployment (multi-container case)
+
+kubectl port-forward svc/my-service 5000                  # listen on local port 5000 and forward to port 5000 on Service backend
+kubectl port-forward svc/my-service 5000:my-service-port  # listen on local port 5000 and forward to Service target port with name <my-service-port>
+
+kubectl port-forward deploy/my-deployment 5000:6000       # listen on local port 5000 and forward to port 6000 on a Pod created by <my-deployment>
+kubectl exec deploy/my-deployment -- ls                   # run command in first Pod and first container in Deployment (single- or multi-container cases)
+```
+
 ## Interacting with Nodes and cluster
 
 ```bash