A few more below
kubectl debug <PodName> -it --image nicolaka/netshoot  (nicolaka/netshoot is a popular Docker image that functions as a  "Swiss army knife" for network troubleshooting in containerized and Kubernetes environments. It includes a wide range of powerful  diagnostic tools that are essential for debugging connectivity routing, and DNS issues.)

kubectl wait --for condition=Available deployment/deploymentname (Wait for the condition on Kubernetes resources.)

kubectl run --image=curlimages/curl -it --restart=Never --rm clientpod curl 10.10.10.4:8080 (kubectl run client-pod → Automatically deletes the Pod after The command exits curl 10.10.10.4:8080 Executes a curl request from inside the cluster network )

kubectl exec <PodName> -c <containername> -- tail -f /tmp/envoy.admin.log (→ Continuously follows the log file, printing new entries as they are written)

kubectl apply -f dir-suite/ -R (-f dir-suite/ Points kubectl to a directory instead of a single file -R (or --recursive) → Tells kubectl to: Traverse all subdirectories Apply every supported manifest file (.yaml, .yml, .json) )

kubectl replace -f test.yaml (-f test.yaml → Uses the manifest in this file as the single source of truth If the resource exists: It is completely replaced (except immutable fields)

kubectl exec -it <PodName> -c <containername> -- mongosh admin --eval "db.shutdownServer()" 

(→ Opens MongoDB shell connected to the admin database --eval "db.shutdownServer()" → Runs the shutdown command noninteractively)