The kubectl command combined with jq is the Swiss Army Chainsaw of kubernetes management. Some of my more useful kubectl commands:

  watch 'kubectl get pods | column'

  # Delete all failed pods.
  kubectl get pods --field-selector=status.phase=Failed -o json | jq -r '.items[] .metadata.name'  | xargs kubectl delete pod

  # All images running that have the word 'dirty' in their name.
  kubectl get pods -o json | jq -r '..|.containerStatuses?|select(.!=null)|.[].image' | sort | uniq | grep dirty