How to diff two large JSON files with out-of-order keys
·2 mins
diff gives you noise. jq -S, dyff, and jd give you the actual semantic difference.Debugging
How to fix 'ImagePullBackOff' without leaving kubectl
·2 mins
The four causes of ImagePullBackOff in Kubernetes and the kubectl commands that diagnose each one.
How to safely undo a git push --force
·2 mins
Recover the commits you overwrote with
git push --force using the reflog - and how to never need to again.How to inspect a Docker image without running it
·2 mins
See what’s inside a Docker image - layers, env, entrypoint, files - without ever running the container.
Finding and Fixing a Memory Leak in OpenTelemetry: A Debugging Walkthrough
··8 mins
A mysterious memory leak in production turned out to be caused by a bug in the OpenTelemetry Python library that only occurred in serverless environments, not during local testing.