Practical articles on AI, DevOps, Cloud, Linux, and infrastructure engineering.
Exit 137 usually means the kernel shot your container for eating too much memory. Here's how to confirm the OOM kill and stop it happening again.
Your build fails, your containers won't start, and df says the disk is full. Here's where Docker hides the gigabytes and how to get them back safely.
A Pending pod means the scheduler couldn't place it or the node couldn't start it. Here's how to read the events and clear the eight causes we hit most.
We've run both in anger. Here's the honest breakdown of maintenance, cost, and flexibility, plus when Jenkins still earns its keep.
You run docker run, and it refuses to bind port 8080. Something already owns that port. Here is how to find the holder and get your container up.
A pod dies, restarts, dies again, and the events say OOMKilled. Here is what exit code 137 actually means and how to stop the loop for good.
You run the container, check docker ps, and it's already gone. Nine times out of ten it's PID 1 doing its job. Here's how to read it.
You committed too early, wrote a bad message, or included the wrong file. Here's the decision tree for undoing a Git commit safely, by what you actually want to keep.
A production-focused GitHub Actions guide: reusable workflows, least-privilege permissions, keyless OIDC to the cloud, SHA-pinned actions, environments with approvals, concurrency-safe deploys, and CodeQL/Dependabot gates — with copy-paste examples.
The daemon error almost never means Docker is broken. Nine times out of ten it's a stopped service, a stale context, or a wrong env var. Here's the checklist.
CrashLoopBackOff means your container keeps dying on startup and Kubernetes keeps restarting it slower each time. Here's the diagnosis flow we actually use.
Your pod is stuck because the node can't pull the image. Here's how to read the events, find the real reason, and fix each one fast.
