31 articles tagged with Operations.
The kubectl commands we actually type, grouped by the job in front of you, from switching contexts to rolling back a bad deploy. Copy-paste blocks, real output fields, and the errors that mean you are pointed at the wrong cluster.
A slow database made a backend service look dead, and the health check that was supposed to protect it killed it faster. The lesson has nothing to do with AI.
CERN is moving accelerator control computers to Debian because RHEL raised its minimum CPU level. Check your own fleet's x86-64-vN support before the next OS upgrade does it for you.
Since 11 September 2026 the 24-hour clock for actively exploited vulnerabilities is live. The owner, the decision path, the SBOM lookup, and the runbook you need this month.
AWS says it cannot restore data held only in Bahrain (me-south-1) or in one UAE zone. Multi-AZ gave availability, not recovery, and only cross-region copies survived.
Most Docker time is spent fighting the same handful of errors. This is the map: what each one means, the command that reveals the cause, and the fix.
Rejected pushes, local changes that would be overwritten, merge conflicts, detached HEAD, unrelated histories, publickey denials, and oversized files. What each message means and the safe fix.
CrashLoopBackOff, ImagePullBackOff, OOMKilled, Pending, NodeNotReady, CreateContainerConfigError, and failing probes, each with what it means, the command that diagnoses it, and the usual fix.
A node flips to NotReady and pods start disappearing. Here's the order we check things in, the usual culprits, and how to recover without making it worse.
The ordered kubectl toolkit we reach for when a pod misbehaves, with the five commands we run first and what each one actually tells you.
A pod that logged fine for weeks starts throwing EMFILE at 3am. Here's how to tell a real file-descriptor leak from a limit that's just set too low.
Deleting a committed file only hides it from the latest commit. The blob still lives in history, and if it was a secret, it's already compromised.
