Demonstrates using the Kubernetes Downward API to inject resource-derived env vars like GOMAXPROCS without hitting the API server.

Introduces journald RateLimitBurst/Interval, why throttling noisy logs matters, and how to scope limits per unit.

Defines MTU fundamentals, fragmentation rules for IPv4/IPv6, and how Path MTU Discovery finds the safe packet size.

Shows how go tool dist list reveals every GOOS/GOARCH combo so you can cross-compile with confidence.

Recommends rainbow deployments so long-running pods (like GitLab Runner) stay observable while new versions roll out.

Compares docker export’s flattened container snapshots to docker save image archives and clarifies when to choose each command.

Captures a Go execution trace and shows that pressing ? in the web UI reveals every navigation shortcut.

Explains how systemd drop-in units override service sections (GitLab Runner example) and how to inspect active overrides with systemctl.