Minimal images taught with their costs stated, for the platform engineer who will be on call for the result. What you genuinely gain in attack surface, pull time and triage load; what genuinely breaks, from the missing shell and the certificate bundle to timezone data, name resolution, probes and process identifier one; how to build them properly with multi stage builds and static linking; how to debug a container nobody can enter using ephemeral debug containers and instrumentation; when minimal is the wrong answer; and why a smaller image with fewer findings is not automatically a safer service.
Nothing. Every course, exam, and certificate on the catalog is free — including retakes. All you need is a free Safeguard account.
None. The flagship course, Safeguard Certified Practitioner, is a beginner-level course — basic familiarity with how software is built helps, but every exam question is answerable from the lessons themselves.
You can retake it after a 24-hour cooldown, as many times as you need. Retakes are free, and each attempt draws a fresh random set of questions.
The Safeguard Certified Practitioner credential is valid for 24 months from issue. The expiry date is printed on the certificate and shown live on its public verification page. Renewing means passing the current exam again.
