Real environments for every cert you're chasing.
A browser-based lab for eight certifications across Kubernetes, Linux, and network security. The hands-on exams give you your own real cluster or Linux VM, scored by programmatic validators; the multiple-choice exams give you a question bank where every answer is explained. Either way, an attempt history shows exactly what you missed and why.
Certifications
Eight certifications. One lab engine.
Pick the certification you're studying for. Hands-on Kubernetes and Linux labs graded by validators, plus explained question banks for the multiple-choice exams. Every certification is bought independently, one-time, with a free preview or a free graded task first.
Operate the cluster.
Cluster architecture, workloads, services & networking, storage, and the troubleshooting domain that's 30% of the exam. For ops, platform, and SRE.
Build & ship apps.
Designing, deploying, observing, and configuring workloads: pods, deployments, probes, config, and networking. For developers shipping to Kubernetes.
Harden & defend.
Cluster & system hardening, supply chain, and runtime security with Falco, Trivy, and Pod Security. The advanced exam. Requires an active CKA.
Start here.
The entry-level Kubernetes exam: multiple choice, concept-driven. 317 original questions with full explanations, learn mode, flashcards, and a timed 60-question mock. $15 for 30 days of access, free preview first.
Security, from the ground up.
The entry-level cloud native security exam: multiple choice, concept-driven, no prerequisites. 310 questions with full explanations, learn mode, flashcards, and a timed mock across the six official domains. $15 for 30 days of access, free preview first.
The security baseline.
The most widely held entry security certification: 483 exam-style questions across all five SY0-701 domains, every answer explained, 10 PBQ-style interactive labs, flashcards, plus a timed 90-question mock at the real 750/900 cut score. $29 for 30 days of access, free preview first.
Master the machine.
Performance-based EX200 practice on a real Linux VM: storage, LVM, SELinux, systemd, users, networking, and podman, graded on actual machine state.
Read the firewall.
131 original practice questions, 41 built on FortiGate configuration exhibits, with explanations, flashcards, and 50-question mocks aligned to the official NSE 4 FortiOS 7.6 objectives.
What it does
Three things, done well.
No video courses. No fake simulators. Use quick quizzes to warm up, then work the same kind of environment, the same kind of task, and the same kind of grader you'll meet on exam day, for whichever certification you're chasing.
Real environments, on demand.
Each attempt boots an isolated kind cluster or a dedicated KVM virtual machine, wired through an embedded desktop. SSH targets are real, kubectl is real, and the failure modes are real.
Programmatic validators.
Every task ships its own check script. You get partial credit for partial work, an output trace per question, and a reviewable diff between your state and the target.
Per-user attempt log.
Every finished exam (score, duration, missed tasks, the validator output, and the canonical solution) is saved to your console. Pattern-spot what you keep getting wrong.
How it works
From sign-up to scored, in four moves.
No installs. No local kubeconfig surgery. Open the lab, get your environment, finish the tasks, read your report.
Create an account.
Email + password, or Google SSO. You land in your student console: profile, target score, sync clock.
Open the lab.
One click spins your environment, a 2-node kind cluster or a real Linux VM, plus an embedded desktop. Provisioning runs once across the whole exam.
Work in-context.
Each question gives you the target, a docs link, and a question rail beside the live workspace. Submit when satisfied.
Read the report.
Programmatic validators run on finish. Pass/fail, per-task feedback, and the canonical solution post to your history.
Choose the access you need
Each certification is sold separately. One payment, no subscription. List prices in USD before applicable taxes or discounts.
| Certification | Price / access | Included |
|---|---|---|
| CKA | $39 / 30 days | 17 tasks · 5 full-sim attempts · unlimited task practice |
| CKAD | $39 / 30 days | 17 tasks · 5 full-sim attempts · unlimited task practice |
| CKS | $39 / 30 days | 16 tasks · 5 full-sim attempts · unlimited task practice |
| RHCSA | $39 / 30 days | 29 tasks · 3 full-sim attempts · unlimited task practice |
| KCNA | $15 / 30 days | 317 questions · unlimited mocks |
| KCSA | $15 / 30 days | 310 questions · unlimited mocks |
| NSE4 | $49 / 30 days | 131 questions · unlimited mocks |
| Security+ | $29 / 30 days | 483 questions · unlimited mocks |
Lab passes begin on activation; question-bank access begins at purchase. Legacy lifetime purchases keep their original terms. Read every Kubernetes task description free; the selected weekly lab is free with an account (2 starts per certification per week). Question banks offer a free preview.
Create an account →FAQ
Things people ask before signing up.
Which certification should I start with?
It depends which stack you work in. On Kubernetes: KCNA if you want the concepts before touching a cluster, CKA if you operate clusters (ops, platform, SRE), CKAD if you build and deploy apps onto clusters someone else runs, and CKS for advanced security, which requires an active CKA first. KCSA is the concept-level security entry point, with no prerequisites. Outside Kubernetes: RHCSA is the Red Hat Linux systems-administration standard, NSE4 covers FortiGate firewall administration, and Security+ is the vendor-neutral security baseline most people start with. Each page lists the full curriculum.
Do I buy them all together, or separately?
Each certification is a separate one-time purchase. Lab passes start on activation; question-bank windows start at purchase. See the current price and included access for each certification. There is no subscription.
Is this affiliated with the Linux Foundation or CNCF?
No. prepium.sh is an independent practice environment. We track the published curricula closely for every certification we cover, but we are not the certifier, and we are not affiliated with or endorsed by the Linux Foundation, CNCF, Red Hat or Fortinet.
Do I need to install anything?
No. Everything runs in your browser: the cluster or virtual machine, the desktop, the editor, the validators. You'll need a modern browser and a stable connection.
How accurate are the validators?
Each task ships with a check script that inspects cluster state, not a string match on your commands. There are usually multiple valid solutions; the grader rewards any of them and gives partial credit.
How does this compare to killer.sh?
Killer.sh gives you 2 sessions bundled with each exam purchase. prepium.sh gives you 5 attempts at the full exam simulation plus unlimited single-task practice for 30 days (or per-attempt pricing), a persistent attempt history with solutions, quizzes, and a free graded Task of the Week per cert. Both use real cluster environments.
Can my team use this?
Yes. Admins can provision accounts and watch aggregate progress from the admin console, across any of the eight certifications. Talk to us about per-cohort licensing.
Pick an exam. Open a real environment.
Eight certifications: real clusters for CKA, CKAD and CKS, a real Linux VM for RHCSA, and explained question banks for KCNA, KCSA, Security+ and NSE4. Programmatic scoring and a permanent attempt history throughout. Start with a free graded Task of the Week, then a one-time unlock from $15, never a subscription.
- CKA · CKAD · CKS · RHCSA · KCNA · KCSA · Security+ · NSE4
- One-time from $15 · never a subscription
- 7-day refund, no questions asked
- Real clusters and real VMs, not a simulator
- Programmatic, partial-credit scoring
- Persistent, per-user attempt log