The Simulator Hub

5 focused tests × 10 questions — covering Cluster Hardening, Pod Security, Supply Chain, Runtime Security, and Network policies. Hints on every question, scored results with full explanations.

Understand Discretionary Access Control vs Mandatory Access Control — a key CKS security model concept with interactive examples.

Visualise how Kustomize label transformers apply labels across all resources in an overlay — great for CKAD & CKA practice.

Learn how to trace system calls with strace — essential for CKS runtime security and debugging suspicious container behaviour.

Interactive visualiser showing how PersistentVolumes bind to PersistentVolumeClaims — access modes, storage classes, and capacity matching.

Decode container and process exit codes — what 137, 1, 126, 127, 143 mean and how to debug them in Kubernetes pods.

Master grep interactively — patterns, flags (-i, -r, -v, -n, -E), regex, and real-world examples in a fun gamified format.

Interactive file permission trainer — chmod, chown, octal notation, SUID/SGID, sticky bit. Build intuition for Linux permissions fast.

Test your Linux fundamentals with timed quiz questions — commands, file system, processes, networking, and more. Great warm-up before any CK* exam.