CKS_FINALE

submissions/CKS-013-completed.md

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+# CKS-013 — Verify a kubelet binary
+
+Domain: **1.5 Platform binary verification**  
+Time: **2 minutes** · Reward: **100 XP clean win**
+
+## Task
+
+Files:
+
+```text
+/opt/release/kubelet
+/opt/release/kubelet.sha256    # raw official hash only
+```
+
+Write commands to:
+
+1. verify the binary with `sha256sum --check`;
+2. after observing `OK`, install it at `/usr/local/bin/kubelet` as `root:root` with mode `0755` using `install`;
+3. show its version and installed mode/owner.
+
+No conditional shell scripting is required.
+
+## Section B — scored answer
+
+```bash
+echo "$(cat /opt/release/kubelet.sha256)  /opt/release/kubelet" | sha256sum --check
+echo "if ok"
+install -o root -g root -m 0755 /opt/release/kubelet /usr/local/bin/kubelet
+stat /usr/local/bin/kubelet
+/usr/local/bin/kubelet --version
+```
+
+Say **Grade CKS-013** when saved.