cks-final/submissions/CKS-013-completed.md

CKS-013 — Verify a kubelet binary

Domain: 1.5 Platform binary verification
Time: 2 minutes · Reward: 100 XP clean win

Task

Files:

/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

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.