ced4568andClaude Sonnet 5
e007bcf000
Adds all 6 ROOT 02 modules (Linux system administration, storage & filesystems, the Networking Mental Model, Linux network inspection, DNS & HTTP, Linux troubleshooting) — 37 activities, each with a real lesson, demonstration/guided exercise, knowledge check, hands-on Lab, and reflection. The Networking Mental Model module (M3) gets deliberately extra depth per its "critical module" designation, with no lab by design — conceptual mastery via knowledge check and guided exercise, matching root-05-m00's own precedent. Adds 6 new hands-on Linux/networking scenarios plus 2 MCQs: linux-service-inspection (inspects the platform's own real nginx without touching it — a genuinely safe, real service-inspection target that avoids ever risking the Lab's own connectivity), linux-service-lifecycle (start/ verify/stop a fully controllable service), linux-storage-inspection, linux-network-inspection (ip/ss/getent/curl, each framed as answering one specific diagnostic question), linux-dns-http-diagnosis (a genuine DNS-resolves-but-wrong-port failure, diagnosed and fixed), and linux-troubleshooting-framework (a real missing-config-file failure, resolved via the RootNode Observe/Evidence/Hypothesis/Test/Repair/Validate/Prevent framework). All tested end-to-end via the real scenario-validation API, including negative tests confirming they fail when unsolved. Wires rootnode-linux-networking-assessment (2 required + 4 random-draw scenarios) using the existing Phase 3B assessment engine. Co-Authored-By: Claude Sonnet 5 <[email protected]>
38 lines
2.0 KiB
JSON
38 lines
2.0 KiB
JSON
{
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"id": "linux-storage-inspection",
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"title": "Find What's Actually Using the Disk",
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"category": "Linux Administration",
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"isolation_type": "shared_namespace",
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"difficulty": "Easy",
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"type": "task",
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"weight": 4,
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"description": "## Find What's Actually Using the Disk\n\nThree directories under `/srv/storage-lab/` (`logs`, `cache`, `data`) contain different amounts of data. \"It's probably the logs\" is a guess — find the real answer.\n\n**Your task:**\n\n1. Use `du` to measure the actual size of each of the three directories\n2. Use `df` to check overall filesystem usage on `/`\n3. Write the name of the directory (just `logs`, `cache`, or `data`) that uses the MOST space to `/srv/storage-lab/biggest.txt`",
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"hints": [
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{
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"title": "Measuring each directory",
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"body": "`du -sh <dir>` summarizes total size for one directory. Run it against all three, or use a wildcard to see them side by side.",
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"command": "du -sh /srv/storage-lab/*/"
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},
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{
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"title": "Overall filesystem usage",
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"body": "`df -h /` shows total/used/available space for the filesystem root lives on — a different, complementary question from `du` (which measures a specific directory's contents).",
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"command": "df -h /"
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}
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],
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"setup_commands": [
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{ "command": "mkdir -p /srv/storage-lab/logs /srv/storage-lab/cache /srv/storage-lab/data" },
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{ "command": "dd if=/dev/zero of=/srv/storage-lab/logs/app.log bs=1M count=1 2>/dev/null" },
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{ "command": "dd if=/dev/zero of=/srv/storage-lab/cache/blob.bin bs=1M count=10 2>/dev/null" },
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{ "command": "dd if=/dev/zero of=/srv/storage-lab/data/small.txt bs=1K count=2 2>/dev/null" }
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],
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"validation": {
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"commands": [
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{ "description": "correctly identified cache/ as the largest consumer", "command": "cat /srv/storage-lab/biggest.txt", "expected_output": "cache", "match": "exact" }
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]
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},
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"default_namespace": "default",
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"teardown_commands": [
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{ "command": "rm -rf /srv/storage-lab" }
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]
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}
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