ced4568andClaude Sonnet 5
15b616274b
Adds all 6 ROOT 01 modules (how computers run software, the shell, filesystem navigation, files & text, processes, users & permissions foundations), each with a real lesson, demonstration/guided exercise, knowledge check where warranted, a hands-on Lab, and a reflection — 35 activities, 29 new content files. Adds 6 new hands-on Linux scenarios (linux-inspect-hardware, linux-shell-basics, linux-filesystem-navigation, linux-files-and-text, linux-process-management, linux-permissions-foundations) plus 2 MCQ scenarios, using the existing generic scenario/ validation engine (docs/ROOT_FOUNDATIONS_LAB_STRATEGY.md §1) — every one tested end-to-end via the real scenario setup/validate API, including negative tests confirming they correctly FAIL when not actually solved (e.g. the process-management scenario fails while the target process is still running; the permissions scenario is tested against a real `su - labuser` denial). Wires rootnode-linux-foundations-assessment (2 required + 4 random-draw scenarios) using the existing Phase 3B assessment engine. Adds a real, server-side ROOT 01->02->03->04->05 course prerequisite chain (courses.prerequisites) — verified live on two students: one who completed ROOT 01 sees ROOT 02 unlock; a fresh student sees ROOT 02 correctly locked while 03/04/05 stay vacuously satisfied (their own prerequisite courses are still empty). ROOT 06+ and the Capstone are unaffected. Co-Authored-By: Claude Sonnet 5 <[email protected]>
32 lines
1.8 KiB
JSON
32 lines
1.8 KiB
JSON
{
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"id": "linux-files-and-text",
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"title": "Extract the Signal From a Log File",
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"category": "Linux Fundamentals",
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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": "## Extract the Signal From a Log File\n\nA real application log (`/srv/text-lab/app.log`) has been generated for you, mixing `INFO` and `ERROR` lines. Reading raw logs line-by-line doesn't scale — filtering does.\n\n**Your task:**\n\n1. Use `grep` to extract only the `ERROR` lines from `/srv/text-lab/app.log`\n2. Redirect the result into a new file: `/srv/text-lab/errors.txt`\n3. Count how many ERROR lines there were and save the count to `/srv/text-lab/error-count.txt`",
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"hints": [
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{
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"title": "Filtering and redirecting",
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"body": "`grep PATTERN file > newfile` writes only matching lines to a new file. Pipe to `wc -l` to count them.",
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"command": "grep ERROR /srv/text-lab/app.log > /srv/text-lab/errors.txt\ngrep -c ERROR /srv/text-lab/app.log > /srv/text-lab/error-count.txt"
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}
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],
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"setup_commands": [
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{ "command": "mkdir -p /srv/text-lab && printf 'INFO: boot ok\\nERROR: disk full\\nINFO: retry\\nERROR: timeout\\nINFO: done\\n' > /srv/text-lab/app.log" }
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],
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"validation": {
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"commands": [
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{ "description": "errors.txt contains only ERROR lines", "command": "grep -vc ERROR /srv/text-lab/errors.txt || true", "expected_output": "0", "match": "exact" },
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{ "description": "errors.txt has exactly the 2 real ERROR lines", "command": "wc -l < /srv/text-lab/errors.txt | tr -d ' '", "expected_output": "2", "match": "exact" },
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{ "description": "error-count.txt records the count", "command": "cat /srv/text-lab/error-count.txt", "expected_output": "2", "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/text-lab" }
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]
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}
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