ced4568andClaude Sonnet 5
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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]>
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Guided Exercise: Which Tool Actually Answers the Question?
This is a paper exercise — commit to an answer before checking it in the Lab.
Your task
For each situation, name the ONE command (or short pipeline) you'd reach for first:
- You want to see just the last 20 lines of a 50,000-line log file.
- You want to know how many lines in a file contain the word "timeout."
- You want to watch a log file update live while a process is running.
- You want to see a file's full contents but it's too long for one screen and you want to scroll through it interactively.
A worked shape to check yourself against
tail -n 20 file.loggrep -c timeout file.logtail -f file.logless file.log
Notice: cat would technically "work" for #4 too, but it dumps everything at once with no way
to scroll back — less is the actual right tool once a file is longer than one screen.
Instructor Notes
Facilitation: Item 4 is worth discussing explicitly — "it works" isn't the same bar as "it's the right tool for this situation," and that distinction matters more as commands compose into real troubleshooting workflows.
Approximate timing: 8-10 minutes live discussion; 5 minutes self-paced.