Unit 09 · lesson
Readiness Dry Run
Do the final check once before the final demonstration.
No notes for the first attempt.
Task A — environment
From a clean terminal, prove:
- Ubuntu target;
- Jazzy sourced;
- overlay sourced;
- package/executables discoverable.
Task B — start system
Launch the Unit 8 system.
Task C — inspect
Prove:
- expected nodes;
- expected topic type;
- publisher/subscriber endpoints;
- live messages.
Task D — explain source path
Point to:
package.xml;setup.pyentry points;- talker/listener source;
- launch file;
- workspace
installsetup.
Task E — controlled failure
Pick one safe failure:
- do not source overlay;
- temporarily remap listener to wrong topic;
- temporarily remove an entry point then rebuild;
- use a wrong launch file name.
Predict the symptom before creating it. Diagnose and repair it.
Readiness rubric
You are ready when you can do the sequence and explain the evidence, not when you can memorize every command character-for-character.