2026-03-23 (3UE*2): PWM Exercise, Shell Exercise
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* :doc:`/trainings/material/soup/linux/basics/shell/exercises/cp-mv-mkdir-rm/index`

  Show an inline loop, reading temperature. Discuss the nature of
  ``true`` and ``false``, and ``[``. Transform into shell
  script. Initially without shebang, but 755, then explain interpreter
  line.

* Bring :doc:`PWM exercise <homework-2026-03-16-pwm>` to an end