Write one evidence note across the command-line stage

First identify the system and shell, then choose the matching syntax.
For each claim, name the supplied evidence, explain the operation and
state a limit. Distinguish observed results from paper predictions and
leave any actual Windows or remote connection work deferred.

Original case: Windows folder with oak.txt, pine.txt and folder drafts.
Task: list only files, then name the shell and kind of pipeline data.
A: cmd dir /b /a-d
B: PowerShell Get-ChildItem -File | Select-Object Name
Linux companion: owned note tree, mode 640 analyst/learners, one owned
sleep job, metadata-only apt refresh and a read-only note-list script.
Write a short evidence note mapping path/shell, role/mode, stdout/file,
process identity, package transaction and script effects. SSH labels are
for syntax only. Do not type Linux commands into cmd to test a guess.