Anyone wiling to entertain some terminal-related questions?

Working on a book in which a character has to know a bit about using MacOS terminal. Anyone game? Thanks.

Just to be clear, as this is a work of fiction, and the Terminal "hacking" scene is a fairly small part of the book, what I'm looking to do is create an *authentic-feeling* scene, not necessarily dead-on accurate. I'm open to any/all ideas, Terminal-related or not.

For example, in the Terminal window what might commands to do the following look like, even if they're not doable in real life?

1) Disable wi-fi at a "deeper level" and password protect it from being turned back on. In other words, lock out my character.

2) Same with location services, specifically "Find My Mac"

3) A command string that would show recent Terminal activity, including the aforementioned password, so my character can sneakily undo the lock out.

4) Open a discreet, unnoticeable text-to-voice app that can be sent to a phone via wi-fi. In other words, my character can talk to another character without others realizing it.