In my experience repetition helped. Not memorization, but more like muscle memory.

Also, ensuring to never copy and paste commands but to type them in manually yourself. It’s hard to enforce this on yourself, but worth it.

I appreciate that this article started with “ways to reduce risk” because that’s an extremely valid concern and tied to why you shouldn’t ever copy and paste. The one time in my early Linux forays where I copied and pasted I wiped the wrong drive, it definitely taught me to always manually type it in and not get too lazy, because what you copied might not match what you want to do exactly.