I just ran across Language Tool[0] recently. Free, open-source proofreading lib, can be run totally locally. Uses Google Ngrams to check for often confused words. Didn't correct "doe snot" in my synthetic test just now, but that seems like a plausibly minor extension of existing functionality.
There’s at least one product trying to address the issue with “valid, but probably wrong” typos. It’s called Grammarly and for some unfathomable reason it gets advertised to me a lot on YouTube whenever Google detects I’m in South Korea; I believe they are seriously mistargeting their marketing efforts.
(That said, if it were me, I’m not sure if I would give up typing doe snot every once in a while.)
The spell checker in Chrome can already do that to some extent. For example, "The men walked over their to grab they're food." gets corrected: https://i.imgur.com/NR4zyVA.png
command-not-found [1] could implement that, if it isn't implemented already. I remember a Linux distribution with an application which would let a train pass in a few seconds after typing typical commands wrong. Trust me, you'll learn to type correct when that happens because it is very annoying.
Our org has a bunch of related miscellaneous projects called "pantry". Basically, if it doesn't fit standalone, you put it in the pantry. It works out better than you think, except when someone is doing a webex and misses an r.
Depends on the importance of the system. If it's a fairly unimportant home system that's excessively backed up, it's fairly easy to live life on the edge.
An alias would work but it wouldn't say rebnooting. That was my initial fix. But I was learning things at the time and I learned how to recompile parts of the distribution. I also learned how programs in Unix could invoke different effects based on name. Coming from DOS, it was a real surprise that reboot was a link to shutdown.
My wife drafts a lot of legal documents, and has a problem with "doe snot". Which unfortunately the spelling checker is perfectly happy with.