We have common mistakes list <a href="http:&#x2F;&#x2F;www.webminal.org&#x2F;common_mistakes&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.webminal.org&#x2F;common_mistakes&#x2F;</a> but didn&#x27;t figure-out something like which is the least-used valid command. Good idea, we will dig deeper into their bash_history :)