[darkstar999]

Not necessarily. For example you could be a decent web developer on the Microsoft stack and not be proficient with the whole section "Learn To Work in Unix Shells". Also it could be easy to get by using git with a UI and not know any of the commands or medium/advanced functionality.

[camelCaseOfBeer]

To be fair if you truly understand how to use git with a UI you can probably pick up the console within an hour or two of some cursory googling.