A basic GIT guide for the SVN user

I know there’s been written a lot about this, but either way I’ve found it so hard to switch from subversion and keep mixing stuff! I still consider myself a git newbie, not even liking git too much yet. I guess it’ll grow on me, though. Having spent too much time struggling, I’ve finally learned to master some simple techniques, as undoing changes, undeleting and removing new files not yet under source control. I’ll show these after the following desparate attempt to explain how the repository concepts differ fundamentally. This you must understand: