I often need to present myself differently in git per project. When I work on a client’s own github, and they provide me an email address, it’s more professional, and most of the time a requirement, to use it to identify myself. Git, by default lets me specify configuration globally, or per repository. However, with a little trick I can set it on any abstraction level I need. ...

A few years ago I switched between a few machines on a daily basis, and tweaked my environments constantly. It was a tedious task to update each of them one by one, every time I changed configs or aliases in any of them. I figured this has got to be easier somehow, and found the hidden world of dotfiles. ...