I log on to a lot of various unix like machines (mainly Mac & Linux), and I have setup my environment for things such as autotest, vim, and my bash prompt in my own useful way.

I used to store this in a private subversion repository, but I figured in the process of converting it to git, that I should share it. It is on github for all to see.

Recent addition was adding the current git branch to the bash prompt as mentioned on Simplistic Complexity