Just wanted to let you know what not to do…

Don’t make a symlink to /usr as /opt and then install macports. Macports will think that the /opt (which is really /usr) is where it should install all of it’s port crap. I mean it pollutes it. Well, not as bad as git, but it’s not good to just have all that crap lying around. Either way, I gotta fix this mess now.

Man.

Update

Also, don’t rename /usr to /old_usr

Because if you try something like: sudo mv /usr /old_usr; sudo mv /new_usr /usr it will say sudo command not found for the second command.

You won’t even be able to shutdown.