Well, I'm out here....
I moved full time to Macs about 2 years ago, but had never had any experience with *nix machines. I've only begun to get into that side of it, which is one of the reasons I joined this forum. There is a Mac Yahoo group (actually there are lots of Mac Yahoo groups, but only a couple of good ones) that I read quite a bit. The one in particular that I dig is:
http://groups.yahoo.com/group/mosx-hd/
The group owner nows everything, as far as I can tell.
Post all your Mac questions there and you'll be up to speed in no time. Sorry I couldn't help with the bash thing.
Later,
Eddie