New Year's Resolution Update - Learning Unix better

Earlier this month I made a New Year's Resolution, that I'm going to learn to use unix a little bit better.  Well, so far I've made some good progress as in the past week I have been starting to get used to the sed command.

I find it quite handy; how did I ever get along without it?  The one thing that's annoying is that it isn't pcre-compliant.  That would make it a lot easier for me to use.  I end up having to string multiple sed commands together in order to get it to work properly.

I understand there is a pcrsed command, but it's not installed on the machine I use at work where it would be useful to me.