UNIX for Dummies Questions & Answers

I am trying to find a Regex match for a string: CAR- and CAR_

So I need to match only the letters CAR or a / or a -. So if the word CAR ends in - I need to match it or if it ends in _ I need to match it.

Anyone know this regex?

If you don't identify what is using the regular expression, the requirements will often vary. In this case:
CAR[-_]
will match either of these strings anywhere in a line or file or string in you need a basic regular expression or extended regular expression that can be used in many utilities; it will not work in a filename matching pattern unless the regular expression is intended to only match an entire filename.