thanks for your responses. Here is the situation. I have an interview tomorrow and I may get questions related to the options available on a Solaris environment. I'm not sure what options I can use in Solaris. The linux system that I'm on has options for UNIX (it says no "-") and BSD (it says use the "-"). So I'm trying to understand which of these 2 is more similar to the Solaris environment. Thanks for any help you can provide.