Forgive me if this is a stupid question, because I am someone unknowledged when it comes to the whole OSX written with a Unix base. In XCode, it gives you an option to create a "Command-line Tool" which is still in Ojb-C, just lacks the cocoa interface. My understanding is that that command line is the Unix that underlies OSX. Does that mean that those "Command-line Tools" are actually Unix programs that I could copy and run on a Unix computer? If not, is there a way to create a Unix program in XCode, and if so, how?