competitive positioning

Linux is as an example of a company that understands competitive positioning. How can companies offering “free” products (e.g., Linux, Netscape) make money from these products? How can other companies compete with these fast-rising standard products?  Include relevant information--facts and/or opinions--from “expert” sources to support selections. Citations and references must be written in Harvard style of citation. Your paper should be about 500 words not counting title page and references. Answer should be in your own words not copied from web sources. Use at least 3 to 5 credible references