Jon "maddog" Hall currently is the Board Chair of the Linux Professional Institute.

Starting in 1969 (a half-century ago), Mr. Hall has been a programmer, systems designer, systems administrator, product manager, technical marketing manager, educator, author, CEO and consultant.

Mr Hall concentrated on Unix systems since 1980 and Linux systems since 1994 (a quarter century ago), when he first met Linus Torvalds and correctly recognized the commercial importance of Linux and Free and Open Source Software.

Mr. Hall is an author of numerous magazine and newspaper articles, many presentations and one book, "Linux for Dummies". He writes for Linux Pro Magazine and occasionally blogs for them.

Mr. Hall has traveled to over 100 countries, speaking on Free and Open Source Software. He received his BS in Commerce and Engineering from Drexel University (1973), and his MSCS from RPI in Troy, New York (1977).

maddog presents 4 Events: