Mark G. Sobell

Mark G. Sobell is the author of three best-selling UNIX and Linux books: A Practical Guide to the UNIX System, UNIX System V: A Practical Guide, and A Practical Guide to Linux. He has more than twenty years of experience working with UNIX and Linux and is president of Sobell Associates Inc., a consulting firm that designs and builds custom software applications, designs and writes documentation, and provides UNIX and Linux training and support.