Mark G. Sobell

Mark G. Sobell has forty years of experience working with UNIX and Linux systems and is the author of many best-selling books, including A Practical Guide to Fedora™ and Red Hat® Enterprise Linux®, Seventh Edition, and A Practical Guide to Ubuntu Linux®, Fourth Edition.

 

Matthew Helmke got his first computer in 1981, a TRS-80 Color Computer. He started using UNIX in 1987 while studying LISP. He works as a technical writer and has written about Linux and other topics for magazines and a diverse set of companies. He is the author of several books, including Ubuntu Unleashed, The Official Ubuntu Book, and VMware Cookbook.

Mark G. Sobell

Mark G. Sobell is President of Sobell Associates Inc., a consulting firm that specializes in UNIX and Linux training, support, and custom software development. He has more than thirty years of experience working with UNIX and Linux systems and is the author of many best-selling books, including A Practical Guide to Red Hat® Linux®, Seventh Edition, and A Practical Guide to Linux® Commands, Editors, and Shell Programming, Third Edition, both from Prentice Hall.