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