? From the Foreword by Tim O Reilly,? Founder of O Reilly Media? who is this? book fun and functional as a desktop reference. This? S only information conveyed in a straightfoward and impressive full-color mode.? ? Jason A. Pat Parseghian? ? Twentieth anniversary edition of the world s best-selling UNIX systems administration book has been made even better by adding a range of leading Linux distributions: Ubuntu, openSUSE, and RHEL. This book approaches system administration in a practical way and is a valuable reference for administrators new and experienced professionals. It details best practices for every aspect of system administration, including storage management, network design and administration, email, web hosting, scripts, software configuration management, performance analysis, Windows interoperability, virtualization, DNS, security, IT service management organization, and far more:. UNIX and Linux System Administration Handbook Fourth Edition, reflects the current operating system version Ubuntu Linux OpenSUSE Linux Red Hat Enterprise Linux American Oracle Solaris?