Michael Jang, (RHCE, LPIC-2, UCP, Linux+, MCP), author of the popular RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) and about 20 other professional technology titles, is currently a full-time writer, specializing in operating systems and networks. His experience with computers goes back to the days of jumbled punch cards. He has written other books on Linux certification, including LPIC-1 in Depth, Mike Meyers Linux+ Certification Passport, and Sair GNU/Linux Installation and Configuration Exam Cram. His other Linux books include Linux Annoyances for Geeks, Linux Patch Management, and Mastering Fedora Core Linux 5. He has also written or contributed to books on Microsoft operating systems, including MCSE Guide to Microsoft Windows 98 and Mastering Windows XP Professional, Second Edition. Alessandro Orsaria (London, England) is an IT Infrastructure Architect with more than 15 years of experience with Linux systems. He is currently employed by a global equity hedge fund and has authored articles for Linux Magazine and Linux Journal. Alessandro is Red Hat RHCE and RHCA certified and has a double Cisco CCIE certification in Routing & Switching and Datacenter. He holds an MBA from Imperial College of London and a degree in Physics.