Beginning Unix

Paul Love (Cincinnati, OH), CISSP, CISA, CISM, Security+, has been in the IT field for 15 years. Paul holds a Masters of Science degree in Network Security and a Bachelor’s in Information Systems. He has co-authored two Linux security books, contributed to multiple Linux/Unix books, and has been the technical editor for over 10 best selling Linux and Unix books. Paul also ran a successful Linux portal site during the dot com era and has been an avid Unix/Linux user and administrator both professionally and as a hobby for many years. Joe Merlino (Boston, MA) is an experienced system administrator with Unix and Linux for more than a decade.Craig Zimmerman (New York, NY) manages UNIX, Macintosh, and Windows systems for Spontaneous, a post-production company in New York City. He previously worked at Chiat/Day helping build the world’s most famous virtual advertising agency, managing and networking Unix and Macintosh systems in multiple offices.Jeremy C. Reed (Marysville, WA) is a programmer, a member of NetBSD, and has actively taught FreeBSD, NetBSD, and OpenBSD administration classes for the past three years.Paul Weinstein (Chicago, IL) has worked on various Unix-based computing platforms, from the mainframe (Harris HCX-9) to the desktop (Powerbook G4) and has developed applications on just about all of the current major branches of Unix in the course of the past 10 years. Recently he has been focusing a lot of his attention on developing and integrating Web-based systems using tools such as Linux, Apache, MySQL, and Perl, and in doing so has brought his unique understanding to a wide range of computing environments ranging from public elementary schools to pioneering open source companies. Currently, Paul works as President and Chief Consultant for the computer consulting firm Kepler Solutions, Inc.David Mercer (Cape Town, South Africa) is a long-time Unix user and PHP programmer who contributed to Beginning PHP4 and Beginning PHP5. He has maintained a keen interest in all things open source ever since he managed to put together a working Beowulf cluster by nicking old computer parts from colleagues and assembling them under his desk.

“…works from the ground up, covering Apple OS X (which is Unix based) as well as the Linux and Solaris operating systems.” (Publishing News, 25th March 2005)

• Acknowledgements xix Introduction xxiWho Is This Book For? xxiWhat Does This Book Cover? xxiiHow This Book Is Structured xxiiWhat Do You Need to Use This Book? xxvConventions xxvSource Code xxvErrata xxvChapter 1: Unix Fundamentals 1Chapter 2: First Steps 9Chapter 3: Understanding Users and Groups 29Chapter 4: File System Concepts 53Chapter 5: Customize Your Working Environment 81Chapter 6: Unix Commands In-Depth 105Chapter 7: Editing Files with Vi 125Chapter 8: Advanced Tools 149Chapter 9: Advanced Unix Commands: Sed and AWK 167Chapter 10: Job Control and Process Management 181Chapter 11: Running Programs at Specified Times 199Chapter 12: Security 213Chapter 13: Basic Shell Scripting 227Chapter 14: Advanced Shell Scripting 243Chapter 15: System Logging 269Chapter 16: Unix Networking 283Chapter 17: Perl Programming for Unix Automation 303Chapter 18: Backup Tools 321Chapter 19: Installing Software from Source Code 343Chapter 20: Conversion: Unix for Mac OS Users 371Chapter 21: Conversion: Unix for Windows Users 389Appendix A: Answers 411Appendix B: Useful Unix Web Sites 421Index 425