文件名称:
Linux+ Study Guide 2001
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文件大小: 18mb
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上传时间: 2010-09-26
详细说明： Why should you learn about Linux? It’s a fast-growing operating sys- tem, and it is inexpensive and flexible. Linux is also a major player in the small and mid-sized server field, and it’s an increasingly viable platform for workstation and desktop use, as well. By understanding Linux, you’ll increase your standing in the job market. Even if you already know Windows or MacOS and your employer uses these systems exclusively, understanding Linux will give you an edge when you are looking for a new job or if you are looking for pro motion. For instance, this knowledge will allow you to make an informed decision about if and when you should deploy Linux. The Computing Technology Industry Association (CompTIA) has devel- oped its Linux+ exam as an introductory certification for people who want to enter careers involving Linux. The exam is meant to certify that an indi- vidual has the skills necessary to install, operate, and troubleshoot a Linux system, and is familiar with Linux-specific concepts and basic hardware. The purpose of this book is to help you pass the Linux+ exam. Because this exam covers basic Linux installation, use, configuration, administration, and hardware interactions, those are the topics that are emphasized in this book. You’ll learn enough to get a Linux system up and running and how to configure it for many common tasks. Even after you’ve taken and passed the Linux+ exam, this book should remain a useful reference. How This Book Is Organized This book consists of nine chapters plus supplementary information: a glos- sary, this Introduction, and the Assessment Test after the Introduction. The chapters are organized as follows: Chapter 1, “Planning the Implementation,” covers things you should consider before you install Linux on a computer. This chapter com- pares Linux to other OSs, it discusses Linux’s hardware requirements and its disk partition requirements, it describes the various Linux dis- tributions, and it explores the software licenses found in the Linux world. Chapter 2, “Installing Linux,” covers the Linux installation process. Because Linux is available in several variant forms, this chapter focuses on just one (Linux Mandrake 8.0), but other Linux distribu- tions must perform the same fundamental tasks, so much of this infor- mation is directly applicable to other distributions. This chapter also covers the post-installation configuration of one particularly critical Linux component: the X Window System (or X for short), which pro- vides Linux’s GUI environment. Chapter 3, “Software Management,” covers how to install and con- figure software. Much of this discussion is devoted to the two major package management systems in Linux, the Red Hat Package Man- ager (RPM) and Debian packages. This chapter also covers kernel issues and boot loaders (which are used to boot a Linux kernel). Chapter 4, “Users and Security,” covers how to create and maintain user accounts; it also covers the security issues surrounding users and Linux more generally. Because Linux is a clone of Unix, it includes extensive support for multiple users, and understanding Linux’s model for user accounts is critical to many aspects of Linux’s operation. Chapter 5, “Networking,” covers how to use Linux on a network. This chapter includes an overview of what a network is, including the popular TCP/IP networking tools upon which the Internet is built. Several popular Linux network client programs are discussed, as is the subject of how to control access to a Linux computer. Copyright ©2001 SYBEX, Inc., Alameda, CA www.sybex.com Introduction xxvii Chapter 6, “Managing Files and Services,” covers many of the impor- tant Linux configuration files and some miscellaneous administrative and user tasks, such as how you should use a GUI environment and how to write a shell script. Most of these tasks aren’t very glamorous, but they’re critically important for you to know if you want to keep a system running properly. Chapter 7, “Managing Partitions and Processes,” covers two things: filesystems (disk partitions and the data they contain) and processes (running programs). Specific topics include how to create and manage filesystems, how to back up and restore a computer, how to run pro- grams at specific scheduled times, and how to manipulate running processes. Chapter 8, “Hardware Issues,” covers various hardware topics. These include configuring printers, using kernel modules (drivers for specific hardware devices), adding new hardware, using laptop computers, and diagnosing hardware problems. Some of these issues are the same as in other OSs, but Linux handles some hardware devices in funda- mentally different ways than do many other OSs. Chapter 9, “Troubleshooting,” is devoted to the question of what to do when things go wrong. This chapter includes information on how to narrow down the problem space to a manageable size, and it includes advice on how to proceed when you see many common prob- lem symptoms. Each chapter begins with a list of the CompTIA Linux+ objectives that are covered in that chapter. (The book doesn’t cover objectives in the same order as CompTIA lists them, so don’t be alarmed when you notice gaps in the sequence.) At the end of each chapter, there are several elements you can use to help prepare for the exam: Exam Essentials This section summarizes important information that was covered in the chapter. You should be able to perform each of the tasks or convey the information requested. Commands in This Chapter Most chapters include discussion of sev- eral Linux commands. (Chapter 1 is an exception to this rule.) You should be familiar with these commands before taking the exam. You might not need to know every option for every command, but you should know what the command does and be familiar with its major options. (Chapter 3 begins with a discussion of how to perform basic tasks in a Linux com- mand shell.) Copyright ©2001 SYBEX, Inc., Alameda, CA www.sybex.com xxviii Introduction Key Terms The key terms are italicized throughout the text. They’re important terms with which you should be familiar before you take the exam. The Glossary provides definitions for all of the key terms. They’re also defined in the text in which they’re first discussed extensively. Review Questions Each chapter concludes with twenty review ques- tions. You should answer these questions and check your answer against the one provided after the questions. If you can’t answer at least 80 per- cent of these questions correctly, go back and review the chapter, or at least those sections that seem to be giving you difficulty. ...展开收缩
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