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《使用 Perl实现系统管理自动化(第2版)(影印版)》内容简介：如果你从事任何系统管理方面的工作，就必须应对日益复杂的工作环境以及对你的时间不断增加的需求。《使用Perl实现系统管理自动化 第二版》不仅提供了可用于工作的恰当工具，还给出了许多建议，帮助你解决特定问题以及安全地自动处理重复事务。这一版的“*书”经过更新和扩充，涵盖了*的操作系统、技术和Perl模块，将会帮助你：

* 管理用户账户

* 监测文件系统和进程

* 处理XML和YAML等格式的配置文件

* 使用DBI管理数据库，包括MySQL、MS SQL和Oracle

* 处理LDAP和Active Directory等目录服务

* 编写脚本管理电子邮件协议和垃圾邮件

* 高效地创建、处理和分析日志文件

* 管理网络名称和配置服务，包括NIS、DNS和DHCP

* 维护、监测和映射网络服务

* 提高文件系统、进程和网络的安全性

这一版的附录中还包含了额外内容，帮助你快速掌握XML/XPath、LDAP、SNMP和SQL等技术。《使用 Perl实现系统管理自动化(第2版)(影印版)》在手并结合Perl，你将花费更少的资源，付出更少的劳动，大大减少烦恼，让你事半功倍。

Preface

1. Introduction

Automation Is a Must

How Perl Can Help You

This Book Will Show You How

What You Need

Some Notes About the Perl Versions Used for This Book

What About Perl 5.10?

What About Strawberry Perl?

What About Perl 6?

Some Notes About Using Vista with the Code in This Book

Locating and Installing Modules

Installing Modules on Unix

Installing Modules on Win32

It’s Not Easy Being Omnipotent

Don’t Do It

Drop Your Privileges As Soon As Possible

Be Careful When Reading Data

Be Careful When Writing Data

Avoid Race Conditions

.Enjoy

References for More Information

2. Filesystems

Perl to the Rescue

Filesystem Differences

Unix

Windows-Based Operating Systems

Mac OS X

Filesystem Differences Summary

Dealing with Filesystem Differences from Perl

Walking or Traversing the Filesystem by Hand

Walking the Filesystem Using the File::Find Module

Walking the Filesystem Using the File::Find::Rule Module

Manipulating Disk Quotas

Editing Quotas with edquota Trickery

Editing Quotas Using the Quota Module

Editing NTFS Quotas Under Windows

Querying Filesystem Usage

Module Information for This Chapter

References for More Information

3. User Accounts

Unix User Identities

The Classic Unix Password File

Changes to the Password File in BSD 4.4 Systems

Shadow Passwords

Windows-Based Operating System User Identities

Windows User Identity Storage and Access

Windows User ID Numbers

Windows Passwords Don’t Play Nice with Unix Passwords

Windows Groups

Windows User Rights

Building an Account System to Manage Users

The Backend Database

The Low-Level Component Library

The Process Scripts

Account System Wrap-Up

Module Information for This Chapter

References for More Information

Unix Password Files

Windows User Administration

4. User Activity

Process Management

Windows-Based Operating System Process Control

Unix Process Control

File and Network Operations

Tracking File Operations on Windows

Tracking Network Operations on Windows

Tracking File and Network Operations in Unix

Module Information for This Chapter

Installing Win32::Setupsup

References for More Information

5. TCP/IP Name and Configuration Services

Host Files

Generating Host Files

Error-Checking the Host File Generation Process

Improving the Host File Output

Incorporating a Source Code Control System

NIS, NIS+, and WINS

NIS+

Windows Internet Name Server (WINS)

Domain Name Service (DNS)

Generating DNS (BIND) Configuration Files

DNS Checking: An Iterative Approach

DHCP

Active Probing for Rogue DHCP Servers

Monitoring Legitimate DHCP Servers

Module Information for This Chapter

References for More Information

6. Working with Configuration Files

Configuration File Formats

Binary

Naked Delimited Data

Key/Value Pairs

Markup Languages

All-in-One Modules

Advanced Configuration Storage Mechanisms

Module Information for This Chapter

References for More Information

XML and YAML

7. SQL Database Administration

Interacting with a SQL Server from Perl

Using the DBI Framework

Using ODBC from Within DBI

Server Documentation

MySQL Server via DBI

Oracle Server via DBI

Microsoft SQL Server via ODBC

Database Logins

Monitoring Space Usage on a Database Server

Module Information for This Chapter

References for More Information

DBI

Microsoft SQL Server

ODBC

Oracle

8. Email

Sending Mail

Getting sendmail (or a Similar Mail Transport Agent)

Using the OS-Specific IPC Framework to Drive a Mail Client

Speaking the Mail Protocols Directly

Common Mistakes in Sending Email

Overzealous Message Sending

Subject Line Waste

Insufficient Information in the Message Body

Fetching Mail

Talking POP3 to Fetch Mail

Talking IMAP4rev1 to Fetch Mail

Processing Mail

Dissecting a Single Message

Dissecting a Whole Mailbox

Dealing with Spam

Support Mail Augmentation

Module Information for This Chapter

References for More Information

9. Directory Services

What’s a Directory?

Finger: A Simple Directory Service

The WHOIS Directory Service

LDAP: A Sophisticated Directory Service

LDAP Programming with Perl

The Initial LDAP Connection

Performing LDAP Searches

Entry Representation in Perl

Adding Entries with LDIF

Adding Entries with Standard LDAP Operations

Deleting Entries

Modifying Entry Names

Modifying Entry Attributes

Deeper LDAP Topics

Putting It All Together

Active Directory Service Interfaces

ADSI Basics

Using ADSI from Perl

Dealing with Container/Collection Objects

Identifying a Container Object

So How Do You Know Anything About an Object?

Searching

Performing Common Tasks Using the WinNT and LDAP Namespaces

Working with Users via ADSI

Working with Groups via ADSI

Working with File Shares via ADSI

Working with Print Queues and Print Jobs via ADSI

Working with Windows-Based Operating System Services via ADSI

Module Information for This Chapter

References for More Information

LDAP

ADSI

10. Log Files

Reading Text Logs

Reading Binary Log Files

Using unpack()

Calling an OS (or Someone Else’s) Binary

Using the OS’s Logging API

Structure of Log File Data

Dealing with Log File Information

Space Management of Logging Information

Log Parsing and Analysis

Writing Your Own Log Files

Logging Shortcuts and Formatting Help

Basic/Intermediate Logging Frameworks

Advanced Logging Framework

Module Information for This Chapter

References for More Information

11. Security

Noticing Unexpected or Unauthorized Changes

Local Filesystem Changes

Changes in Data Served Over the Network

Noticing Suspicious Activities

Local Signs of Peril

Finding Problematic Patterns

Danger on the Wire, or “Perl Saves the Day”

Preventing Suspicious Activities

Suggest Better Passwords

Reject Bad Passwords

Module Information for This Chapter

References for More Information

12. SNMP

Using SNMP from Perl

Sending and Receiving SNMP Traps, Notifications, and Informs

Alternative SNMP Programming Interfaces

Module Information for This Chapter

References for More Information

13. Network Mapping and Monitoring

Network Mapping

Discovering Hosts

Discovering Network Services

Physical Location

Presenting the Information

Textual Presentation Tools

Graphical Presentation Tools

Monitoring Frameworks

Extending Existing Monitoring Packages

What’s Left?

Module Information for This Chapter

References for More Information

14. Experiential Learning

Playing with Timelines

Task One: Parsing crontab Files

Task Two: Displaying the Timeline

Task Three: Writing Out the Correct XML File

Putting It All Together

Summary: What Can We Learn from This?

Playing with Geocoding

Geocoding from Postal Addresses

Geocoding from IP Addresses

Summary: What Can We Learn from This?

Playing with an MP3 Collection

Summary: What Can We Learn from This?

One Final Exploration

Part One: Retrieving the Wiki Page with WWW::Mechanize

Part Two: Extracting the Data

Part Three: Geocoding and Mapping the Data

Summary: What Can We Learn from This?

Remember to Play

Module Information for This Chapter

Source Material for This Chapter

A. The Eight-Minute XML Tutorial

B. The 10-Minute XPath Tutorial

C. The 10-Minute LDAP Tutorial

D. The 15-Minute SQL Tutorial

E. The Five-Minute RCS Tutorial

F. The Two-Minute VBScript-to-Perl Tutorial

G. The 20-Minute SNMP Tutorial

Index

David N．Blank-Edelman是美国东北大学计算机与信息科学学院的技术主任，拥有25年在多种平台上的系统／网络管理员经验。

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FAT filesystems are case-insensitive. In Unix, an attempt to open a file using thewrong case （i.e., MYFAVORITEFILE versus myfavoritefile） will fail, but with FATor VFAT, this will succeed with no problem.

Instead of a forward slash, FAT uses the backward slash （） as its path separator.This has a direct ramification for the Perl programmer, because the backslash is aquoting character in Perl. Paths written in single quotes with only single separators（e.g, Spathe' dirdirfilename'） are just fine. However, situations in which youneed to place multiple backslashes next to each other （e.g, serverdirfile） arepotential trouble. In those cases, you have to be vigilant in doubling any multiplebackslashes. Some Perl functions and some Perl modules will accept paths withforward slashes, but you shouldn't count on this convention when programming.

It is better to bite the bullet and write winnttemp than to learn that yourcode breaks because the conversion hasn't been done for you.

FAT files and directories have special flags associated with them that are calledattributes. Example attributes include "Read-only" and "System."

The root of a FAT filesystem is specified starting with the drive letter on which thefilesystem resides. For instance, the absolute path for a file might be specified asc : homecindydocsresumecurrent.doc.

FAT32 and NTFS filesystems have the same semantics as VFAT filesystems. They sharethe same support for long filenames and use the same root designator. NTFS is moresophisticated in its name support, however, because it allows these names to be specified using Unicode. Unicode is a multibyte character encoding scheme that can be usedto represent all of the characters of all of the written languages on the planet.NTFS also has some functional differences that distinguish it from the other Windowsand basic Unix filesystems. Later in this chapter, we will write some code to take advantage of some of these differences, such as filesystem quotas. NTFS supports ACLs,which provide a fine-grained permission mechanism for file and directory access.

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“直到系统管理员阅读本书前，存在太多的任务本可以(并且应该)自动化完成但却没有。Peri是一种强大的工具，David向我们展示了如何让系统管理员付出更少劳动就能将系统掌控得更好。” 　　——Peter Baer Galvin，Corporate Technologies 公司首席技术官、IT架构师

前言

.

书籍介绍

《使用 Perl实现系统管理自动化(第2版)(影印版)》内容简介：如果你从事任何系统管理方面的工作，就必须应对日益复杂的工作环境以及对你的时间不断增加的需求。《使用Perl实现系统管理自动化 第二版》不仅提供了可用于工作的恰当工具，还给出了许多建议，帮助你解决特定问题以及安全地自动处理重复事务。这一版的“水獭书”经过更新和扩充，涵盖了最新的操作系统、技术和Perl模块，将会帮助你：

* 管理用户账户

* 监测文件系统和进程

* 处理XML和YAML等格式的配置文件

* 使用DBI管理数据库，包括MySQL、MS SQL和Oracle

* 处理LDAP和Active Directory等目录服务

* 编写脚本管理电子邮件协议和垃圾邮件

* 高效地创建、处理和分析日志文件

* 管理网络名称和配置服务，包括NIS、DNS和DHCP

* 维护、监测和映射网络服务

* 提高文件系统、进程和网络的安全性

这一版的附录中还包含了额外内容，帮助你快速掌握XML/XPath、LDAP、SNMP和SQL等技术。《使用 Perl实现系统管理自动化(第2版)(影印版)》在手并结合Perl，你将花费更少的资源，付出更少的劳动，大大减少烦恼，让你事半功倍。