Red Hat Linux Networking and System Administration

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ISBN: 9780764599491 | 0764599496
Cover: Paperback
Copyright: 10/21/2005

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Starts with the basics of Red Hat, the leading Linux distribution in the U.S., such as network planning and Red Hat installation and configuration Offers a close look at the new Red Hat Enterprise Linux 4 and Fedora Core 4 releases New chapters cover configuring a database server, creating a VNC server, monitoring performance, providing Web services, exploring SELinux security basics, and exploring desktops Demonstrates how to maximize the use of Red Hat Network, upgrade and customize the kernel, install and upgrade software packages, and back up and restore the file system The four CDs contain the full Fedora Core 4 distribution

Preface

Acknowledgments

Part One System and Network Administration Defined

(202)

Duties of the System Administrator

(10)

The Linux System Administrator

(2)

Installing and Configuring Servers

(1)

Installing and Configuring Application Software

(1)

Creating and Maintaining User Accounts

(1)

Backing Up and Restoring Files

(2)

Monitoring and Tuning Performance

(1)

Configuring a Secure System

(2)

Using Tools to Monitor Security

(1)

Summary

(1)

Planning the Network

(16)

Deciding How Your Network Will Be Used

(8)

Understanding Topologies

(1)

Star Topology

(1)

Bus Topology

(1)

Ring Topology

(1)

Tree Topology

(1)

Client-Server or Peer-to-Peer?

(1)

What's in the Mix?

(1)

Determining System Requirements

(1)

Planning and Implementing Security

(2)

Addressing External and Internal Threats

(1)

Formulating a Security Policy

(1)

An Effective Password Policy

(1)

General Security Rules

(1)

Security Updates

(1)

An Appropriate Firewall System

(1)

Planning for Recovery from Disasters

(3)

Clustering Solutions

(1)

Disaster Recovery

(1)

Writing It Down: Good Records Can Save Your Job

(2)

Summary

(1)

Standard Installation

(42)

Exploring Your PC's Components

(4)

Processor

(1)

Bus

(1)

Memory

(1)

Video Card and Monitor

(1)

Hard Drive

(1)

Floppy Disk Drive

(1)

Keyboard and Mouse

(1)

SCSI Controller

(1)

CD/DVD-R/RW Drive

(1)

Sound Card

(1)

Network Card

(1)

Checking for Supported Hardware

(1)

Creating the Red Hat Boot Disk

(1)

Starting the Installation

(6)

Partitioning the Hard Disk

(3)

Using Disk Druid to Partition Your Disks

(6)

Naming Disks and Devices

(1)

Mounting a File System

(1)

Understanding the Swap Partition

(1)

Preparing Disk Partitions

(2)

Setting Up the Partitions

(2)

Configuring the Installation

(11)

Installing the Boot Loader

(3)

Configuring the Network

(2)

Configuring the Firewall

(2)

Choosing Additional Languages

(1)

Setting the Time Zone

(2)

Setting the Root Password

(1)

Selecting the Package Groups to Install

(3)

Running Firstboot

(5)

Summary

(1)

Kickstart Installation

(26)

Using the Kickstart Configurator

(1)

Installing the Kickstart Configurator

(21)

Boot Loader Options Screen

(1)

Partition Information Screen

(5)

Network Configuration

(1)

Authentication

(2)

Firewall Configuration

(1)

Display Configuration

(3)

Package Selection

(1)

Pre-Installation Script

(1)

Post-Installation Script

(1)

Starting the Kickstart Installation

(3)

Creating a Bootable Floppy

(1)

Creating a Bootable CD-ROM

(1)

Starting a Kickstart Installation

(1)

Summary

(1)

Exploring the Desktops

(30)

Examining the Graphical Login Screen

(2)

Logging In and Using the GNOME Desktop

(11)

Playing with the Panel

101

(1)

Managing Applets on the Panel

102

(1)

Choosing Items from the Applications Menu in Fedora Core

103

(2)

Choosing Items from the Places Menu in Fedora Core

105

(1)

Choosing Items from the Desktop Menu in Fedora Core

106

(1)

Choosing Items from the Applications Menu on Enterprise Linux

107

(2)

Choosing Actions from the Actions Menu in Enterprise Linux

109

(1)

Using the Nautilus File Manager

110

(8)

Displaying Your Home Folder

112

(1)

Displaying the Contents of a Folder

112

(1)

Opening Files

112

(1)

Accessing FTP Sites

113

(1)

Using Bookmarks

113

(1)

Adding a Bookmark

113

(1)

Editing Bookmarks

113

(1)

Deleting Bookmarks

114

(1)

Managing Your Files and Folders

114

(1)

Customizing the Nautilus File Manager

115

(1)

Editing File Manager Preferences

115

(2)

Changing the File Manager Background and Icon Emblems

117

(1)

Showing and Hiding Views

118

(1)

Configuring GNOME

118

(1)

Logging Out

119

(1)

Taking a Look at KDE

119

(5)

Managing Applets

121

(1)

Choosing Applications from the Applications Menu

122

(2)

Using the Konqueror File Manager

124

(2)

Logging Out of KDE

126

(1)

Summary

126

(1)

System Startup and Shutdown

127

(14)

Examining the Boot Process

128

(8)

The Boot Loader

128

(2)

Using GRUB during Boot

130

(2)

The Kernel

132

(1)

The/sbin/init Program

133

(3)

Exploring Runlevels

136

(1)

Changing the System Runlevel

136

(1)

Starting Programs at System Boot

137

(1)

Shutting Down the System

138

(1)

GRUB Configuration File

139

(1)

Summary

140

(1)

The File System Explained

141

(22)

Understanding the File System Structure

141

(3)

The/Directory

143

(1)

Working with Linux-Supported File Systems

144

(5)

ext3

145

(1)

ext2

146

(1)

reiserfs

146

(1)

SystemV

147

(1)

ufs

147

(1)

FAT

147

(1)

NTFS

147

(1)

IBM JFS

147

(1)

SGI XFS

148

(1)

Nonstandard Linux File Systems

148

(1)

FREEVxFS

148

(1)

GFS

148

(1)

Memory and Virtual File Systems

149

(6)

cramfs

149

(1)

tmpfs

149

(1)

ramfs

150

(1)

romfs

150

(1)

proc

150

(1)

Proc Software Information

150

(2)

Proc Hardware Information

152

(2)

/dev/pts

154

(1)

devfs

154

(1)

sysfs

155

(1)

Linux Disk Management

155

(6)

Disk Partitioning on an x86 Machine

155

(1)

Mounting Other OS Partitions/Slices

155

(1)

Metadevices

156

(1)

Logical Volumes

156

(4)

RAID

160

(1)

Summary

161

(2)

Examining the System Configuration Files

163

(40)

Examining the System Configuration Files

164

(11)

Systemwide Shell Configuration Scripts

164

(1)

Shell Config Scripts: bashrc, csh.cshrc, zshrc

165

(2)

bash, tcsh, zsh, and Their Config File Read Orders

167

(1)

System Environmental Settings

168

(1)

/etc/motd

168

(1)

issue

168

(1)

issue.net

168

(1)

aliases

169

(1)

fstab

169

(1)

grub.conf

170

(1)

cron files

171

(1)

syslog.conf

172

(2)

ld.so.conf

174

(1)

logrotate.conf

174

(1)

Examining the /etc/sysconfig/Directory

175

(13)

/etc/sysconfig/apmd

176

(1)

/etc/sysconfig/authconfig

177

(1)

/etc/sysconfig/clock

177

(1)

/etc/sysconfig/crond

178

(1)

/etc/sysconfig/desktop

178

(1)

/etc/sysconfig/firstboot

178

(1)

/etc/sysconfig/grub

178

(1)

/etc/sysconfig/harddisks

178

(1)

/etc/sysconfig/hwconf

179

(1)

/etc/sysconfig/i18n

179

(1)

/etc/sysconfig/init

179

(1)

/etc/sysconfig/iptables

180

(1)

/etc/sysconfig/irda

181

(1)

/etc/sysconfig/kernel

181

(1)

/etc/sysconfig/keyboard

181

(1)

/etc/sysconfig/kudzu

182

(1)

/etc/sysconfig/mouse

182

(1)

/etc/sysconfig/named

183

(1)

/etc/sysconfig/netdump

183

(1)

/etc/sysconfig/network

184

(1)

/etc/sysconfig/ntpd

184

(1)

/etc/sysconfig/pcmcia

184

(1)

/etc/sysconfig/selinux

185

(1)

/etc/sysconfig/system-config-users

185

(1)

/etc/sysconfig/system-logviewer

185

(1)

/etc/sysconfig/samba

186

(1)

/etc/sysconfig/sendmail

186

(1)

/etc/sysconfig/vncservers

186

(1)

/etc/sysconfig/xinetd

187

(1)

Directories in the /etc/sysconfig/ Directory

187

(1)

apm-scripts

187

(1)

daemons

187

(1)

networking

187

(1)

network-scripts

188

(1)

rhn

188

(1)

Examining the Network Configuration Files

188

(8)

Files to Change When Setting Up a System or Moving the System

188

(1)

Setting Up the IP Address

189

(1)

Setting Up the Hostname

190

(1)

Setting Up the DNS Name Resolution

190

(1)

Making a Local File of Hostname to IP Address Mappings

191

(1)

Setting Up Name Service Resolution Order

192

(1)

Starting Up Network Services from xinetd

193

(1)

Starting Up Network Services from the rc Scripts

194

(1)

Other Important Network Configuration Files in the /etc/sysconfig Directory

195

(1)

static-routes

195

(1)

Iptables

195

(1)

Network Configuration Files in /etc/sysconfig/network-scripts

196

(1)

ifcfg-networkinterfacename

196

(1)

ifup and ifdown

196

(1)

Managing the init Scripts

196

(6)

Managing rc Scripts by Hand

198

(2)

Managing rc Scripts Using chkconfig

200

(2)

Summary

202

(1)

Part Two Network Services

203

(224)

Managing the X Window System

205

(12)

Configuring the X Server with the X Configuration Tool

205

(5)

Changing the Display Resolution

206

(1)

Changing the Display Color Depth

207

(1)

Changing Monitor Type Settings

207

(1)

Changing Your Video Card Type

208

(1)

Configuring Dual Monitors

209

(1)

Manually Configuring Your X Server

210

(5)

The X Server Configuration File

210

(5)

Summary

215

(2)

Configuring Printers

217

(12)

Configuring Printers with the Printer Configuration Tool

217

(8)

Configuring the Print Queue

219

(5)

Selecting the Print Driver

224

(1)

Editing the Printer Configuration

225

(2)

Deleting a Printer

227

(1)

Setting the Default Printer

227

(1)

Managing Print Jobs

227

(1)

Summary

228

(1)

TCP/IP Networking

229

(36)

TCP/IP Explained

229

(2)

Understanding Network Classes

231

(2)

Setting Up a Network Interface Card (NIC)

233

(5)

Configuring the Network Card

234

(1)

Configuring an Internal Network

235

(3)

Understanding Subnetting

238

(8)

Interpreting IP Numbers

240

(1)

Before You Subnet Your Network

241

(3)

Classless InterDomain Routing

244

(2)

Working with Gateways and Routers

246

(1)

Configuring Dynamic Host Configuration Protocol

247

(3)

Setting Up the Server

248

(2)

Configuring the DHCP Client

250

(1)

Configuring the Network Using the Network Configuration Tool

250

(9)

Adding an Ethernet Device

251

(3)

Adding a Wireless NIC

254

(2)

Adding a Modem Connection

256

(3)

Editing Your Network Configuration

259

(4)

Removing a NIC

259

(1)

Changing the NIC Configuration

260

(1)

Managing DNS Settings

261

(1)

Managing Hosts

261

(1)

Working with Profiles

262

(1)

Configuring IP Masquerading

263

(1)

Summary

263

(2)

The Network File System

265

(44)

NFS Overview

265

(6)

Understanding NFS

266

(2)

What's New with NFSv4?

268

(1)

NFS Advantages and Disadvantages

269

(2)

Planning an NFS Installation

271

(2)

Configuring an NFS Server

273

(23)

NFS Server Configuration and Status Files

274

(9)

NFS Server Daemons

283

(2)

NFS Server Scripts and Commands

285

(5)

Using Secure NFS

290

(1)

Example NFS Server

290

(2)

Using the NFS Server Configuration Tool

292

(4)

Configuring an NFS Client

296

(5)

Configuring an NFSv4 Client

299

(1)

Example NFS Client

300

(1)

Using Automount Services

301

(4)

Examining NFS Security

305

(3)

General NFS Security Issues

305

(1)

Server Security Considerations

306

(1)

Client Security Considerations

307

(1)

Summary

308

(1)

The Network Information System

309

(30)

Understanding NIS

309

(2)

Planning an NIS Installation

311

(4)

Configuring an NIS Server

315

(11)

Key Files and Commands

315

(6)

Starting the NIS Password Daemon

321

(1)

Starting the Server Transfer Daemon

321

(1)

Starting the NIS Servers at Boot Time

322

(2)

Configuring an Example NIS Server

324

(2)

Configuring an NIS Client

326

(8)

Setting the NIS Domain Name

326

(1)

Configuring and Starting the Client Daemon

326

(5)

Configuring the Client Startup Files

331

(1)

NIS Client Commands

331

(2)

Configuring an Example NIS Client

333

(1)

Using NIS and NFS Together

334

(3)

Summary

337

(2)

Connecting to Microsoft and Novell Networks

339

(12)

Installing Samba

340

(1)

Configuring the Samba Server

341

(3)

[global]

342

(1)

[homes]

343

(1)

[printers]

344

(1)

Creating Samba Users

344

(1)

Starting the Samba Server

345

(1)

Connecting to a Samba Client

345

(2)

Connecting from a Windows PC to the Samba Server

347

(1)

Connecting to Novell Networks

348

(2)

Summary

350

(1)

Configuring a Database Server

351

(30)

Linux Database Servers

351

(2)

Using MySQL

353

(9)

Securing the MySQL Installation

355

(4)

Using the MySQL Client Programs

359

(3)

Using PostgreSQL

362

(17)

Verifying the PostgreSQL Installation

365

(1)

Finalizing the PostgreSQL Installation

366

(1)

Initializing the Installation

366

(2)

Modifying Access Privileges

368

(4)

Creating a Test Database

372

(2)

Testing Connectivity to the Test Database

374

(1)

Using the PostgreSQL Client Programs

375

(4)

Summary

379

(2)

Creating a VNC Server

381

(12)

What Is VNC?

381

(2)

Setting Up a VNC Server

383

(5)

Configuring Your Firewall for VNC

384

(2)

Customizing the VNC Server

386

(2)

Testing the VNC

388

(4)

Summary

392

(1)

Providing Additional Network Services

393

(22)

Configuring a Time Server

394

(12)

Selecting a Time Server Solution

395

(1)

Configuring the Time Server

396

(1)

Selecting Reference Clocks

397

(4)

Configuring an NTP Client

401

(4)

Playing Nicely and Wisely with NTP

405

(1)

Providing a Caching Proxy Server

406

(8)

Verifying the Kernel Configuration

408

(1)

Configuring Squid

409

(2)

Modifying Netfilter

411

(1)

Starting Squid

412

(1)

Testing the Configuration

412

(2)

Summary

414

(1)

Optimizing Network Services

415

(12)

Optimizing the X Window System

416

(2)

Optimizing NFS

418

(5)

Optimizing NIS

423

(1)

Optimizing Samba Networking

423

(1)

Getting More from a Database Server

424

(1)

Summary

425

(2)

Part Three Internet Services

427

(168)

What Are Internet Services?

429

(14)

Learning about Secure Services

430

(4)

SSH

430

(1)

scp

431

(2)

sftp

433

(1)

Less Secure Services

434

(2)

Telnet

434

(1)

FTP

434

(1)

rsync

435

(1)

rsh

435

(1)

rlogin

435

(1)

finger

435

(1)

talk and ntalk

435

(1)

Using Your Linux Machine as a Server

436

(1)

HTTP

436

(1)

sshd

436

(1)

ftpd

436

(1)

DNS

437

(1)

Configuring the xinetd Server

437

(2)

Comparing xinetd and Standalone

439

(2)

xinetd-Started Services

439

(1)

Standalone Services

440

(1)

Configuring Linux Firewall Packages

441

(1)

Summary

441

(2)

Configuring BIND: The Domain Name System

443

(24)

Understanding DNS

443

(3)

Installing the Software

446

(1)

Understanding Types of Domain Servers

447

(2)

Examining Server Configuration Files

449

(12)

The named.conf file

450

(1)

Options

451

(3)

Include

454

(1)

Acl

455

(1)

Logging

455

(2)

server

457

(1)

zones

457

(1)

Zone Files

458

(1)

SOA --- Start of Authority

459

(1)

The Reverse Zone File

460

(1)

Configuring a Caching DNS Server

461

(1)

Configuring a Secondary Master DNS Server

462

(1)

Configuring a Primary Master Server

462

(2)

Checking Your Configuration

464

(2)

The Host Program

464

(1)

The dig Program

465

(1)

Summary

466

(1)

Configuring Mail Services

467

(24)

Email Explained

467

(3)

Tracing the Email Delivery Process

468

(1)

Mail User Agent (MUA)

468

(1)

Mail Transfer Agent (MTA)

469

(1)

Mail Delivery Agent (MDA)

469

(1)

Introducing SMTP

470

(2)

Understanding POP3

471

(1)

Understanding IMAP4

471

(1)

Configuring Sendmail

472

(7)

Configuring Sendmail

474

(1)

The m4 Macro Processor

475

(1)

Understanding and Managing the Mail Queue

476

(1)

Setting Up Aliases to Make Life Easier

476

(2)

Using Other Sendmail Files and Commands

478

(1)

Using the Postfix Mail Server

479

(5)

Switching to Postfix

479

(1)

Configuring Postfix

480

(2)

Running Postfix behind a Firewall or Gateway

482

(1)

Running Postfix on a Mail Host

483

(1)

Serving Email with POP3 and IMAP

484

(2)

Setting up an IMAP Server

485

(1)

Configuring Dovecot

485

(1)

Testing Cyrus

486

(1)

Maintaining Email Security

486

(3)

Protecting against Eavesdropping

487

(1)

Using Encryption

487

(1)

Using a Firewall

487

(1)

Don't Get Bombed, Spammed, or Spoofed

488

(1)

Be Careful with SMTP

488

(1)

Summary

489

(2)

Configuring FTP Services

491

(20)

Introducing vsftpd

492

(1)

Configuring vsftpd

493

(9)

Configuring User Level FTP Access

496

(1)

Configuring vsftpd Features

497

(4)

Disabling Anonymous FTP

501

(1)

Advanced FTP Server Configuration

502

(7)

Running vsftpd from xinetd

502

(1)

Enabling Anonymous Uploads

503

(1)

Enabling Guest User FTP Accounts

504

(3)

Running vsftpd over SSL

507

(2)

Using SFTP

509

(1)

Summary

510

(1)

Configuring a Web Server

511

(44)

Introducing Apache

511

(8)

Apache Features

512

(4)

Changes in Apache 2

516

(1)

How Web Servers Work

517

(2)

Configuring Apache

519

(21)

Apache's Startup Process

520

(1)

Configuring Global Behavior

521

(3)

Configuring the Default Server

524

(13)

Configuring Virtual Servers

537

(2)

Starting and Stopping Apache

539

(1)

Implementing SSI

540

(3)

Enabling CGI

543

(2)

Enabling PHP

545

(1)

Creating a Secure Server with SSL

546

(8)

Understanding SSL and Server Certificates

547

(2)

Creating a Self-Signed Certificate

549

(5)

Obtaining a Certificate from a Certification Authority

554

(1)

Summary

554

(1)

Providing Web Services

555

(26)

Creating Mailing Lists

555

(8)

Completing the Initial Mailman Configuration

556

(3)

Creating a Mailing List

559

(1)

Modifying a Mailing List's Configuration

560

(1)

Performing Common Mailman Administrative Tasks

561

(1)

Adding Multiple List Members

562

(1)

Hiding a Mailing List

562

(1)

Restricting Archives Access

563

(1)

Setting Up Web-Based Email

563

(4)

Connecting to SquirrelMail

563

(2)

Reconfiguring SquirrelMail

565

(2)

Configuring an RSS Feed

567

(7)

Selecting Content for an RSS Feed

570

(1)

Creating the Feed File

570

(2)

Turning on an RSS Feed

572

(2)

Adding Search Functionality

574

(5)

Getting Started with ht://Dig

574

(5)

Summary

579

(2)

Optimizing Internet Services

581

(14)

Optimizing LDAP Services

582

(1)

Optimizing DNS Services

583

(4)

Improving the Performance of DNS Clients

583

(2)

Tweaking DNS Servers

585

(1)

Logging

586

(1)

Optimizing Mail Services

587

(3)

Getting More from Sendmail

587

(1)

Getting More from Postfix

588

(2)

Optimizing FTP Services

590

(1)

Optimizing Web Services

590

(3)

Summary

593

(2)

Part Four System Administration

595

(238)

Keeping Your System Updated with up2date and the Red Hat Network

597

(18)

Using the Red Hat up2date Agent

598

(7)

Configuring the up2date Agent

599

(3)

Updating Your System

602

(3)

Registering Your System

605

(3)

Accessing the Red Hat Network with a Web Browser

608

(6)

Summary

614

(1)

Upgrading and Customizing the Kernel

615

(58)

Determining Whether to Upgrade to a New Kernel

616

(2)

Upgrading versus Customizing

618

(1)

Preparing to Upgrade

618

(1)

Installing a Kernel RPM

619

(1)

Getting the Kernel Source

620

(9)

Using the Kernel Source RPM

621

(2)

Using Pristine Kernel Source

623

(3)

Verifying and Unpacking the Archive

626

(1)

Patching the Kernel

627

(2)

Configuring the Kernel

629

(8)

Selecting a Kernel Configuration File

630

(3)

Configuring the Kernel with xconfig

633

(1)

Configuring the Kernel with menuconfig

634

(3)

Reviewing the Configuration Options

637

(23)

Code Maturity Level Options

637

(1)

General Setup

637

(3)

Loadable Module Support

640

(1)

Processor Type and Features

640

(3)

Power Management Options

643

(1)

Bus Options

643

(1)

Executable File Formats

644

(1)

Device Drivers

645

(1)

Generic Driver Options

645

(1)

Memory Technology Devices

645

(1)

Parallel Port Support

645

(1)

Plug and Play Support

646

(1)

Block Devices

646

(1)

ATA/ATAPI/MFM/RLL Support

647

(1)

SCSI Device Support

648

(1)

Old CD-ROM Drivers

648

(1)

Multidevice Support

649

(1)

Fusion MPT Device Support

649

(1)

IEEE 1394/FireWire Support

649

(1)

I2O Device Support

649

(1)

Networking Support

649

(4)

ISDN and Telephony

653

(1)

Input Device Support

653

(1)

Character Devices

654

(1)

I2C Support

654

(1)

Multimedia Devices

655

(1)

Graphics Support

655

(1)

Sound

656

(1)

USB Support

656

(4)

MMC/SD Card Support

660

(1)

InfiniBand Support

660

(1)

File Systems

660

(6)

CD-ROM/DVD File Systems

661

(1)

DOS/FAT/NT File Systems

661

(1)

Pseudo-File-Systems

662

(1)

Miscellaneous File Systems

662

(1)

Network File Systems

662

(1)

Partition Types

662

(1)

Native Language Support

663

(1)

Profiling Support

663

(1)

Kernel Hacking

664

(1)

Security Options

664

(1)

Cryptography Options

664

(1)

Library Routines

665

(1)

Saving the Kernel Configuration

665

(1)

Compiling the Kernel

666

(3)

Installing the Kernel

669

(1)

Updating GRUB

670

(1)

Summary

671

(2)

Configuring the System at the Command Line

673

(34)

Administrating Your System from the Command Line

673

(2)

Managing Processes

675

(8)

Obtaining Process Information

676

(4)

Signaling Processes

680

(2)

Modifying Process Priorities

682

(1)

Maintaining the File System

683

(13)

Working with File Systems

683

(1)

Creating and Manipulating Partitions

683

(2)

Creating and Manipulating File Systems

685

(6)

Working with Files and Directories

691

(4)

Managing Disk Space Usage

695

(1)

Timekeeping

696

(6)

Single-Use Commands

697

(5)

Using the Network Time Protocol

702

(1)

Automating Scripts

702

(3)

Running One-Shot Jobs with at

702

(2)

Running Regularly Scheduled Jobs with cron

704

(1)

Summary

705

(2)

Administering Users and Groups

707

(38)

Administering User Accounts

707

(23)

Working with User Accounts

708

(1)

The User Database Files

708

(7)

Modifying Multiple Accounts Simultaneously

715

(2)

Viewing Login and Process Information

717

(1)

Working with Group Accounts

718

(1)

Creating Groups

719

(1)

Modifying and Deleting Groups

720

(2)

Using a Shadowed Group File

722

(1)

Using User Private Groups

723

(2)

Administering Users and Groups with User Manager

725

(1)

Creating User Accounts

726

(1)

Modifying and Deleting User Accounts

727

(1)

Creating Group Accounts

728

(1)

Modifying and Deleting Group Accounts

729

(1)

Understanding the Root Account

730

(1)

Implementing Sudo

731

(6)

Deciphering Sudo's Configuration File

733

(4)

Sudo Configuration and Usage Tips

737

(1)

Using File System Quotas

737

(7)

Enabling Quotas

738

(1)

Creating the Quota Files

739

(1)

Turning on Quotas

740

(1)

Setting and Modifying Quotas

740

(2)

Viewing Quota Utilization

742

(2)

Summary

744

(1)

Installing and Upgrading Software Packages

745

(34)

Using the Red Hat Package Manager

745

(16)

General Options

746

(2)

Query Mode

748

(2)

Querying Package Dependencies

750

(1)

What's in That RPM?

751

(3)

Formatting Query Output

754

(1)

Package Installation and Removal

755

(1)

Installing RPMs

756

(1)

Upgrading RPMs

757

(1)

Removing RPMs

758

(1)

Verifying RPMs

758

(3)

Building Packages Using Source RPMs

761

(3)

Checking Software Versions

764

(3)

Obtaining Newer Software

767

(4)

Using Third-Party Sites to Find RPMs

768

(2)

Using Ibiblio.org

770

(1)

Installing Software from Source

771

(7)

Configuring the Build Environment

772

(1)

Unpacking the Source Code

772

(1)

Configuring the Source Code

773

(2)

Building the Software Package

775

(1)

Testing the Build

776

(1)

Installing the Software

777

(1)

Summary

778

(1)

Backing Up and Restoring the File System

779

(26)

Creating a Backup Plan

779

(2)

Choosing Media for Backups

781

(1)

Understanding Backup Methods

781

(2)

Tape Rotation

783

(1)

Using Backup Tools

784

(20)

Command Line Tools

784

(1)

Using mt-st

784

(3)

Using the cdrecord Package

787

(2)

Using dump

789

(1)

Using restore

790

(3)

Using tar

793

(2)

Advanced Tools

795

(1)

Using AMANDA

795

(9)

Summary

804

(1)

Performance Monitoring

805

(28)

System-Performance-Monitoring Tools

805

(1)

Measuring Memory Usage

806

(6)

Memory Usage as Seen by Users and Processes

806

(4)

Examining Kernel Memory Usage

810

(2)

Viewing Running Tasks

812

(10)

Getting Started with ps

813

(4)

Using top

817

(5)

Monitoring I/O Activity

822

(4)

Using sar

826

(5)

Monitoring Memory with sar

827

(2)

Monitoring CPU Usage with sar

829

(2)

Summary

831

(2)

Part Five System Security and Problem Solving

833

(72)

Exploring SELinux Security

835

(12)

Understanding SELinux

835

(3)

Mandatory and Role-Based Access Control

836

(2)

SELinux Policies

838

(1)

Using SELinux

838

(7)

Enabling SELinux Manually

842

(1)

Modifying the Targeted Policy

843

(2)

Finding More Information about SELinux

845

(1)

Summary

846

(1)

Implementing Network Security

847

(28)

Creating a Firewall

847

(4)

Installing, Configuring, and Using LDAP

851

(13)

Overview of LDAP Directory Organization

852

(3)

OpenLDAP Packages for Linux

855

(1)

Core OpenLDAP Server Files, Daemons, and Utilities

856

(1)

Configuring and Starting an OpenLDAP Server

857

(3)

Using OpenLDAP for System Authentication

860

(1)

Adding User, Password, and Group Entries to an LDAP Server

860

(1)

Updating Client Systems to Use LDAP Authentication

861

(3)

Installing, Configuring, and Using Kerberos

864

(10)

Kerberos Terminology, Machine Roles, and Reliability

865

(1)

Kerberos Packages for Linux

865

(1)

Core Kerberos Utilities

866

(1)

Installing and Configuring a Kerberos Server

867

(3)

Enabling Kerberos Clients and Applications

870

(1)

Using Kerberos for Login Authentication

871

(3)

Summary

874

(1)

Troubleshooting and Problem Solving

875

(30)

Troubleshooting Techniques

876

(2)

Step 1: Identify the Problem

876

(1)

Step 2: Reproduce the Problem

876

(1)

Step 3: Look for Changes

877

(1)

Step 4: Determine the Most Likely Cause

877

(1)

Step 5: Implement a Solution

878

(1)

Step 6: Keep Documentation

878

(1)

Troubleshooting Resources

878

(5)

The Internet

878

(1)

System Log Files

879

(3)

README Files

882

(1)

Solving Common Problems

883

(5)

Unable to Log In

883

(1)

Resetting a User's Password

883

(1)

Creating a User Account

883

(1)

Lost or Forgotten Root Password

884

(1)

CD-ROM Drive Not Detected during Installation

884

(1)

CD-ROM Drive Does Not Mount after Installation

885

(1)

Sound Does Not Work after Installation

885

(2)

Unable to Unmount a Drive

887

(1)

Shell Commands Don't Work

888

(1)

Solving File System Problems

888

(3)

Cannot Delete a File

889

(1)

Commands with Multiword Arguments

889

(1)

Accessing Windows File Systems

890

(1)

Working with Floppy Disks

890

(1)

Cannot Mount a Partition

891

(1)

Avoiding File System Checks at Each System Reboot

891

(1)

Solving Networking Problems

891

(5)

Getting Online with a Modern

893

(2)

The Boot Process Hangs

895

(1)

Using Two Ethernet Cards

896

(1)

Solving NFS Problems

896

(2)

Exploring Miscellaneous Problems

898

(6)

Solving Boot Problems

899

(1)

ht:/ /Dig Won't Run

900

(1)

Starting cyrus-imapd

900

(1)

Solving Laptop Video Problems

901

(1)

The Signal 7 and Signal 11 Problems

902

(1)

Using Screensavers and Power Management

903

(1)

Starting the X Window System

903

(1)

Making an Emergency Boot Disk

904

(1)

Summary

904

(1)

Appendix A Bash Shell Scripting

905

(38)

Using Wildcards and Special Characters

906

(3)

Using Variables

909

(4)

Using Bash Operators

913

(6)

Comparison Operators

913

(3)

Arithmetic Operators

916

(1)

File Test Operators

917

(2)

Understanding Flow Control

919

(9)

Conditional Execution Using if Statements

920

(2)

Determinate Loops Using the for Statement

922

(1)

Indeterminate Loops Using while and until Statements

923

(1)

Selection Structures Using case and select Statements

924

(1)

The case Statement

925

(1)

The select Statement

926

(2)

Using Shell Functions

928

(1)

Processing Input and Output

929

(5)

Redirecting I/O

929

(3)

String I/O

932

(2)

Working with Command Line Arguments

934

(2)

Using Processes and Job Control

936

(5)

Summary

941

(2)

Index

943

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Red Hat Linux Networking and System Administration

Summary

Author Biography

Table of Contents

Supplemental Materials