Hands-on Guide to the Red Hat Exams
Addison-Wesley Educational Publishers Inc (Verlag)
978-0-321-76795-0 (ISBN)
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Assess your knowledge and focus your learning.
Get the practical workplace knowledge you need!
Start-to-finish RHCSA™ and RHCE® preparation from leading Linux system administrator, IT trainer, and certification expert Damian Tommasino!
Master every RHCSA™ and RHCE® topic!
Red Hat Enterprise Linux 6 local and network installation
System services, runlevels, and bootup
Disks, partitions, and file systems, including LUKS encryption
Networking
Package management
User administration
Logging, monitoring, and automation
Kernel updates and tuning
Security, including SELinux, firewalls, and policies
Remote access, including SSH
Apache, Squid, DNS, DHCP, NTP, and email
NFS and Samba
Client and network troubleshooting
KVM virtualization
Test your knowledge, build your confidence, and succeed!
22 hands-on RHCSA™ and RHCE® Labs, each with multiple real-world tasks
Downloadable troubleshooting scripts
Practical tutorials and real-world tips
Exam tips
Red Hat Enterprise Linux 6 Command Quick Reference
Exclusive Red Hat exam prep advice and task lists
Two full length lab-based practice exams
Damian Tommasino (RHCE, RHCSA, MCSA, CCNA, CCENT, MCP, Security+, Network+, A+) is a Linux system administrator at TradeCard and CEO of Modular Learning Inc., an online IT training company. He blogs on Red Hat, Linux, and security at Security Nut (http://secnut.blogspot.com), and actively contributes to the popular IT exam certification forums at techexams.net.
Damian Tommasino is currently a Linux system administrator at TradeCard and CEO of Modular Learning, Inc., an online IT training company. His current certifications include RHCE, RHCSA, MCSA, CCNA, CCENT, MCP, Security+, Network+, and A+. He has a popular blog called Security Nut (http://secnut.blogspot.com) that covers Red Hat, Linux, security, and more. Damian also spends time over at techexams.net helping out in the forums and conversing with friends.
Preface xvi
Introduction 3
Chapter 1 Installation 29
Starting the Installation 29
An Older Install with RHEL5 33
The Firstboot Process 37
Verifying the Installation 40
Summary 41
Review Questions 42
Answers to Review Questions 42
Chapter 2 System Initialization 47
The Boot Process 47
Working with GRUB 51
The Config File 52
The GRUB Command Line 54
Runlevels 55
Runlevel Utilities 56
Rescue and Recovery Runlevels 59
Service Management 59
The Upstart Conversion 64
Summary 66
Review Questions 66
Answers to Review Questions 67
Chapter 3 Disks and Partitioning 71
Basic Partitions 71
Creating a Partition 75
Making a Swap Partition 81
Deleting a Partition 83
Logical Volume Manager 85
Creating an LVM Partition 89
Adjusting the Size of LVM Partitions 93
Migrating Data 96
Deleting an LVM Partition 99
Setting Up RAID 101
Creating a RAID Array 102
What to Do When a Disk Fails 105
Deleting a RAID Array 108
Summary 109
Review Questions 109
Answers to Review Questions 109
Chapter 4 File Systems and Such 113
File System Setup 113
Creating a File System 114
Creating a Swap 116
Mounting a File System 119
Extra File System Commands 125
Encryption with LUKS 128
Creating Encrypted Partitions 129
Mounting LUKS at Boot 132
Managing File System Quotas 132
Setting Up Quotas 132
Enabling Quotas 134
Quota Usage Reports 137
File System Security 137
Setting Up ACLs 138
GnuPG 141
Using AutoFS 141
Summary 144
Review Questions 144
Answers to Review Questions 145
Chapter 5 Networking 149
Setting Up Networking 149
Static IP Addresses 151
Routing 155
Creating Static Routes 156
Troubleshooting Network Connections 156
Networking Utilities 157
Network Monitoring and Analysis 159
Advanced Networking 160
Ethernet Bonding 160
Client DNS Troubleshooting 161
Summary 164
Review Questions 165
Answers to Review Questions 165
Chapter 6 Package Management 169
Working with RPM 169
Installing and Removing Packages 170
Querying and Verifying Packages 172
Doing It Again with Yum 177
Installing and Removing Packages 178
Searching for Packages 182
Configuring Additional Repositories 183
Making Your Own RPM 184
Creating an RPM 185
Creating Your Own Repository 188
Adding Your Custom Packages 190
The Red Hat Network 190
Registering Your System 191
Summary 191
Review Questions 192
Answers to Review Questions 192
Chapter 7 User Administration 195
Users and Groups 195
Users 196
Passwords 199
The Password File 200
The Shadow File 201
Groups 204
The Group File 204
Switching Accounts 206
User Account Initialization 207
User-Specific Files 207
Global User Configuration 208
Group Collaboration 209
Network User Authentication 211
Summary 215
Review Questions 215
Answers to Review Questions 216
Chapter 8 Network Installs 221
Kickstart Server Setup 221
Firewall and SELinux Configuration 224
Mastering Kickstart Config Files 225
Post Install 227
Advanced Partitioning 227
Automating Kickstart 228
TFTP Server 229
PXE Boot 232
Firewall and SELinux Configuration 233
Other Network Installs 234
Summary 235
Review Questions 235
Answers to Review Questions 236
Chapter 9 System Logging, Monitoring, and Automation 239
Working with Syslog 239
The Config File 241
Log Rotation 243
Centralized Logging 244
Centralized Logging (The RHEL5 Way) 246
User Login Events 247
Monitoring System Performance 248
Automation with cron and at 252
Creating cron Jobs 254
Single Jobs with at 258
Summary 261
Review Questions 261
Answers to Review Questions 262
Chapter 10 The Kernel 265
Kernel Basics 265
Updating the Kernel 268
Tuning the Kernel with /proc/sys 272
Summary 274
Review Questions 275
Answers to Review Questions 275
Chapter 11 SELinux 277
Understanding SELinux 277
Configuring SELinux 279
File Contexts 279
Service and Boolean Options 283
SELinux Troubleshooting 286
Policy Violations 286
Summary 287
Review Questions 287
Answers to Review Questions 288
Chapter 12 System Security 291
Security Through TCP Wrappers 291
Firewall Rules Using iptables 293
Configuring iptables 294
Troubleshooting Firewall Rules 299
Working with NAT 300
Pluggable Authentication Module 301
Securing Access 301
PAM Troubleshooting 303
Managing Password Policies 304
Summary 305
Review Questions 305
Answers to the Review Questions 306
Chapter 13 Remote Access 309
Secure SHell (SSH) 309
Configuring SSH 310
Firewall and SELinux Configuration 313
SSH Security 314
Troubleshooting SSH 315
SSH Security Revisited 315
Public/Private Keys 316
Port Forwarding 317
VNC Servers 318
Connecting Clients 320
Summary 321
Review Questions 321
Answers to Review Questions 321
Chapter 14 Web Services 325
The Apache Web Server 325
Installing Apache 325
Configuring the Web Server 326
Firewall and SELinux Configuration 329
Troubleshooting Apache 332
Apache Security 334
Host-Based Security 334
User-Based Security 336
Setting Up HTTPS 339
CGI Applications 341
Virtual Hosts 342
Squid Web Proxy 343
Installing Squid 344
Configuring the Proxy 344
Firewall and SELinux Configuration 345
Web Proxy Security 346
Summary 347
Review Questions 347
Answers to Review Questions 348
Chapter 15 NFS 351
Network File Systems 351
Installing an NFS Server 352
Configuring NFS 353
Firewall and SELinux Configuration 358
NFS Security 360
Troubleshooting NFS 361
Connecting Clients 364
Summary 366
Review Questions 366
Answers to Review Questions 366
Chapter 16 Samba 369
Samba 369
Configuring Samba 370
Samba Security 377
Samba Clients 377
Summary 379
Review Questions 380
Answers to Review Questions 380
Chapter 17 FTP 383
File Transfer Protocol 383
Installing an FTP Server 384
Configuring vsftp 384
Firewall and SELinux Configuration 386
FTP Security 388
Troubleshooting FTP 389
Summary 390
Review Questions 390
Answers to Review Questions 391
Chapter 18 DNS 393
Setting Up BIND 393
Firewall and SELinux Configuration 394
Configuring a DNS Server 396
Master Server 397
Slave Server 401
Caching-Only Server 404
Forwarding-Only Server 406
DNS Utilities and Troubleshooting 406
BIND Security 412
Summary 417
Review Questions 417
Answers to Review Questions 418
Chapter 19 Network Services 421
Xinetd: The Master Service 421
Dynamic Host Configuration Protocol 426
Installing a DHCP Server 426
Configuring the DHCP Server 427
Security Configuration 431
Troubleshooting DHCP 432
Network Time Protocol 433
Installing a Time Server 434
Configuring NTP 434
Firewall and SELinux Configuration 436
NTP Security 437
Troubleshooting NTP 438
Summary 439
Review Questions 439
Answers to Review Questions 439
Chapter 20 Email Services 443
Email Service Overview 443
SMTP with Postfix 443
Configuring Postfix 445
Firewall and SELinux Configuration 449
Postfix Security 450
Alias Mapping 451
Receiving Mail with Dovecot 452
Configuring Dovecot 452
Firewall and SELinux Configuration 453
Dovecot Security 454
Testing the Mail Server 456
Summary 458
Review Questions 459
Answers to Review Questions 459
Chapter 21 Troubleshooting 463
Boot Issues 463
I Lost My Root User Password 463
Password Change Not Available in Single-User Mode 464
The MBR Is Corrupt 464
The Partition or Root File System Can’t Be Found 465
Troubleshooting File Systems 466
The System Complains About a File System Label 466
The Superblock Has Become Corrupt 466
Users Can’t Create Files in Their Home Directories 467
Miscellaneous 468
I Can’t Remote into My System 468
I Can’t Access Service X 468
When I Start a Service, It Tells Me “Cannot Bind to Address” 469
I Get the Error Message “No Route to Host” 469
My Ping to Another Host Has Failed 470
Summary 470
Chapter 22 Virtualization with KVM 473
Working with Virtual Machines 473
Setting Up the Physical Host 473
Installing a Virtual Client 474
Managing a Virtual Client 477
Monitoring Virtual Resources 479
Summary 480
Review Questions 480
Answers to Review Questions 481
Lab Exam 1 483
Lab Exam 2 485
Index 486
TOC, 9780321767950, 3/15/2011
| Erscheint lt. Verlag | 5.5.2011 |
|---|---|
| Verlagsort | New Jersey |
| Sprache | englisch |
| Maße | 235 x 196 mm |
| Gewicht | 1028 g |
| Themenwelt | Informatik ► Betriebssysteme / Server ► Unix / Linux |
| ISBN-10 | 0-321-76795-0 / 0321767950 |
| ISBN-13 | 978-0-321-76795-0 / 9780321767950 |
| Zustand | Neuware |
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