Produktbild: Linux Essentials for Cybersecurity
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Linux Essentials for Cybersecurity

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Beschreibung

Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

28.09.2024

Verlag

Pearson Studium

Seitenzahl

704

Maße (L/B/H)

25,4/20,3/3,8 cm

Gewicht

1460 g

Auflage

1. Auflage

Sprache

Englisch

ISBN

978-0-7897-5935-1

Beschreibung

Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

28.09.2024

Verlag

Pearson Studium

Seitenzahl

704

Maße (L/B/H)

25,4/20,3/3,8 cm

Gewicht

1460 g

Auflage

1. Auflage

Sprache

Englisch

ISBN

978-0-7897-5935-1

Herstelleradresse

Pearson
St.-Martin-Straße 82
81541 München
DE

Email: salesde@pearson.com

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  • Produktbild: Linux Essentials for Cybersecurity
  • Introduction xxix

    Part I: Introducing Linux 2

    Chapter 1 Distributions and Key Components 4

    Introducing Linux 4

    Linux Distributions 5

    Shells 6

    GUI Software 7

    Installing Linux 7

    Which Distro? 8

    Native or Virtual Machine? 9

    Installing a Distro 10

    Summary 12

    Key Terms 12

    Review Questions 12

    Chapter 2 Working on the Command Line 14

    File Management 14

    The Linux Filesystem 14

    Command Execution 16

    The pwd Command 16

    The cd Command 16

    The ls Command 17

    File Globbing 18

    The file Command 19

    The less Command 19

    The head Command 19

    The tail Command 20

    The mdkir Command 20

    The cp Command 20

    The mv Command 21

    The rm Command 21

    The rmdir Command 22

    The touch Command 22

    Shell Features 22

    Shell Variables 22

    Initialization Files 27

    Alias 28

    Command History 29

    Redirecting Input and Output 30

    Advanced Commands 33

    The find Command 33

    Regular Expressions 35

    The grep Command 36

    The sed Command 37

    Compression Commands 38

    Summary 40

    Key Terms 40

    Review Questions 41

    Chapter 3 Getting Help 42

    Man Pages 42

    Man Page Components 42

    Man Page Sections 43

    Man Page Locations 46

    Command Help Options 46

    The help Command 46

    The info Command 47

    The /usr/share/doc Directory 48

    Internet Resources 49

    Summary 50

    Key terms 50

    Review Questions 51

    Chapter 4 Editing Files 52

    The vi Editor 52

    What Is vim? 53

    Essential vi Commands 54

    Use Basic vi Modes 54

    Entering the Insert Mode 55

    Movement Commands 56

    Repeater Modifiers 57

    Undoing 57

    Copying, Deleting, and Pasting 58

    Finding Text 59

    Find and Replace 60

    Saving and Quitting 61

    Expand Your vi Knowledge 62

    Additional Editors 63

    Emacs 63

    gedit and kwrite 65

    nano and joe 65

    lime and bluefish 65

    Summary 66

    Key Terms 66

    Review Questions 66

    Chapter 5 When Things Go Wrong 68

    The Science of Troubleshooting 68

    Step 1: Gathering Information 69

    Step 2: Determine the Likely Cause 70

    Step 3: Document Your Plan of Attack (POA) 71

    Step 4: Perform the Actions 71

    Steps 5 and 6: Is the Problem Solved? 71

    Step 7: Are There Other Problems? 71

    Step 8: Store the Documentation 72

    Step 9: Prevent Future Problems 72

    Notifying Users 72

    Pre- and Post-login Messages 72

    Broadcasting Messages 77

    Summary 79

    Review Questions 79

    Part II: User and Group Accounts 80

    Chapter 6 Managing Group Accounts 82

    What Are Groups Used For? 82

    Primary versus Secondary Groups 82

    The /etc/group File 84

    Special Groups 85

    User Private Groups 86

    The /etc/gshadow File 88

    Managing Groups 90

    Creating Groups 90

    Modifying Groups 91

    Deleting Groups 91

    Adding Users to Groups 92

    Group Administrators 93

    Summary 93

    Key Terms 93

    Review Questions 94

    Chapter 7 Managing User Accounts 96

    The Importance of User Accounts 96

    User Account Information 96

    The /etc/passwd File 97

    Special Users 98

    The /etc/shadow File 99

    Managing Users 102

    Creating Users 102

    Modifying Users 105

    Managing GECOS 105

    Deleting Users 107

    Restricted Shell Accounts 107

    Network-Based User Accounts 108

    Using su and sudo 108

    Restricting User Accounts 111

    Summary 116

    Key Terms 116

    Review Questions 117

    Chapter 8 Develop an Account Security Policy 118

    Introducing Kali Linux 118

    Security Principles 119

    Creating a Security Policy 120

    Securing Accounts 120

    Physical Security 120

    Educating Users 121

    Account Security 121

    Security Tools 124

    The john and Johnny Tools 124

    The hydra tool 125

    Summary 126

    Review Questions 126

    Part III File and Data Storage 128

    Chapter 9 File Permissions 130

    Standard Permissions 130

    Viewing Permissions 130

    Files Versus Directories 131

    Changing Permissions 131

    Default Permissions 132

    Special Permissions 134

    SUID 134

    SGID 136

    Sticky Bit 138

    Access Control Lists (ACLs) 139

    The mask Value 141

    Default ACLs 141

    Changing Ownership 143

    chown 143

    chgrp 144

    File Attributes 145

    Introduction to SELinux 146

    Users Create Security Holes 146

    Daemon Processes Create Security Holes 146

    SELinux Essentials 147

    Summary 149

    Key Terms 150

    Review Questions 150

    Chapter 10 Manage Local Storage: Essentials 152

    Filesystem Essentials 152

    Partitions 152

    Filesystems 153

    Why So Many Partitions/Filesystems? 154

    Which Partitions/Filesystems Should Be Created? 155

    Filesystem Types 155

    Managing Partitions 156

    Ext-Based Filesystem Tools 161

    Xfs-Based Filesystem Tools 166

    Additional Filesystem Tools 170

    du 170

    df 170

    Mounting Filesystems 170

    The umount Command 171

    The mount Command 171

    Mounting Filesystems Manually 173

    Problems Unmounting Filesystems 174

    Mounting Filesystems Automatically 175

    Device Descriptors 176

    Mount Options 177

    Mounting Removable Media 179

    Swap Space 179

    Creating Swap Devices 180

    Summary 181

    Key Terms 181

    Review Questions 181

    Chapter 11 Manage Local Storage: Advanced Features 184

    Encrypted Filesystems 184

    Managing autofs 186

    Logical Volume Manager 189

    Logical Volume Manager Concepts 190

    LVM Essentials 192

    Using Logical Volumes and Additional LVM Commands 197

    Resizing Logical Volumes 201

    LVM Snapshots 204

    Disk Quotas 206

    Setting Up a Disk Quota for a Filesystem 207

    Editing, Checking, and Generating User Quota Reports 207

    Hard and Soft Links 210

    Why Use Links? 211

    Creating Links 211

    Displaying Linked Files 212

    Summary 212

    Key Terms 212

    Review Questions 212

    Chapter 12 Manage Network Storage 214

    Samba 214

    SAMBA Configuration 215

    SAMBA Server 218

    SAMBA Accounts 220

    Accessing SAMBA Servers 221

    Network File System 223

    Configuring an NFS Server 224

    Configuring an NFS Client 229

    iSCSI 230

    Summary 236

    Key Terms 236

    Review Questions 236

    Chapter 13 Develop a Storage Security Policy 240

    Developing the Plan 240

    Backing Up Data 241

    Creating a Backup Strategy 241

    Standard Backup Utilities 246

    Third-party Backup Utilities 250

    Summary 250

    Key Terms 251

    Review Questions 251

    Part IV: Automation 252

    Chapter 14 crontab and at 254

    Using crontab 254

    Configure User Access to the cron Service 256

    /etc/crontab 258

    /etc/anacrontab 260

    Using at 261

    atq 261

    atrm 262

    Configure User Access to at Services 262

    Summary 263

    Key Terms 263

    Review Questions 263

    Chapter 15 Scripting 264

    Linux Programming 264

    BASH Shell Scripting 265

    Perl Scripting 265

    Python Scripting 266

    Basics of BASH Scripting 268

    Conditional Expressions 269

    Flow Control Statements 271

    The while Loop 272

    The for Loop 272

    Loop Control 272

    The case Statement 272

    User Interaction 273

    Using Command Substitution 274

    Additional Information 274

    Summary 274

    Key Terms 274

    Review Questions 275

    Chapter 16 Common Automation Tasks 276

    Exploring Scripts that Already Exist on Your System 276

    The /etc/cron.* Directories 276

    Repositories 279

    Creating Your Own Automation Scripts 280

    Summary 281

    Key Terms 281

    Review Questions 281

    Chapter 17 Develop an Automation Security Policy 282

    Securing crontab and at 282

    Securing BASH Scripts 283

    Access to Scripts 283

    Script Contents 284

    Dealing with Data 284

    Shell Settings 284

    Shell Style 285

    Summary 285

    Review Questions 285

    Part V: Networking 286

    Chapter 18 Networking Basics 288

    Network Terminology 288

    IPv4 Versus IPv6 290

    IPv4 Addresses 292

    Determining a Network Address from an IP Address and Subnet 293

    Private IP Addresses 294

    Common Protocol Suites 294

    Network Ports 295

    Summary 297

    Key Terms 297

    Review Questions 297

    Chapter 19 Network Configuration 298

    Ethernet Network Interfaces 298

    Displaying Ethernet Port Configurations 299

    Changing Ethernet Port Settings 300

    Network Configuration Tools 301

    The arp Command 302

    The route Command 303

    The ip Command 304

    The hostname Command 305

    The host Command 305

    The dig Command 306

    The netstat Command 307

    Persistent Network Configurations 307

    The /etc/hostname File (Universal) 307

    The /etc/hosts File (Universal) 307

    The /etc/resolv.conf File (Universal) 308

    The /etc/nsswitch.conf File (Universal) 308

    The /etc/sysctl.conf File (Universal) 309

    The /etc/sysconfig/network File (Red Hat) 310

    The /etc/sysconfig/network-scripts/ifcfg-interface-name Files (Red Hat) 310

    The /etc/network/interfaces File (Debian) 311

    Network Troubleshooting Commands 311

    The ping Command 311

    The traceroute Command 312

    The netcat Command 313

    Access to Wireless Networks 314

    The iwconfig Command 314

    The iwlist Command 315

    Summary 316

    Key Terms 316

    Review Questions 317

    Chapter 20 Network Service Configuration: Essential Services 318

    DNS Servers 318

    Essential Terms 319

    How Name Resolution Works 320

    Basic BIND Configuration 322

    Zone Files 326

    Zone File Basics 326

    Zone File Entries in the /etc/named.conf File 327

    Zone File Syntax 328

    Zone Record Types 329

    Putting It All Together 333

    Slave BIND Servers 335

    Testing the DNS Server 336

    The dig Command 336

    Securing BIND 337

    Sending BIND to Jail 337

    Split BIND Configuration 340

    Transaction Signatures 341

    DHCP Server 343

    DHCP Configuration Basics 344

    Configuring Static Hosts 346

    DHCP Log Files 347

    Email Servers 347

    SMTP Basics 348

    Configuring Postfix 349

    Managing Local Email Delivery 353

    procmail Basics 354

    procmail Rules 355

    procmail Examples 357

    mbox and Maildir Formats 357

    Remote Email Delivery 358

    IMAP and POP Essentials 358

    The Dovecot Server 359

    Summary 362

    Key Terms 362

    Review Questions 362

    Chapter 21 Network Service Configuration: Web Services 364

    Apache Web Server 364

    Basic Apache Web Server Configuration 365

    Starting the Apache Web Server 366

    Apache Web Server Log Files 367

    Enable Scripting 367

    Apache Web Server Security 370

    Essential Settings 370

    User Authentication 372

    Virtual Hosts 372

    Configuring IP-Based Virtual Hosts 373

    Configuring Name-Based Virtual Hosts 373

    HTTPS 374

    SSL Essentials 375

    SSL Issues 375

    Self-Signing 376

    SSL and Apache 376

    SSL Server Certificate 377

    Apache SSL Directives 381

    Proxy Servers 382

    Tunneling Proxy 383

    Forward Proxy 383

    Reverse Proxy 383

    Squid Basics 384

    Nginx Configuration 387

    Client Configuration 389

    Summary 391

    Key Terms 391

    Review Questions 391

    Chapter 22 Connecting to Remote Systems 394

    LDAP 394

    Key LDAP Terms 395

    The slapd.conf File 397

    Starting the LDAP Server 399

    OpenLDAP Objects 401

    OpenLDAP Schemas 401

    OpenLDAP Database Changes 402

    Using the ldapdelete Command 404

    Using the ldapsearch Command 405

    Using the ldappasswd Command 407

    Connecting to an LDAP Server 408

    FTP Servers 408

    Configuring vsftpd 409

    Connecting to an FTP server 412

    Secure Shell 415

    Configuring the Secure Shell Server 416

    Secure Shell Client Commands 418

    Advanced SSH Features 421

    Summary 423

    Key Terms 423

    Review Questions 423

    Chapter 23 Develop a Network Security Policy 426

    Kernel Parameters 426

    The /etc/sysctl.conf File 426

    Ignoring ping Requests 427

    Ignoring Broadcast Requests 428

    Enabling TCP SYN Protection 428

    Disabling IP Source Routing 428

    TCP Wrappers 428

    Network Time Protocol 430

    Setting the System Clock Manually 430

    Setting the System Time Zone Manually 432

    Setting the System Date Using NTP 434

    Summary 436

    Key Terms 436

    Review Questions 436

    Part VI: Process and Log Administration 438

    Chapter 24 Process Control 440

    Viewing Processes 440

    The ps Command 440

    The pgrep Command 442

    The top Command 442

    The uptime Command 444

    The free Command 445

    Running Processes 445

    Pausing and Restarting Processes 446

    Killing Processes 447

    The kill Command 447

    The pkill Command 448

    The killall Command 448

    The xkill Command 449

    The nohup Command 450

    Process Priority 450

    The nice Command 450

    The renice Command 450

    Summary 451

    Key Terms 451

    Review Questions 451

    Chapter 25 System Logging 452

    Syslog 452

    The syslogd Daemon 452

    The /var/log Directory 453

    The /etc/syslog.conf File 454

    Creating Your Own /etc/syslog.conf Entry 457

    The logrotate Command 458

    The /etc/logrotate.conf File 458

    The journalctl Command 459

    The /etc/systemd/journald.conf file 460

    Summary 461

    Key Terms 461

    Review Questions 461

    Part VII: Software Management 462

    Chapter 26 Red HatBased Software Management 464

    Red Hat Packages 464

    How to Obtain Packages 465

    The /var/lib/rpm Directory 465

    Using the rpm Command 466

    Listing rpm Information 466

    Installing Packages with rpm 472

    Removing Packages with rpm 474

    rpm2cpio 475

    The yum Command 475

    Repositories 475

    Using the yum Command 477

    Additional Tools 484

    Summary 484

    Key Terms 485

    Review Questions 485

    Chapter 27 Debian-Based Software Management 486

    Managing Packages with dpkg 486

    Listing Package Information with dpkg 486

    Installing Software with dpkg 489

    Reconfiguring Software with dpkg 490

    Extracting Files from a Debian Package 490

    Removing Packages with the dpkg Command 491

    Managing Packages with APT 492

    APT Repositories 492

    Creating a Source Repository 494

    Listing Package Information with APT Commands 494

    Installing Packages with APT Commands 496

    Removing Packages with APT Commands 499

    Additional APT Features 500

    Summary 500

    Key Terms 500

    Review Questions 500

    Chapter 28 System Booting 502

    Phases of the Boot Process 502

    The BIOS/UEFI Phase 502

    The Bootloader Phase 503

    The Kernel Phase 503

    The Post-Kernel Phase 504

    GRUB 504

    Legacy GRUB Configuration 504

    GRUB 2 Configuration 512

    Kernel Components 517

    Kernel Documentation 517

    Tweaking the Kernel 517

    Kernel Images 518

    Kernel Modules 519

    The /proc/sys Filesystem 526

    The init Phase 528

    Configuring Systemd 528

    Summary 531

    Key Terms 531

    Review Questions 532

    Chapter 29 Develop a Software Management Security Policy 534

    Ensuring Software Security 534

    Keep Packages Up to Date 534

    Consider Removing Unnecessary Packages 535

    Ensure You Install from Trusted Sources 536

    CVE 537

    Distribution-Specific Security Alerts 538

    xinetd 539

    Summary 540

    Key Terms 540

    Review Questions 541

    Part VIII: Security