Rhcsa & Rhce Red Hat Enterprise Linux 7 · Training and Exam Preparation Guide Ex200 and Ex300 (9781483553009) by Ghori, Asghar -- Read -- Imperial Library of Trantor

Index

Front Cover Title Page Copyright Preface Acknowledgments About the Author Conventions Used in this Book About the RHCSA (EX200) and RHCE (EX300) Exams About this Book Table of Contents RHCSA Section

01. Installing RHEL7 on Physical Computer Using Local DVD

Overview of Linux

Linux Distributions from Red Hat

Obtaining, Planning, and Installing RHEL7

Downloading RHEL7 and Preparing Boot Media Installation Media Options Hardware Requirements Planning the Installation Virtual Console Screens Installation Logs LAB Setup for Practicing RHCSA & RHCE Exam Objectives

Exercise 1-1: Install RHEL7 Server Using DVD

Initiating Installation Configuring Date & Time Adding Support for Keyboards and Languages Choosing Installation Source Selecting Software to be Installed Configuring Installation Destination Configuring Network & Hostname Beginning Installation Setting root Password and Creating a User Account Finishing Installation Performing Post-Installation Tasks

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 1-1: Perform a Default Local Installation Lab 1-2: Perform a Custom Local Installation

02. Using Basic Linux Tools

Accessing a RHEL System Remotely

Accessing from Another Linux System Accessing from Windows

Common Linux Commands

Understanding the Command Syntax Listing Files and Directories Printing Working Directory Changing Directories Showing the Terminal File Listing Currently Logged-In Users Inspecting System’s Uptime Viewing User Login Name Examining User and Group Information Viewing History of Successful User Login Attempts Viewing History of Failed User Login Attempts Displaying Recent User Logins Viewing System Information Displaying and Setting Hostname Clearing the Screen Displaying and Setting System Date and Time Listing and Modifying System Timezone Displaying Command Path Counting Words, Lines, and Characters Listing PCI, USB, and CPU Device Information

Compression Tools

Using gzip and gunzip Using bzip2 and bunzip2

Archiving Tools

Using tar Using star

The vi (vim) Editor

Modes of Operation Starting vi Inserting text Navigating within vi Deleting Text Undoing and Repeating Searching and Replacing Text Copying, Moving, and Pasting Text Changing Text Saving and Quitting vi

Online Help

Using man man Sections Searching by Keyword Displaying Short Description The info Command Documentation in the /usr/share/doc Directory Red Hat Enterprise Linux 7 Documentation

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 2-1: Navigate Linux Directory Tree Lab 2-2: Verify User and Group Identity Lab 2-3: Check User Login Attempts Lab 2-4: Identify the System and Kernel Lab 2-5: Check and Modify System Date and Time Lab 2-6: Check System Uptime and Count Lines Lab 2-7: Archive, List, and Restore Files Lab 2-8: Practice the vi Editor

03. Working with Files and File Permissions

File System Tree

The Root File System (/) – Disk-Based The Boot File System (/boot) – Disk-Based The Variable File System (/var) – Disk-Based The UNIX System Resources File System (/usr) – Disk-Based The Optional File System (/opt) – Disk-Based The Home File System (/home) – Disk-Based The Devices File System (/dev) – Virtual The Process File System (/proc) – Virtual The System File System (/sys) – Virtual The Temporary File System (/tmp) – Virtual

Absolute and Relative Pathnames

Absolute Path Relative Path

File Types

Regular Files Directory Files Executable Files Symbolic Link Files Device Files

File and Directory Operations

Creating Files and Directories Listing Files and Directories Displaying File Contents Copying Files and Directories Moving and Renaming Files and Directories Removing Files and Directories

File and Directory Control Attributes Finding Files

Using the find Command

Linking Files and Directories

Soft Link Hard Link

File and Directory Permissions

Determining Access Permissions Permission Classes Permission Types Permission Modes Modifying Access Permissions Exercise 3-1: Modify File Permissions Using Symbolic Notation Exercise 3-2: Modify File Permissions Using Octal Notation Default Permissions Calculating Default Permissions

File Ownership and Group Membership

Exercise 3-3: Modify File Ownership and Group Membership

Special Permissions

The setuid Bit on Executable Files The setgid Bit on Executable Files The setgid Bit on Shared Directories Exercise 3-4: Use setgid for Group Collaboration The Sticky Bit on Public Directories

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 3-1: Find Files and Determine File Types Lab 3-2: File and Directory Operations Lab 3-3: Find Files Using Different Criteria Lab 3-4: Manipulate File Permissions Lab 3-5: Configure Group Collaboration

04. Dealing with the Bash Shell, Processes, and Scheduling

Introducing the BASH Shell

Variables Setting and Unsetting Variables, and Viewing their Values Command and Variable Substitution Input, Output, and Error Redirection Command History Command Line Editing Tab Completion Tilde Substitution Regular Expression Metacharacters Quoting Mechanisms

Understanding Processes

Viewing and Monitoring Processes Viewing and Monitoring Processes Graphically Listing a Specific Process Listing Processes by User and Group Ownership Process States Understanding Process Niceness Viewing and Changing Process Niceness Renicing a Running Process Controlling Processes with Signals

Understanding Job Scheduling

Controlling User Access Scheduler Log File Using at Exercise 4-1: Submit, View, List, and Remove an at Job Using crontab Syntax of User Crontab Files Exercise 4-2: Add, List, and Remove a Cron Job

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 4-1: Customize the Shell Prompt Lab 4-2: Redirect the Standard Input, Output, and Error Lab 4-3: Nice and Renice a Process Lab 4-4: Configure a User Crontab File

05. Managing Software Packages

Package Overview

Packages and Packaging Package Naming Package Dependency Package Database

Red Hat Subscription Management Service

Red Hat Customer Portal Subscription Asset Manager Subscription-Manager Registering a System and Attaching Subscription Detaching Subscription and Unregistering the System

Managing Packages with rpm

Querying Packages Installing a Package Upgrading a Package Freshening a Package Overwriting a Package Removing a Package Extracting Files from an Installable Package Validating Package Integrity and Credibility Viewing GPG Keys Verifying Package Attributes Exercise 5-1: Perform Package Management Tasks Using rpm

Managing Packages with yum

Yum Configuration File Yum Repository The yum Command Viewing Enabled Repositories Exercise 5-2: Create a Local Yum Repository Exercise 5-3: Create a DVD Yum Repository Listing Packages and Package Groups Installing and Updating Packages and Package Groups Displaying Package and Package Group Header Information Searching Packages Removing Packages and Package Groups Checking for Package Updates Downloading Packages Exercise 5-4: Perform Package Management Tasks Using yum Viewing yum Transaction History

Managing Packages with Graphical Toolset

Adding and Removing Packages Viewing and Updating Packages

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 5-1: Set up a Third Party Yum Repository Lab 5-2: Configure a Local Yum Repository Lab 5-3: Install Package Groups

06. Configuring Server Virtualization and Network Installing RHEL7

Server Virtualization Technology

Virtualization Benefits Verifying Host Virtualization Support Virtualization Packages Virtual Network Switch and Virtual Network Interface Storage Pool and Storage Volume

Virtualization Management Tools

The Virtual Machine Manager (virt-manager) The virsh Command The virt-install Command

Managing Hypervisor

Exercise 6-1: Create a NAT Virtual Network Using virt-manager Exercise 6-2: Define a NAT Virtual Network Using virsh Exercise 6-3: Create a Storage Pool and Volume Using virt-manager Exercise 6-4: Create a Storage Pool and Volume Using virsh

Configuring FTP Installation Server

Exercise 6-5: Configure an FTP Installation Server Exercise 6-6: Replace DVD Yum Repository with FTP Yum Repository Exercise 6-7: Set Up Bi-directional Communication Between Host and Virtual Machines

Network Installing RHEL Using virt-manager

Exercise 6-8: Network Install RHEL7 Using virt-manager

Kickstart Installation Method

Creating a Kickstart Configuration File Exercise 6-9: Network Install RHEL7 Using virt-install with Kickstart Configuration

The wget Utility Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 6-1: Create a Virtual Network Lab 6-2: Create a Virtual Storage Pool Lab 6-3: Perform a Network Installation of RHEL7 Lab 6-4: Perform a Kickstart Installation of RHEL7 Lab 6-5: Add Virtual Disks to Virtual Machines

07. Booting RHEL7, Updating Kernel, and Logging Messages

Linux Boot Process

The Firmware Phase The GRUB Phase The Kernel Phase The Initialization Phase

Managing GRUB

Understanding the GRUB Menu The /etc/default/grub File The /boot/grub2/grub.cfg File Booting into Specific Targets Exercise 7-1: Resetting the Root User Password Modifying the Default Kernel to Boot

The Linux Kernel

Determining Kernel Version Understanding Kernel Directory Structure

Managing the Kernel

Installing and Updating the Kernel Exercise 7-2: Install a New Kernel Listing Loaded Modules Displaying Module Information Loading and Unloading Modules Installing New Modules

init and Upstart Overview of systemd

Units Targets Control Groups

Managing Units and Control Groups

The systemctl Command Managing Units Managing Service Units Managing Target Units Viewing System Boot Performance Statistics Managing Control Groups

System Logging

The System Log Configuration File Maintaining and Managing Log Files The Boot Log File The System Log File Understanding the Journal Viewing the Journal Storing Journal Information Persistently

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 7-1: Modify the Default Boot Target Lab 7-2: Install a New Kernel

08. Managing Users and Groups

Understanding Local User Authentication Files

The passwd File The shadow File The group File The gshadow File Maintaining Integrity of Authentication Files Preventing Corruption in Authentication Files Activating and Deactivating Shadow Password Mechanism

Managing User Accounts and Password Aging with Commands

The useradd, usermod, and userdel Commands The chage Command The passwd Command The useradd and login.defs Files Exercise 8-1: Create a User Account with Default Values Exercise 8-2: Create a User Account with Custom Values Exercise 8-3: Create a User Account with No Login Access Exercise 8-4: Set up Password Aging on User Accounts Exercise 8-5: Modify and Delete a User Account Switching Users Doing as Superuser

Managing Group Accounts with Commands

The groupadd, groupmod, and groupdel Commands The gpasswd Command Exercise 8-6: Create, Modify, and Delete Group Accounts Exercise 8-7: Manage Groups with gpasswd Command

Managing Users, Groups, and Password Aging with the User Manager Tool Shell Startup Files

System-wide Shell Startup Files Per-user Shell Startup Files

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 8-1: Create and Modify a User Account Lab 8-2: Modify a Group Account

09. Partitioning and Managing Disk Storage

MBR vs GPT Adding and Verifying Virtual Block Storage

Adding 3x2GB Virtual Block Disks Using virt-manager Adding 1x2GB Virtual Block Disk Using Command Line Verifying the New Storage

Managing Storage with parted

Exercise 9-1: Create an MBR Partition Table and a Partition Using parted Exercise 9-2: Delete an MBR Partition Using parted

Managing Storage with gdisk

Exercise 9-3: Create a GPT Partition Table and a Partition Using gdisk Exercise 9-4: Delete a GPT Partition Using gdisk Partitioning with the Graphical Disk Utility

Understanding Logical Volume Manager

Physical Volume Volume Group Physical Extent Logical Volume Logical Extent Thin Provisioning

Managing Storage with Logical Volume Manager

LVM Commands Exercise 9-5: Create a Physical Volume and a Volume Group Exercise 9-6: Create a Logical Volume Exercise 9-7: Extend a Volume Group and a Logical Volume Exercise 9-8: Rename, Reduce, and Remove a Logical Volume Exercise 9-9: Reduce and Remove a Volume Group Exercise 9-10: Uninitialize a Physical Volume

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 9-1: Manage Partitioning with parted Lab 9-2: Manage Partitioning with gdisk Lab 9-3: Manage Storage with LVM

10. Constructing and Using File Systems and Swap

Understanding File Systems

Types of File System Extended File Systems XFS File System VFAT File System

Managing File Systems

File System Administration Commands Mounting and Unmounting a File System Determining the UUID of a File System Labeling a File System Automatically Mounting a File System at Reboots Reporting File System Usage Exercise 10-1: Create and Mount Extended File Systems Exercise 10-2: Resize an Extended File System Exercise 10-3: Create, Mount, and Extend an XFS File System Exercise 10-4: Create and Mount a VFAT File System Exercise 10-5: Create, Mount, Unmount, and Remove File Systems Checking and Repairing Extended File Systems Exercise 10-6: Repair a Damaged Extended File System Checking and Repairing an XFS File System

Mounting and Unmounting Remote File Systems

Exercise 10-7: Mount and Unmount an NFS File System Exercise 10-8: Mount and Unmount a CIFS File System

AutoFS

Benefits of Using AutoFS How AutoFS Works AutoFS Configuration File AutoFS Maps Exercise 10-9: Access an NFS Share with a Direct Map Exercise 10-10: Access an NFS Share with an Indirect Map Automounting User Home Directories Using Wildcard Substitution

Understanding and Managing Swap

Determining Swap Usage Exercise 10-11: Create and Activate Swap Spaces Exercise 10-12: Deactivate and Remove Swap Spaces

Access Control Lists (ACLs)

ACL Management Commands The Role of the mask Value Exercise 10-13: Determine, Set, and Delete Access ACLs Default ACLs Exercise 10-14: Set, Confirm, and Delete Default ACLs

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 10-1: Create and Mount an Extended File System Lab 10-2: Automount a Network File System Lab 10-3: Create and Enable Swap Lab 10-4: Apply ACL Settings

11. Controlling Access through Firewall and SELinux

Understanding and Managing Firewall

iptables with and without firewalld Understanding the iptables Configuration File Controlling iptables and firewalld Services The iptables Command Exercise 11-1: Add and Activate iptables Rules Exercise 11-2: Add and Remove iptables Rules Understanding firewalld Configuration Files The firewall-cmd Command Exercise 11-3: Add and Manage Firewall Rules Exercise 11-4: Modify and Remove Firewall Rules Overview of the Firewall Configuration Tool

Overview of Security Enhanced Linux

Key Terms SELinux Contexts for Users SELinux Contexts for Processes SELinux Contexts for Files SELinux Contexts for Ports Domain Transitioning Copying, Moving, and Archiving Files with SELinux Contexts SELinux Booleans

Managing SELinux

Management Commands Controlling Activation Mode Querying Status Exercise 11-5: Modify SELinux Contexts for Users Exercise 11-6: Modify SELinux Contexts for Files Exercise 11-7: Add a Non-Standard Port to SELinux Policy Exercise 11-8: Copy Files with and without SELinux Context Overview of the SELinux Administration Tool Viewing and Analyzing SELinux Alerts

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 11-1: Add Firewall Rules Lab 11-2: Disable and Enable the SELinux Operating Mode

12. Administering Network Interfaces and Network Clients

Basic Networking

Hostname IPv4 Address Network Classes Subnetting and Subnet Mask Protocol TCP and UDP Protocols Ethernet Address and Address Resolution Protocol

Network Interfaces

Consistent Interface Naming Understanding Interface Configuration File Understanding the Hosts Table Interface Administration Commands What is NetworkManager? Exercise 12-1: Present, Configure, and Activate a Network Interface Manually The nmcli Command Exercise 12-2: Present, Configure, and Activate a Network Interface Using NetworkManager CLI Testing Network Connectivity with ping Overview of Graphical Network Administration Tools

The NTP Client

Activate the NTP Client Overview of the System-Config-Date GUI

The OpenLDAP Client

Benefits of Using OpenLDAP OpenLDAP Terminology OpenLDAP Roles OpenLDAP Client Packages OpenLDAP Client Configuration Files The authconfig Command Exercise 12-3: Configure LDAP Client to Obtain User and Group Information Overview of Graphical Authentication Configuration Tool

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 12-1: Assign a New IP to the System

13. Securing Access with SSH and TCP Wrappers

The OpenSSH Service

OpenSSH Versions and Algorithms Encryption Techniques Authentication Methods OpenSSH Packages Commands and Daemon System-Wide Server and Client Configuration Files Per-User Client Files Exercise 13-1: Configure Private/Public Key-Based Authentication Executing a Command Remotely Using ssh Copying Files Using scp Transferring Files Using sftp Accessing OpenSSH Server from Windows

TCP Wrappers Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 13-1: Establish Key-Based Authentication Lab 13-2: Configure TCP Wrappers to Secure Services

RHCE Section

14. Writing Shell Scripts

Shell Scripts

Displaying System Information Executing a Script Debugging a Shell Script Using Local Variables Using Pre-Defined Environment Variables Parsing Command Output Understanding and Using Command Line Arguments Shifting Command Line Arguments Writing an Interactive Script

Logical Statements

Exit Codes Test Conditions The if-then-fi Statement The if-then-else-fi Statement The if-then-elif-fi Statement

Looping Statements

Test Conditions The for-do-done Loop The while-do-done Loop

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 14-1: Write a Script to Create Logical Volumes Lab 14-2: Write a Script to Create File Systems

15. Configuring Bonding, Teaming, IPv6, and Routing

Link Aggregation

Interface Bonding Exercise 15-1: Configure Interface Bonding by Editing Files Using the nmcli Command to Configure Bonding and Teaming Exercise 15-2: Configure Interface Bonding with NetworkManager CLI Interface Teaming Exercise 15-3: Configure Interface Teaming by Editing Files Exercise 15-4: Configure Interface Teaming with NetworkManager CLI Graphical Network Administration Tools for Configuring Bonding and Teaming

IPv6

Managing IPv6 Exercise 15-5: Configure and Test IPv6 Addresses

Routing

Routing Table Managing Routes Exercise 15-6: Add Static Routes Manually

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 15-1: Set Up Teaming between Two Systems Using NetworkManager TUI Lab 15-2: Set Up Bonding between Two Systems Using NetworkManager TUI Lab 15-3: Configure Static Routes

16. Synchronizing Time with NTP

Understanding Network Time Protocol

Time Source NTP Roles Stratum Levels

Managing Network Time Protocol

NTP Packages and Utilities NTP Configuration File Exercise 16-1: Use Pre-Defined NTP Polling Client Exercise 16-2: Configure NTP Server and Polling Client Exercise 16-3: Configure an NTP Peer Exercise 16-4: Configure a Broadcast Server and Client Overview of System-Config-Date Tool Updating System Clock Manually Querying NTP Servers

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 16-1: Configure the Network Time Protocol Service

17. Working with Firewalld and Kerberos

Understanding Firewalld

Network Zones Services Ports Direct Interface and Rich Language Network Address Translation and IP Masquerading Port Forwarding

Managing Firewalld

firewalld Command Options for Zone Management Exercise 17-1: View and Manage Zones firewalld Command Options for Service Management Exercise 17-2: View and Manage Services firewalld Command Options for Port Management Exercise 17-3: View and Manage Ports firewalld Command Options for Using Rich Language Rules Exercise 17-4: Manage Rules Using Rich Language firewalld Command Options for Masquerade Management Exercise 17-5: Add and Remove Masquerading firewalld Command Options for Port Forwarding Exercise 17-6: Add and Remove Port Forwarding

Understanding and Managing Kerberos

Terminology How Kerberos Authenticates Clients Kerberos Packages and Utilities Exercise 17-7: Configure a Client to Authenticate Using Kerberos Overview of Authentication Configuration Tool for Kerberos Client Setup

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 17-1: Create a Persistent firewalld Service Lab 17-2: Create a Persistent Rich Rule Lab 17-3: Configure a Kerberos Client

18. Tuning Kernel Parameters, Reporting System Usage, and Logging Remotely

Understanding and Tuning Kernel Parameters

Run-Time Parameters Exercise 18-1: Tune Run-Time Kernel Parameters Boot-Time Parameters Exercise 18-2: Tune Boot-Time Kernel Parameters

Generating System Usage Reports

The sysstat Toolset The dstat Tool

Logging System Messages Remotely

Exercise 18-3: Configure a System as a Loghost Exercise 18-4: Configure a System as a Loghost Client

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 18-1: Modify a Run-Time Kernel Parameter Lab 18-2: Modify a Boot-Time Kernel Parameter Lab 18-3: Set Up a Central Loghost System

19. Sharing Block Storage with iSCSI

Understanding the iSCSI Protocol

Terminology iSCSI Software Packages

Managing iSCSI Target Server and Initiator

Understanding the targetcli Command for Target Administration Adding 1x2GB Virtual Disk to Target Server Exercise 19-1: Configure a Disk-Based iSCSI Target LUN Understanding the iscsiadm Command for Initiator Administration The /etc/iscsi/iscsid.conf File The /etc/iscsi/initiatorname.iscsi File Exercise 19-2: Mount the iSCSI Target on Initiator Exercise 19-3: Configure a File-Based iSCSI Target and Mount it on Initiator

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 19-1: Build an iSCSI LUN on an LVM Logical Volume and Mount it on Initiator

20. Sharing File Storage with NFS

Understanding Network File System

Benefits of Using NFS NFS Versions NFS Security NFS Daemons NFS Commands NFS Configuration and Functional Files The /etc/exports File and NFS Server Options

Configuring NFS Server and Client

SELinux Requirements for NFS Operation Exercise 20-1: Export Shares to NFS Client NFS Client Options Exercise 20-2: Mount a Share on NFS Client Exercise 20-3: Export a Share for Group Collaboration on NFS Client Exercise 20-4: Provide Secure Access to NFS Share with Kerberos

Monitoring NFS Activities Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 20-1: Share a Directory with NFS Lab 20-2: Share a Directory for Group Collaboration Lab 20-3: Access NFS Shares via Kerberos

21. Sharing File Storage with Samba

Understanding Samba

Benefits of Using Samba Samba Daemon Samba Commands Samba Configuration and Functional Files Understanding Samba Configuration File Samba Software Packages

Configuring Samba Server and Client

SELinux Requirements for Samba Operation Exercise 21-1: Provide Network Shares to Samba Client Exercise 21-2: Access and Mount a Share on Samba Client Exercise 21-3: Provide a Share for Group Collaboration on Samba Client Exercise 21-4: Provide Secure Access to Samba Share with Kerberos

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 21-1: Share a Directory with Samba Lab 21-2: Share a Directory with Samba for Group Collaboration

22. Hosting Websites with Apache

HTTP and the Apache Web Server

Apache Features Apache Daemon Apache Commands Apache Configuration Files Analysis of the httpd.conf File Apache Log Files Apache Software Packages Access Control

Configuring Apache Web Servers

SELinux Requirements for Apache Operation Exercise 22-1: Configure the Default Apache Web Server Exercise 22-2: Modify the Default Web Server to Use a Different Home Page and Hostname Exercise 22-3: Extend the Web Server to Provide Access to a Private Directory Exercise 22-4: Modify the Web Server to Provide Access to Group-Managed Contents Exercise 22-5: Modify the Web Server to Limit Access to Select Hosts on a Non-Default Port

Understanding and Configuring Apache Virtual Hosts

Virtual Host Configuration File Exercise 22-6: Configure a Simple Virtual Host Exercise 22-7: Configure a More Complex Virtual Host

Understanding and Configuring Apache Web Servers over SSL/TLS

HTTPS/SSL Software Packages The OpenSSL Toolkit The OpenSSL Configuration File and its Analysis OpenSSL Log Files Exercise 22-8: Generate a Key Pair and Self-Signed Certificate Exercise 22-9: Configure a Secure Virtual Host

Overview of CGI and CGI Scripts

Exercise 22-10: Deploy a Basic CGI Script Exercise 22-11: Run a Basic CGI Script from a non-default location

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 22-1: Configure a Web Server with User-Based and Host-Based Security Lab 22-2: Configure a Web Server to Host Two Websites Lab 22-3: Configure a Secure Virtual Host Lab 22-4: Deploy a CGI Script

23. Sending and Receiving Electronic Mail

SMTP and the Email System

Common Terms How the Email System Works

Understanding Postfix

Postfix Daemons Postfix Commands Postfix Configuration Files Postfix Logging

Managing Postfix

SELinux Requirements for Postfix Operation Exercise 23-1: Configure a Central Mail Server Exercise 23-2: Test Central Mail Server from Remote Client Exercise 23-3: Configure Postfix to Forward Local Mail to a Central Mail Server and Reject Incoming Mail Exercise 23-4: Configure Postfix to Receive Local Network Mail and Forward All Mail to a Central Mail Server

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 23-1: Establish a Network Mail Server and Test It Lab 23-2: Establish a Forwarding Mail Server and Test It

24. Configuring DNS

Domain Name System and Name Resolution

What is BIND? DNS Name Space and Domains DNS Root Servers DNS Roles Types of Nameserver Configurations DNS Zones and Zone Files BIND Software Packages and Service Daemon Analysis of the Default Nameserver Configuration File Analysis of the Default Zone Configuration File DNS Message Logging

Configuring BIND Server

SELinux Requirements for BIND Operation Exercise 24-1: Configure a Caching-Only DNS Server

Understanding, Configuring, and Troubleshooting DNS Client

Overview of DNS Client Configuration Files Overview of DNS Lookup Utilities Exercise 24-2: Configure DNS Client and Test Server Configuration Troubleshooting DNS Client Issues

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 24-1: Configure a Caching-Only Nameserver

25. Managing MariaDB

Understanding Databases, DBMS, and MariaDB

What is a Relational Database? Overview of MariaDB MariaDB Software Packages and Service Daemon MariaDB Commands MariaDB Configuration Files Logging MariaDB Messages

Managing MariaDB

SELinux Requirements for MariaDB Operation Exercise 25-1: Install and Configure MariaDB Starting the MariaDB Shell and Understanding its Usage Displaying Connection Status Subcommands for Database and Table Operations Exercise 25-2: Create Database and Table, and Insert Records Exercise 25-3: Perform SQL Queries against a Database Exercise 25-4: Rename Table, and Update and Delete Records Backing Up and Restoring a Database or Table Exercise 25-5: Backup, Drop, Recreate, and Restore a Database

Chapter Summary Chapter Review Questions Answers to Chapter Review Questions DIY Challenge Labs

Lab 25-1: Create a Database and Table, and Add Records Lab 25-2: Update and Delete Records Lab 25-3: Rebuild a Database

Appendix A: Sample RHCSA Exam 1 Appendix B: Sample RHCSA Exam 2 Appendix C: Sample RHCE Exam 1 Appendix D: Sample RHCE Exam 2 Bibliography Glossary Index

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