
Red Hat Enterprise Linux 8 Essentials
Red Hat Enterprise Linux 8 is one of the most secure and dependable operating systems available. For this reason, the ambitious system or network engineer will find a working knowledge of Red Hat Enterprise 8 to be an invaluable advantage in their respective fields. This book, now updated for RHEL 8.1, begins with a history of Red Enterprise Linux and its installation. You will be virtually perform remote system administration tasks with cockpit web interface and write shell scripts to maintain server-based systems without desktop installation. Then, you will set up a firewall system using a secure shell and enable remote access to Gnome desktop environment with virtual network computing (VNC). You'll share files between the Red Hat Enterprise Linux 8 (RHEL 8) and Windows System using Samba client and NFS. You will also run multiple guest operating systems using virtualization and Linux containers, and host websites using RHEL 8 by installing an Apache web server. Finally, you will create logical disks using logical volume management and implement swap space to maintain the performance of a RHEL 8 system. By the end of this book, you will be armed with the skills and knowledge to install the RHEL 8 operating system and use it expertly.
- 1. Introduction
- 1.1 Superuser Conventions
- 1.2 Feedback
- 1.3 Errata
- 2. A Brief History of Red Hat Linux
- 2.1 What exactly is Linux?
- 2.2 UNIX Origins
- 2.3 Who Created Linux?
- 2.4 The Early Days of Red Hat
- 2.5 Red Hat Support
- 2.6 Open Source
- 2.7 The Fedora Project
- 2.8 CentOS - The Free Alternative
- 2.9 Summary
- 3. Installing RHEL 8 on a Clean Disk Drive
- 3.1 Obtaining the Red Hat Enterprise Linux Installation Media
- 3.2 Writing the ISO Installation Image to a USB Drive
- 3.2.1 Linux
- 3.2.2 macOS
- 3.2.3 Windows
- 3.3 Installing Red Hat Enterprise Linux 8
- 3.4 Partitioning a Disk for RHEL 8
- 3.5 The Physical Installation
- 3.6 Final Configuration Steps
- 3.7 Installing Updates
- 3.8 Displaying Boot Messages
- 3.9 Summary
- 4. Dual Booting RHEL 8 with Windows
- 4.1 Partition Resizing
- 4.2 Editing the RHEL 8 Boot Menu
- 4.3 Changing the Default Boot Option
- 4.4 Accessing the Windows Partition from RHEL 8
- 4.5 Summary
- 5. Allocating Windows Disk Partitions to RHEL 8
- 5.1 Unmounting the Windows Partition
- 5.2 Deleting the Windows Partitions from the Disk
- 5.3 Formatting the Unallocated Disk Partition
- 5.4 Mounting the New Partition
- 5.5 Editing the Boot Menu
- 5.6 Summary
- 6. A Guided Tour of the GNOME 3 Desktop
- 6.1 Installing the GNOME Desktop
- 6.2 An Overview of the GNOME 3 Desktop
- 6.3 Launching Activities
- 6.4 Managing Windows
- 6.5 Using Workspaces
- 6.6 Calendar and Notifications
- 6.7 Desktop Settings
- 6.8 Summary
- 7. An Overview of the RHEL 8 Cockpit Web Interface
- 7.1 An Overview of Cockpit
- 7.2 Installing and Enabling Cockpit
- 7.3 Accessing Cockpit
- 7.4 System
- 7.5 Logs
- 7.6 Storage
- 7.7 Networking
- 7.8 Podman Containers
- 7.9 Virtual Machines
- 7.10 Accounts
- 7.11 Services
- 7.12 Applications
- 7.13 Diagnostic Reports
- 7.14 Kernel Dump
- 7.15 SELinux
- 7.16 Software Updates
- 7.17 Subscriptions
- 7.18 Terminal
- 7.19 Connecting to Multiple Servers
- 7.20 Enabling Stored Metrics
- 7.21 Summary
- 8. Using the Bash Shell on RHEL 8
- 8.1 What is a Shell?
- 8.2 Gaining Access to the Shell
- 8.3 Entering Commands at the Prompt
- 8.4 Getting Information about a Command
- 8.5 Bash Command-line Editing
- 8.6 Working with the Shell History
- 8.7 Filename Shorthand
- 8.8 Filename and Path Completion
- 8.9 Input and Output Redirection
- 8.10 Working with Pipes in the Bash Shell
- 8.11 Configuring Aliases
- 8.12 Environment Variables
- 8.13 Writing Shell Scripts
- 8.14 Summary
- 9. Managing RHEL 8 Users and Groups
- 9.1 User Management from the Command-line
- 9.2 User Management with Cockpit
- 9.3 Summary
- 10. Understanding RHEL 8 Software Installation and Management
- 10.1 Repositories
- 10.2 The BaseOS Repository
- 10.3 The AppStream Repository
- 10.4 Summary
- 11. Configuring RHEL 8 systemd Units
- 11.1 Understanding RHEL 8 systemd Targets
- 11.2 Understanding RHEL 8 systemd Services
- 11.3 RHEL 8 systemd Target Descriptions
- 11.4 Identifying and Configuring the Default Target
- 11.5 Understanding systemd Units and Unit Types
- 11.6 Dynamically Changing the Current Target
- 11.7 Enabling, Disabling and Masking systemd Units
- 11.8 Working with systemd Units in Cockpit
- 11.9 Summary
- 12. RHEL 8 Network Management
- 12.1 An Introduction to NetworkManager
- 12.2 Installing and Enabling NetworkManager
- 12.3 Basic nmcli Commands
- 12.4 Working with Connection Profiles
- 12.5 Interactive Editing
- 12.6 Configuring NetworkManager Permissions
- 12.7 Summary
- 13. Basic RHEL 8 Firewall Configuration with firewalld
- 13.1 An Introduction to firewalld
- 13.1.1 Zones
- 13.1.2 Interfaces
- 13.1.3 Services
- 13.1.4 Ports
- 13.2 Checking firewalld Status
- 13.3 Configuring Firewall Rules with firewall-cmd
- 13.3.1 Identifying and Changing the Default Zone
- 13.3.2 Displaying Zone Information
- 13.3.3 Adding and Removing Zone Services
- 13.3.4 Working with Port-based Rules
- 13.3.5 Creating a New Zone
- 13.3.6 Changing Zone/Interface Assignments
- 13.3.7 Masquerading
- 13.3.8 Adding ICMP Rules
- 13.3.9 Implementing Port Forwarding
- 13.4 Managing firewalld from the Cockpit Interface
- 13.5 Managing firewalld using firewall-config
- 13.6 Summary
- 13.1 An Introduction to firewalld
- 14. Configuring SSH Key-based Authentication on RHEL 8
- 14.1 An Overview of Secure Shell (SSH)
- 14.2 SSH Key-based Authentication
- 14.3 Setting Up Key-based Authentication
- 14.4 SSH Key-based Authentication from Linux and macOS Clients
- 14.5 Managing Multiple Keys
- 14.6 SSH Key-based Authentication from Windows 10 Clients
- 14.7 SSH Key-based Authentication using PuTTY
- 14.8 Generating a Private Key with PuTTYgen
- 14.9 Installing the Public Key for a Google Cloud Instance
- 14.10 Summary
- 15. RHEL 8 Remote Desktop Access with VNC
- 15.1 Secure and Insecure Remote Desktop Access
- 15.2 Installing the GNOME Desktop Environment
- 15.3 Installing VNC on RHEL 8
- 15.4 Configuring the VNC Server
- 15.5 Connecting to a VNC Server
- 15.6 Establishing a Secure Remote Desktop Session
- 15.7 Establishing a Secure Tunnel on Windows using PuTTY
- 15.8 Shutting Down a Desktop Session
- 15.9 Troubleshooting a VNC Connection
- 15.10 Summary
- 16. Displaying RHEL 8 Applications Remotely (X11 Forwarding)
- 16.1 Requirements for Remotely Displaying RHEL 8 Applications
- 16.2 Remotely Displaying a RHEL 8 Application
- 16.3 Trusted X11 Forwarding
- 16.4 Compressed X11 Forwarding
- 16.5 Displaying Remote RHEL 8 Apps on Windows
- 16.6 Summary
- 17. Using NFS to Share RHEL 8 Files with Remote Systems
- 17.1 Ensuring NFS Services are running on RHEL 8
- 17.2 Configuring the RHEL 8 Firewall to Allow NFS Traffic
- 17.3 Specifying the Folders to be Shared
- 17.4 Accessing Shared RHEL 8 Folders
- 17.5 Mounting an NFS Filesystem on System Startup
- 17.6 Unmounting an NFS Mount Point
- 17.7 Accessing NFS Filesystems in Cockpit
- 17.8 Summary
- 18. Sharing Files between RHEL 8 and Windows Systems with Samba
- 18.1 Samba and Samba Client
- 18.2 Installing Samba on a RHEL 8 System
- 18.3 Configuring the RHEL 8 Firewall to Enable Samba
- 18.4 Configuring the smb.conf File
- 18.4.1 Configuring the [global] Section
- 18.4.2 Configuring a Shared Resource
- 18.4.3 Removing Unnecessary Shares
- 18.5 Configuring SELinux for Samba
- 18.6 Creating a Samba User
- 18.7 Testing the smb.conf File
- 18.8 Starting the Samba and NetBIOS Name Services
- 18.9 Accessing Samba Shares
- 18.10 Accessing Windows Shares from RHEL 8
- 18.11 Summary
- 19. An Overview of Virtualization Techniques
- 19.1 Guest Operating System Virtualization
- 19.2 Hypervisor Virtualization
- 19.2.1 Paravirtualization
- 19.2.2 Full Virtualization
- 19.2.3 Hardware Virtualization
- 19.3 Virtual Machine Networking
- 19.4 Summary
- 20. Installing KVM Virtualization on RHEL 8
- 20.1 An Overview of KVM
- 20.2 KVM Hardware Requirements
- 20.3 Preparing RHEL 8 for KVM Virtualization
- 20.4 Verifying the KVM Installation
- 20.5 Summary
- 21. Creating KVM Virtual Machines using Cockpit and virt-manager
- 21.1 Installing the Cockpit Virtual Machines Module
- 21.2 Creating a Virtual Machine in Cockpit
- 21.3 Starting the Installation
- 21.4 Working with Storage Volumes and Storage Pools
- 21.5 Creating a Virtual Machine using virt-manager
- 21.6 Starting the Virtual Machine Manager
- 21.7 Configuring the KVM Virtual System
- 21.8 Starting the KVM Virtual Machine
- 21.9 Summary
- 22. Creating KVM Virtual Machines with virt-install and virsh
- 22.1 Running virt-install to build a KVM Guest System
- 22.2 An Example RHEL 8 virt-install Command
- 22.3 Starting and Stopping a Virtual Machine from the Command-Line
- 22.4 Creating a Virtual Machine from a Configuration File
- 22.5 Summary
- 23. Creating a RHEL 8 KVM Networked Bridge Interface
- 23.1 Getting the Current Network Settings
- 23.2 Creating a Network Bridge from the Command-Line
- 23.3 Declaring the KVM Bridged Network
- 23.4 Using a Bridge Network in a Virtual Machine
- 23.5 Creating a Bridge Network using nm-connection-editor
- 23.6 Summary
- 24. Managing KVM using the virsh Command-Line Tool
- 24.1 The virsh Shell and Command-Line
- 24.2 Listing Guest System Status
- 24.3 Starting a Guest System
- 24.4 Shutting Down a Guest System
- 24.5 Suspending and Resuming a Guest System
- 24.6 Saving and Restoring Guest Systems
- 24.7 Rebooting a Guest System
- 24.8 Configuring the Memory Assigned to a Guest OS
- 24.9 Summary
- 25. An Introduction to Linux Containers
- 25.1 Linux Containers and Kernel Sharing
- 25.2 Container Uses and Advantages
- 25.3 RHEL 8 Container Tools
- 25.4 Container Catalogs, Repositories and Registries
- 25.5 Container Networking
- 25.6 Summary
- 26. Working with Containers on RHEL 8
- 26.1 Installing the Container Tools
- 26.2 Logging in to the Red Hat Container Registry
- 26.3 Pulling a Container Image
- 26.4 Running the Image in a Container
- 26.5 Managing a Container
- 26.6 Saving a Container to an Image
- 26.7 Removing an Image from Local Storage
- 26.8 Removing Containers
- 26.9 Building a Container with Buildah
- 26.10 Building a Container from Scratch
- 26.11 Container Bridge Networking
- 26.12 Managing Containers in Cockpit
- 26.13 Summary
- 27. Setting Up a RHEL 8 Web Server
- 27.1 Requirements for Configuring a RHEL 8 Web Server
- 27.2 Installing the Apache Web Server Packages
- 27.3 Configuring the Firewall
- 27.4 Port Forwarding
- 27.5 Starting the Apache Web Server
- 27.6 Testing the Web Server
- 27.7 Configuring the Apache Web Server for Your Domain
- 27.8 The Basics of a Secure Web Site
- 27.9 Configuring Apache for HTTPS
- 27.10 Obtaining an SSL Certificate
- 27.11 Summary
- 28. Configuring a RHEL 8 Postfix Email Server
- 28.1 The structure of the Email System
- 28.1.1 Mail User Agent
- 28.1.2 Mail Transfer Agent
- 28.1.3 Mail Delivery Agent
- 28.1.4 SMTP
- 28.1.5 SMTP Relay
- 28.2 Configuring a RHEL 8 Email Server
- 28.3 Postfix Pre-Installation Steps
- 28.4 Firewall/Router Configuration
- 28.5 Installing Postfix on RHEL 8
- 28.6 Configuring Postfix
- 28.7 Configuring DNS MX Records
- 28.8 Starting Postfix on a RHEL 8 System
- 28.9 Testing Postfix
- 28.10 Sending Mail via an SMTP Relay Server
- 28.11 Summary
- 28.1 The structure of the Email System
- 29. Adding a New Disk Drive to a RHEL 8 System
- 29.1 Mounted File Systems or Logical Volumes
- 29.2 Finding the New Hard Drive
- 29.3 Creating Linux Partitions
- 29.4 Creating a File System on a RHEL 8 Disk Partition
- 29.5 An Overview of Journaled File Systems
- 29.6 Mounting a File System
- 29.7 Configuring RHEL 8 to Automatically Mount a File System
- 29.8 Adding a Disk Using Cockpit
- 29.9 Summary
- 30. Adding a New Disk to a RHEL 8 Volume Group and Logical Volume
- 30.1 An Overview of Logical Volume Management (LVM)
- 30.1.1 Volume Group (VG)
- 30.1.2 Physical Volume (PV)
- 30.1.3 Logical Volume (LV)
- 30.1.4 Physical Extent (PE)
- 30.1.5 Logical Extent (LE)
- 30.2 Getting Information about Logical Volumes
- 30.3 Adding Additional Space to a Volume Group from the Command-Line
- 30.4 Adding Additional Space to a Volume Group using Cockpit
- 30.5 Summary
- 30.1 An Overview of Logical Volume Management (LVM)
- 31. Adding and Managing RHEL 8 Swap Space
- 31.1 What is Swap Space?
- 31.2 Recommended Swap Space for RHEL 8
- 31.3 Identifying Current Swap Space Usage
- 31.4 Adding a Swap File to a RHEL 8 System
- 31.5 Adding Swap as a Partition
- 31.6 Adding Space to a RHEL 8 LVM Swap Volume
- 31.7 Adding Swap Space to the Volume Group
- 31.8 Summary
- Index
- Tytuły: Red Hat Enterprise Linux 8 Essentials
- Autor: Neil Smyth
- Tytuł oryginału: Red Hat Enterprise Linux 8 Essentials
- ISBN Ebooka: 9781951442040, 9781951442040
- Data wydania: 2019-06-13
- Identyfikator pozycji: e_2t7t
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