Linux Cookbook, 2nd Edition

Cover
Copyright
Table of Contents
Preface
	Who Should Read This Book
	Why I Wrote This Book
	Navigating This Book
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Installing Linux
	Booting from Installation Media
	Where to Download Linux
	Best Linux for Newbies
	1.1 Entering your System BIOS/UEFI Setup
		Problem
		Solution
		Discussion
		See Also
	1.2 Downloading a Linux Installation Image
		Problem
		Solution
		Discussion
		See Also
	1.3 Creating a Linux Installation USB Stick with UNetbootin
		Problem
		Solution
		Discussion
		See Also
	1.4 Creating a Linux Installation DVD with K3b
		Problem
		Solution
		Discussion
		See Also
	1.5 Using the wodim Command to Create a Bootable CD/DVD
		Problem
		Solution
		Discussion
		See Also
	1.6 Creating a Linux Installation USB Stick with the dd Command
		Problem
		Solution
		Discussion
		See Also
	1.7 Trying a Simple Ubuntu Installation
		Problem
		Solution
		Discussion
		See Also
	1.8 Customizing Partitioning
		Problem
		Solution
		Discussion
		See Also
	1.9 Preserving Existing Partitions
		Problem
		Solution
		Discussion
		See Also
	1.10 Customizing Package Selection
		Problem
		Solution
		Discussion
		See Also
	1.11 Multibooting Linux Distributions
		Problem
		Solution
		Discussion
		See Also
	1.12 Dual-boot with Microsoft Windows
		Problem
		Solution
		Discussion
		See Also
	1.13 Recovering an OEM Windows 8 or 10 Product Key
		Problem
		Solution
		Discussion
		See Also
	1.14 Mounting Your ISO Image on Linux
		Problem
		Solution
		Discussion
		See Also
Chapter 2. Managing the GRUB Bootloader
	2.1 Rebuilding Your GRUB Configuration File
		Problem
		Solution
		Discussion
		See Also
	2.2 Unhiding a Hidden GRUB Menu
		Problem
		Solution
		Discussion
		See Also
	2.3 Booting to a Different Linux Kernel
		Problem
		Solution
		Discussion
		See Also
	2.4 Understanding GRUB Configuration Files
		Problem
		Solution
		Discussion
		See Also
	2.5 Writing a Minimal GRUB Configuration File
		Problem
		Solution
		Discussion
		See Also
	2.6 Setting a Custom Background for Your GRUB Menu
		Problem
		Solution
		Discussion
		See Also
	2.7 Changing Font Colors in the GRUB Menu
		Problem
		Solution
		Discussion
		See Also
	2.8 Applying a Theme to Your GRUB Menu
		Problem
		Solution
		Discussion
		See Also
	2.9 Rescuing a Nonbooting System from the grub> Prompt
		Problem
		Solution
		Discussion
		See Also
	2.10 Rescuing a Nonbooting System from the grub rescue> Prompt
		Problem
		Solution
		Discussion
		See Also
	2.11 Reinstalling Your GRUB Configuration
		Problem
		Solution
		Discussion
		See Also
Chapter 3. Starting, Stopping, Restarting, and Putting Linux into Sleep Modes
	3.1 Shutting Down with systemctl
		Problem
		Solution
		Discussion
		See Also
	3.2 Shutting Down, Timed Shutdowns, and Rebooting with the shutdown Command
		Problem
		Solution
		Discussion
		See Also
	3.3 Shutting Down and Rebooting with halt, reboot, and poweroff
		Problem
		Solution
		Discussion
		See Also
	3.4 Sending Your System into Sleep Modes with systemctl
		Problem
		Solution
		Discussion
		See Also
	3.5 Rebooting Out of Trouble with Ctrl-Alt-Delete
		Problem
		Solution
		Discussion
		See Also
	3.6 Disabling, Enabling, and Configuring Ctrl-Alt-Delete in the Linux Console
		Problem
		Solution
		Discussion
		See Also
	3.7 Creating Scheduled Shutdowns with cron
		Problem
		Solution
		Discussion
		See Also
	3.8 Scheduling Automated Startups with UEFI Wake-Ups
		Problem
		Solution
		Discussion
		See Also
	3.9 Scheduling Automated Startups with RTC Wake-ups
		Problem
		Solution
		Discussion
		See Also
	3.10 Setting Up Remote Wake-Ups with Wake-on-LAN over Wired Ethernet
		Problem
		Solution
		Discussion
		See Also
	3.11 Setting Up Remote Wake-Ups over WiFi (WoWLAN)
		Problem
		Solution
		Discussion
		See Also
Chapter 4. Managing Services with systemd
	4.1 Learning if Your Linux Uses systemd
		Problem
		Solution
		Discussion
		See Also
	4.2 Understanding PID 1, the Mother of All Processes
		Problem
		Solution
		Discussion
		See Also
	4.3 Listing Services and Their States with systemctl
		Problem
		Solution
		Discussion
		See Also
	4.4 Querying the Status of Selected Services
		Problem
		Solution
		Discussion
		See Also
	4.5 Starting and Stopping Services
		Problem
		Solution
		Discussion
		See Also
	4.6 Enabling and Disabling Services
		Problem
		Solution
		Discussion
		See Also
	4.7 Stopping Troublesome Processes
		Problem
		Solution
		Discussion
		See Also
	4.8 Managing Runlevels with systemd
		Problem
		Solution
		Discussion
		See Also
	4.9 Diagnosing Slow Startups
		Problem
		Solution
		Discussion
		See Also
Chapter 5. Managing Users and Groups
	5.1 Finding a User’s UID and GID
		Problem
		Solution
		Discussion
		See Also
	5.2 Creating a Human User with useradd
		Problem
		Solution
		Discussion
		See Also
	5.3 Creating a System User with useradd
		Problem
		Solution
		Discussion
		See Also
	5.4 Changing the useradd Default Settings
		Problem
		Solution
		Discussion
		See Also
	5.5 Customizing the Documents, Music, Video, Pictures, and Downloads Directories
		Problem
		Solution
		Discussion
		See Also
	5.6 Creating User and System Groups with groupadd
		Problem
		Solution
		Discussion
		See Also
	5.7 Adding Users to Groups with usermod
		Problem
		Solution
		Discussion
		See Also
	5.8 Creating Users with adduser on Ubuntu
		Problem
		Solution
		Discussion
		See Also
	5.9 Creating a System User with adduser on Ubuntu
		Problem
		Solution
		Discussion
		See Also
	5.10 Creating User and System Groups with addgroup
		Problem
		Solution
		Discussion
		See Also
	5.11 Checking Password File Integrity
		Problem
		Solution
		Discussion
		See Also
	5.12 Disabling a User Account
		Problem
		Solution
		Discussion
		See Also
	5.13 Deleting a User with userdel
		Problem
		Solution
		Discussion
		See Also
	5.14 Deleting a User with deluser on Ubuntu
		Problem
		Solution
		Discussion
		See Also
	5.15 Removing a Group with delgroup on Ubuntu
		Problem
		Solution
		Discussion
		See Also
	5.16 Finding and Managing All Files for a User
		Problem
		Solution
		Discussion
		See Also
	5.17 Using su to Be Root
		Problem
		Solution
		Discussion
		See Also
	5.18 Granting Limited Root Powers with sudo
		Problem
		Solution
		Discussion
		See Also
	5.19 Extending the sudo Password Timeout
		Problem
		Solution
		Discussion
		See Also
	5.20 Creating Individual sudoers Configurations
		Problem
		Solution
		Discussion
		See Also
	5.21 Managing the Root User’s Password
		Problem
		Solution
		Discussion
		See Also
	5.22 Changing sudo to Not Ask for the Root Password
		Problem
		Solution
		Discussion
		See Also
Chapter 6. Managing Files and Directories
	6.1 Creating Files and Directories
		Problem
		Solution
		Discussion
		See Also
	6.2 Quickly Creating a Batch of Files for Testing
		Problem
		Solution
		Discussion
		See Also
	6.3 Working with Relative and Absolute Filepaths
		Problem
		Solution
		Discussion
		See Also
	6.4 Deleting Files and Directories
		Problem
		Solution
		Discussion
		See Also
	6.5 Copying, Moving, and Renaming Files and Directories
		Problem
		Solution
		Discussion
		See Also
	6.6 Setting File Permissions with chmod’s Octal Notation
		Problem
		Solution
		Discussion
		See Also
	6.7 Setting Directory Permissions with chmod’s Octal Notation
		Problem
		Solution
		Discussion
		See Also
	6.8 Using the Special Modes for Special Use Cases
		Problem
		Solution
		Discussion
		See Also
	6.9 Removing the Special Modes in Octal Notation
		Problem
		Solution
		See Also
	6.10 Setting File Permissions with chmod’s Symbolic Notation
		Problem
		Solution
		Discussion
		See Also
	6.11 Setting the Special Modes with chmod’s Symbolic Notation
		Problem
		Solution
		Discussion
		See Also
	6.12 Setting Permissions in Batches with chmod
		Problem
		Solution
		Discussion
		See Also
	6.13 Setting File and Directory Ownership with chown
		Problem
		Solution
		Discussion
		See Also
	6.14 Changing Ownership on Batches of Files with chown
		Problem
		Solution
		Discussion
		See Also
	6.15 Setting Default Permissions with umask
		Problem
		Solution
		Discussion
		See Also
	6.16 Creating Shortcuts (Soft and Hard Links) to Files and Directories
		Problem
		Solution
		Discussion
		See Also
	6.17 Hiding Files and Directories
		Problem
		Solution
		Discussion
		See Also
Chapter 7. Backup and Recovery with rsync and cp
	7.1 Selecting Which Files to Back Up
		Problem
		Solution
		Discussion
		See Also
	7.2 Selecting Files to Restore from Backups
		Problem
		Solution
		See Also
	7.3 Using the Simplest Local Backup Method
		Problem
		Solution
		Discussion
		See Also
	7.4 Automating Simple Local Backups
		Problem
		Solution
		Discussion
		See Also
	7.5 Using rsync for Local Backups
		Problem
		Solution
		Discussion
		See Also
	7.6 Making Secure Remote File Transfers with rsync over SSH
		Problem
		Solution
		Discussion
		See Also
	7.7 Automating rsync Transfers with cron and SSH
		Problem
		Solution
		Discussion
		See Also
	7.8 Excluding Files from Backup
		Problem
		Solution
		Discussion
		See Also
	7.9 Including Selected Files to Backup
		Problem
		Solution
		Discussion
		See Also
	7.10 Managing Includes with a Simple Include File
		Problem
		Solution
		Discussion
		See Also
	7.11 Managing Includes and Excludes with an Exclude File
		Problem
		Solution
		Discussion
		See also
	7.12 Limiting rsync’s Bandwidth Use
		Problem
		Solution
		Discussion
		See Also
	7.13 Building an rsyncd Backup Server
		Problem
		Solution
		Discussion
		See Also
	7.14 Limiting Access to rsyncd Modules
		Problem
		Solution
		Discussion
		See Also
	7.15 Creating a Message of the Day for rsyncd
		Problem
		Solution
		Discussion
		See Also
Chapter 8. Managing Disk Partitioning with parted
	Overview
		Partitioning Schemes
		Partition Tables: GPT and MBR
		BIOS and UEFI
		Blocks and Sectors
	8.1 Unmounting Your Partitions Before Using parted
		Problem
		Solution
		Discussion
		See Also
	8.2 Choosing the Command Mode for parted
		Problem
		Solution
		Discussion
		See Also
	8.3 Viewing Your Existing Disks and Partitions
		Problem
		Solution
		Discussion
		See Also
	8.4 Creating GPT Partitions on a Nonbooting Disk
		Problem
		Solution
		Discussion
		See Also
	8.5 Creating Partitions for Installing Linux
		Problem
		Solution
		Discussion
		See Also
	8.6 Removing Partitions
		Problem
		Solution
		Discussion
		See Also
	8.7 Recovering a Deleted Partition
		Problem
		Solution
		Discussion
		See Also
	8.8 Increasing Partition Size
		Problem
		Solution
		Discussion
		See Also
	8.9 Shrinking a Partition
		Problem
		Solution
		Discussion
		See Also
Chapter 9. Managing Partitions and Filesystems with GParted
	9.1 Viewing Partitions, Filesystems, and Free Space
		Problem
		Solution
		Discussion
		See Also
	9.2 Creating a New Partition Table
		Problem
		Solution
		Discussion
		See Also
	9.3 Deleting a Partition
		Problem
		Solution
		Discussion
		See Also
	9.4 Creating a New Partition
		Problem
		Solution
		Discussion
		See Also
	9.5 Deleting a Filesystem Without Deleting the Partition
		Problem
		Solution
		See Also
	9.6 Recovering a Deleted Partition
		Problem
		Solution
		Discussion
		See Also
	9.7 Resizing Partitions
		Problem
		Solution
		Discussion
		See Also
	9.8 Moving a Partition
		Problem
		Solution
		Discussion
		See Also
	9.9 Copying a Partition
		Problem
		Solution
		Discussion
		See Also
	9.10 Managing Filesystems with GParted
		Problem
		Solution
		Discussion
Chapter 10. Getting Detailed Information About Your Computer Hardware
	10.1 Collecting Hardware Information with lshw
		Problem
		Solution
		Discussion
		See Also
	10.2 Filtering lshw Output
		Problem
		Solution
		Discussion
		See Also
	10.3 Detecting Hardware, Including Displays and RAID Devices, with hwinfo
		Problem
		Solution
		Discussion
		See Also
	10.4 Detecting PCI Hardware with lspci
		Problem
		Solution
		Discussion
		See Also
	10.5 Understanding lspci Output
		Problem
		Solution
		Discussion
		See Also
	10.6 Filtering lspci Output
		Problem
		Solution
		Discussion
		See Also
	10.7 Using lspci to Identify Kernel Modules
		Problem
		Solution
		Discussion
		See Also
	10.8 Using lsusb to List USB Devices
		Problem
		Solution
		Discussion
		See Also
	10.9 Listing Partitions and Hard Disks with lsblk
		Problem
		Solution
		Discussion
	10.10 Getting CPU Information
		Problem
		Solution
		Discussion
		See Also
	10.11 Identifying Your Hardware Architecture
		Problem
		Solution
		Discussion
		See Also
Chapter 11. Creating and Managing Filesystems
	Filesystem Overview
	11.1 Listing Supported Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.2 Identifying Your Existing Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.3 Resizing Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.4 Deleting Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.5 Using a New Filesystem
		Problem
		Solution
		Discussion
		See Also
	11.6 Creating Automatic Filesystem Mounts
		Problem
		Solution
		Discussion
		See Also
	11.7 Creating Ext4 Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.8 Configuring the Ext4 Journal Mode
		Problem
		Solution
		Discussion
		See Also
	11.9 Finding Which Journal Your Ext4 Filesystem Is Attached To
		Problem
		Solution
		Discussion
		See Also
	11.10 Improving Performance with an External Journal for Ext4
		Problem
		Solution
		Discussion
		See Also
	11.11 Freeing Space from Reserved Blocks on Ext4 Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.12 Creating a New XFS Filesystem
		Problem
		Solution
		Discussion
		See Also
	11.13 Resizing an XFS Filesystem
		Problem
		Solution
		Discussion
		See Also
	11.14 Creating an exFAT Filesystem
		Problem
		Solution
		Discussion
		See Also
	11.15 Creating FAT16 and FAT32 Filesystems
		Problem
		Solution
		Discussion
		See Also
	11.16 Creating a Btrfs Filesystem
		Problem
		Solution
		Discussion
		See Also
Chapter 12. Secure Remote Access with OpenSSH
	12.1 Installing OpenSSH Server
		Problem
		Solution
		Discussion
		See Also
	12.2 Generating New Host Keys
		Problem
		Solution
		Discussion
		See Also
	12.3 Configuring Your OpenSSH Server
		Problem
		Solution
		Discussion
		See Also
	12.4 Checking Configuration Syntax
		Problem
		Solution
		Discussion
		See Also
	12.5 Setting Up Password Authentication
		Problem
		Solution
		Discussion
		See Also
	12.6 Retrieving a Key Fingerprint
		Problem
		Solution
		Discussion
		See Also
	12.7 Using Public Key Authentication
		Problem
		Solution
		Discussion
		See Also
	12.8 Managing Multiple Public Keys
		Problem
		Solution
		Discussion
		See Also
	12.9 Changing a Passphrase
		Problem
		Solution
		Discussion
		See Also
	12.10 Automatic Passphrase Management with Keychain
		Problem
		Solution
		Discussion
		See Also
	12.11 Using Keychain to Make Passphrases Available to Cron
		Problem
		Solution
		Discussion
		See Also
	12.12 Tunneling an X Session Securely over SSH
		Problem
		Solution
		Discussion
		See Also
	12.13 Opening an SSH Session and Running a Command in One Line
		Problem
		Solution
		Discussion
		See Also
	12.14 Mounting Entire Remote Filesystems with sshfs
		Problem
		Solution
		Discussion
		See Also
	12.15 Customizing the Bash Prompt for SSH
		Problem
		Solution
		Discussion
		See Also
	12.16 Listing Supported Encryption Algorithms
		Problem
		Solution
		Discussion
		See Also
Chapter 13. Secure Remote Access with OpenVPN
	OpenVPN Overview
		Certificate Authority
		SSL Versus TLS
		TUN/TAP
	13.1 Installing OpenVPN, Server and Client
		Problem
		Solution
		Discussion
		See Also
	13.2 Setting Up a Simple Connection Test
		Problem
		Solution
		Discussion
		See Also
	13.3 Setting Up Easy Encryption with Static Keys
		Problem
		Solution
		Discussion
		See Also
	13.4 Installing EasyRSA to Manage Your PKI
		Problem
		Solution
		Discussion
		See Also
	13.5 Creating a PKI
		Problem
		Solution
		Discussion
		See Also
	13.6 Customizing EasyRSA Default Options
		Problem
		Solution
		Discussion
		See Also
	13.7 Creating and Testing Server and Client Configurations
		Problem
		Solution
		Discussion
		See Also
	13.8 Controlling OpenVPN with systemctl
		Problem
		Solution
		Discussion
		See Also
	13.9 Distributing Client Configurations More Easily with .ovpn Files
		Problem
		Solution
		See Also
	13.10 Hardening Your OpenVPN Server
		Problem
		Solution
		Discussion
		See Also
	13.11 Configuring Networking
		Problem
		Solution
		Discussion
		See Also
Chapter 14. Building a Linux Firewall with firewalld
	firewalld Overview
		How Firewalls Work
		Network Ports and Numbering
	14.1 Querying Which Firewall Is Running
		Problem
		Solution
		Discussion
		See Also
	14.2 Installing firewalld
		Problem
		Solution
		Discussion
		See Also
	14.3 Finding Your firewalld Version
		Problem
		Solution
		Discussion
		See Also
	14.4 Configuring iptables or nftables as the firewalld Backend
		Problem
		Solution
		Discussion
		See Also
	14.5 Listing All Zones and All Services Managed by Each Zone
		Problem
		Solution
		Discussion
		See Also
	14.6 Listing and Querying Services
		Problem
		Solution
		Discussion
		See Also
	14.7 Selecting and Setting Zones
		Problem
		Solution
		Discussion
		See Also
	14.8 Changing the Default firewalld Zone
		Problem
		Solution
		Discussion
		See Also
	14.9 Customizing firewalld Zones
		Problem
		Solution
		Discussion
		See Also
	14.10 Creating a New Zone
		Problem
		Solution
		Discussion
		See Also
	14.11 Integrating NetworkManager and firewalld
		Problem
		Solution
		See Also
	14.12 Allowing or Blocking Specific Ports
		Problem
		Solution
		Discussion
		See Also
	14.13 Blocking IP Addresses with Rich Rules
		Problem
		Solution
		Discussion
		See Also
	14.14 Changing a Zone Default Target
		Problem
		Solution
		Discussion
		See Also
Chapter 15. Printing on Linux
	Overview
		Finding Supported Printers and Scanners
		CUPS Printer Drivers
		PPDs Are Doomed
	15.1 Using the CUPS Web Interface
		Problem
		Solution
		Discussion
		See Also
	15.2 Installing a Locally Attached Printer
		Problem
		Solution
		Discussion
		See Also
	15.3 Giving Printers Useful Names
		Problem
		Solution
		Discussion
		See Also
	15.4 Installing a Network Printer
		Problem
		Solution
		Discussion
		See Also
	15.5 Using Driverless Printing
		Problem
		Solution
		Discussion
		See Also
	15.6 Sharing Nonnetworked Printers
		Problem
		Solution
		Discussion
		See Also
	15.7 Correcting the “Forbidden” Error Message
		Problem
		Solution
		Discussion
		See Also
	15.8 Installing Printer Drivers
		Problem
		Solution
		Discussion
		See Also
	15.9 Modifying an Installed Printer
		Problem
		Solution
		Discussion
		See Also
	15.10 Saving Documents by Printing to a PDF File
		Problem
		Solution
		Discussion
		See Also
	15.11 Troubleshooting
		Problem
		Solution
		Discussion
		See Also
Chapter 16. Managing Local Name Services with Dnsmasq and the hosts File
	16.1 Simple Name Resolution with /etc/hosts
		Problem
		Solution
		Discussion
		See Also
	16.2 Using /etc/hosts for Testing and Blocking Annoyances
		Problem
		Solution
		Discussion
		See Also
	16.3 Finding All DNS and DHCP Servers on Your Network
		Problem
		Solution
		Discussion
		See also
	16.4 Installing Dnsmasq
		Problem
		Solution
		Discussion
		See Also
	16.5 Making systemd-resolved and NetworkManager Play Nice with Dnsmasq
		Problem
		Solution
		Discussion
		See Also
	16.6 Configuring Dnsmasq for LAN DNS
		Problem
		Solution
		Discussion
		See Also
	16.7 Configuring firewalld to Allow DNS and DHCP
		Problem
		Solution
		Discussion
		See Also
	16.8 Testing Your Dnsmasq Server from a Client Machine
		Problem
		Solution
		Discussion
		See Also
	16.9 Managing DHCP with Dnsmasq
		Problem
		Solution
		Discussion
		See Also
	16.10 Advertising Important Services over DHCP
		Problem
		Solution
		Discussion
		See Also
	16.11 Creating DHCP Zones for Subnets
		Problem
		Solution
		Discussion
		See Also
	16.12 Assigning Static IP Addresses from DHCP
		Problem
		Solution
		Discussion
		See Also
	16.13 Configuring DHCP Clients for Automatic DNS Entries
		Problem
		Solution
		Discussion
		See Also
	16.14 Managing Dnsmasq Logging
		Problem
		Solution
		Discussion
		See Also
	16.15 Configuring Wildcard Domains
		Problem
		Solution
		Discussion
		See Also
Chapter 17. Keeping Time with ntpd, chrony, and timesyncd
	17.1 Finding Which NTP Client Is on Your Linux System
		Problem
		Solution
		Discussion
		See Also
	17.2 Using timesyncd for Simple Time Synchronization
		Problem
		Solution
		Discussion
		See Also
	17.3 Setting Time Manually with timedatectl
		Problem
		Solution
		Discussion
		See Also
	17.4 Using chrony for Your NTP Client
		Problem
		Solution
		Discussion
		See Also
	17.5 Using chrony as a LAN Time Server
		Problem
		Solution
		Discussion
		See Also
	17.6 Viewing chrony Statistics
		Problem
		Solution
		Discussion
		See Also
	17.7 Using ntpd for Your NTP Client
		Problem
		Solution
		Discussion
		See Also
	17.8 Using ntpd for Your NTP Server
		Problem
		Solution
		Discussion
		See Also
	17.9 Managing Time Zones with timedatectl
		Problem
		Solution
		Discussion
		See Also
	17.10 Managing Time Zones Without timedatectl
		Problem
		Solution
		Discussion
		See Also
Chapter 18. Building an Internet Firewall/Router on Raspberry Pi
	Overview
		Pros and Cons of a Raspberry Pi Firewall/Router
		Hardware Architecture
		Rasberry Pi Banquet of Products
		History and Purpose
	18.1 Starting and Shutting Down Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	18.2 Finding Hardware and How-Tos
		Problem
		Solution
		Discussion
		See Also
	18.3 Cooling the Raspberry Pi
		Problem
		Solution
		See Also
	18.4 Installing Raspberry Pi OS with Imager and dd
		Problem
		Solution
		Discussion
		See Also
	18.5 Installing Raspberry Pi with NOOBS
		Problem
		Solution
		Discussion
		See Also
	18.6 Connecting to a Video Display Without HDMI
		Problem
		Solution
		Discussion
		See Also
	18.7 Booting into Recovery Mode
		Problem
		Solution
		Discussion
		See Also
	18.8 Adding a Second Ethernet Interface
		Problem
		Solution
		Discussion
		See Also
	18.9 Setting Up an Internet Connection Sharing Firewall with firewalld
		Problem
		Solution
		Discussion
		See Also
	18.10 Running Your Raspberry Pi Headless
		Problem
		Solution
		Discussion
		See Also
	18.11 Building a DNS/DHCP Server with Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
Chapter 19. System Rescue and Recovery with SystemRescue
	19.1 Creating Your SystemRescue Bootable Device
		Problem
		Solution
		Discussion
		See Also
	19.2 Getting Started with SystemRescue
		Problem
		Solution
		Discussion
		See Also
	19.3 Understanding SystemRescue’s Two Boot Screens
		Problem
		Solution
		Discussion
		See Also
	19.4 Understanding SystemRescue’s Boot Options
		Problem
		Solution
		Discussion
		See Also
	19.5 Identifying Filesystems
		Problem
		Solution
		Discussion
		See Also
	19.6 Resetting a Linux Root Password
		Problem
		Solution
		Discussion
		See Also
	19.7 Enabling SSH in SystemRescue
		Problem
		Solution
		Discussion
		See Also
	19.8 Copying Files over the Network with scp and sshfs
		Problem
		Solution
		Discussion
		See Also
	19.9 Repairing GRUB from SystemRescue
		Problem
		Solution
		Discussion
		See Also
	19.10 Resetting a Windows Password
		Problem
		Solution
		Discussion
		See Also
	19.11 Rescuing a Failing Hard Disk with GNU ddrescue
		Problem
		Solution
		Discussion
		See Also
	19.12 Managing Partitions and Filesystems from SystemRescue
		Problem
		Solution
		See Also
	19.13 Creating a Data Partition on Your SystemRescue USB Drive
		Problem
		Solution
		Discussion
		See Also
	19.14 Preserving Changes in SystemRescue
		Problem
		Solution
		Discussion
		See Also
Chapter 20. Troubleshooting a Linux PC
	Overview
		Prevention
		Patience
	20.1 Finding Useful Information in Logfiles
		Problem
		Solution
		Discussion
		See Also
	20.2 Configuring journald
		Problem
		Solution
		Discussion
		See Also
	20.3 Building a Logging Server with systemd
		Problem
		Solution
		Discussion
		See Also
	20.4 Monitoring Temperatures, Fans, and Voltages with lm-sensors
		Problem
		Solution
		Discussion
		See Also
	20.5 Adding a Graphical Interface to lm-sensors
		Problem
		Solution
		Discussion
		See Also
	20.6 Monitoring Hard Disk Health with smartmontools
		Problem
		Solution
		Discussion
		See Also
	20.7 Configuring smartmontools to Send Email Reports
		Problem
		Solution
		Discussion
		See Also
	20.8 Diagnosing a Sluggish System with top
		Problem
		Solution
		Discussion
		See Also
	20.9 Viewing Selected Processes in top
		Problem
		Solution
		See Also
	20.10 Escaping from a Frozen Graphical Desktop
		Problem
		Solution
		Discussion
	20.11 Troubleshooting Hardware
		Problem
		Solution
		Discussion
		See Also
Chapter 21. Troubleshooting Networks
	Diagnostic Hardware
	21.1 Testing Connectivity with ping
		Problem
		Solution
		Discussion
		See Also
	21.2 Profiling Your Network with fping and nmap
		Problem
		Solution
		Discussion
		See Also
	21.3 Finding Duplicate IP Addresses with arping
		Problem
		Solution
		Discussion
		See Also
	21.4 Testing HTTP Throughput and Latency with httping
		Problem
		Solution
		Discussion
		See Also
	21.5 Using mtr to Find Troublesome Routers
		Problem
		Solution
		Discussion
		See Also
Appendix A. Software Management Cheatsheets
	Package Management Commands
	Managing Software on Ubuntu
		Using add-apt to Install and Remove Repositories
		Using dpkg to Install, Remove, and Inspect Packages
		Using apt to Search, Inspect, Install, and Remove Packages
		Using tasksel
	Managing Software on Fedora
		Using dnf to Manage Repositories
		Using dnf to Manage Software
	Managing Software on openSUSE
		Using zypper to Manage Repositories
		Using zypper to Manage Software
Index
About the Author