Linux Administration A Beginner’s Guide

Cover
Title Page
Copyright Page
Contents
Acknowledgments
Introduction
Part I: Introduction, Installation, and Software Management
	1 Technical Summary of Linux Distributions
		Linux: The Operating System
		What Is Open Source Software and GNU All About?
		The Advantages of Open Source Software
		Understanding the Differences Between Windows and Linux
		Summary
	2 Installing Linux in a Server Configuration
		Hardware and Environmental Considerations
		Server Design
		Methods of Installation
		Installing Fedora
		The Installation
		Installation Summary
		Installing Ubuntu Server
		Summary
	3 The Command Line
		An Introduction to Bash
		Command-Line Shortcuts
		Documentation Tools
		Files, File Types, File Ownership, and File Permissions
		File Management and Manipulation
		Editors
		Miscellaneous Tools
		Putting It All Together (Moving a User and Its Home Directory)
		Summary
	4 Managing Software
		The Red Hat Package Manager
		Managing Software Using RPM
		Yum
		DNF
		GUI RPM Package Managers
		The Debian Package Management System
		Software Management in Ubuntu
		Compile and Install GNU Software
		Common Problems When Building from Source Code
		Summary
Part II: Single-Host Administration
	5 Managing Users and Groups
		What Exactly Constitutes a User?
		Where User Information Is Kept
		User Management Tools
		Users and Access Permissions
		Pluggable Authentication Modules
		A Grand Tour
		Summary
	6 Booting and Shutting Down
		Boot Loaders
		The init Process
		rc Scripts
		Enabling and Disabling Services
		Graphical Service Managers
		Odds and Ends of Booting and Shutting Down
		Summary
	7 File Systems
		The Makeup of File Systems
		Managing File Systems
		Adding a New Disk
		Volume Management
		Creating File Systems
		Summary
	8 Core System Services
		The init Daemon
		xinetd and inetd
		The Logging Daemon
		The cron Program
		Summary
	9 The Linux Kernel
		What Exactly Is a Kernel?
		Finding the Kernel Source Code
		Building the Kernel
		Patching the Kernel
		Summary
	10 Knobs and Dials: API (Virtual) File Systems
		What’s Inside the /proc Directory?
		Some Useful /proc Entries
		Common proc Settings and Reports
		SysFS
		cgroupfs
		tmpfs
		Summary
Part III: Networking and Security
	11 TCP/IP for System Administrators
		The Layers
		Headers
		A Complete TCP Connection
		How ARP Works
		Bringing IP Networks Together
		tcpdump Bits and Bobs
		IPv6
		Summary
	12 Network Configuration
		Modules and Network Interfaces
		Managing Routes
		A Simple Linux Router
		How Linux Chooses an IP Address
		Hostname Configuration
		Summary
	13 Linux Firewall (Netfilter)
		How Netfilter Works
		Installing Netfilter
		Configuring Netfilter
		Cookbook Solutions
		Summary
	14 Local Security
		Common Sources of Risk
		Picking the Right Runlevel
		Nonhuman User Accounts
		Limited Resources
		Mitigating Risk
		Monitoring Your System
		Summary
	15 Network Security
		TCP/IP and Network Security
		Tracking Services
		Binding to an Interface
		Shutting Down Services
		Monitoring Your System
		Handling Attacks
		Network Security Tools
		Summary
Part IV: Internet Services
	16 Domain Name System (DNS)
		The Hosts File
		How DNS Works
		Installing a DNS Server
		Configuring a DNS Server
		DNS Records Types
		Setting Up BIND Database Files
		The DNS Toolbox
		Configuring DNS Clients
		Summary
	17 File Transfer Protocol (FTP)
		The Mechanics of FTP
		Obtaining and Installing vsftpd
		Customizing the FTP Server
		Summary
	18 Apache Web Server
		Understanding HTTP
		Installing the Apache HTTP Server
		Starting Up and Shutting Down Apache
		Testing Your Installation
		Configuring Apache
		Troubleshooting Apache
		Summary
	19 Simple Mail Transfer Protocol (SMTP)
		Understanding SMTP
		Installing the Postfix Server
		Configuring the Postfix Server
		Running the Server
		Summary
	20 Post Office Protocol and Internet Mail Access Protocol (POP and IMAP)
		POP3 and IMAP Protocol Basics
		Dovecot (IMAP and POP3 Server)
		Installing Dovecot
		Other Issues with Mail Services
		Summary
	21 Voice over Internet Protocol (VoIP)
		VoIP Overview
		VoIP Implementations
		Asterisk
		Asterisk Installation
		Understanding Asterisk Configuration Files and Structure
		Asterisk Network, Port, and Firewall Requirements
		Configuring the PBX
		Asterisk Maintenance and Troubleshooting
		Summary
	22 Secure Shell (SSH)
		Understanding Public Key Cryptography
		Understanding SSH Versions
		Server Start-up and Shutdown
		SSHD Configuration File
		Using OpenSSH
		Files Used by the OpenSSH Client
		Summary
Part V: Intranet Services
	23 Network File System (NFS)
		The Mechanics of NFS
		Enabling NFS in Fedora, RHEL, and Centos
		Enabling NFS in Ubuntu
		The Components of NFS
		Configuring an NFS Server
		Configuring NFS Clients
		Troubleshooting Client-Side NFS Issues
		Sample NFS Client and NFS Server Configuration
		Common Uses for NFS
		Summary
	24 Samba
		The Mechanics of SMB
		Samba Administration
		Creating a Share
		Mounting Remote Samba Shares
		Samba Users
		Using Samba to Authenticate Against a Windows Server
		Troubleshooting Samba
		Summary
	25 Distributed File Systems (DFS)
		DFS Overview
		DFS Implementations
		Summary
	26 Network Information Service (NIS)
		Inside NIS
		The NIS Servers
		Configuring the Master NIS Server
		Configuring an NIS Client
		Editing the /etc/nsswitch.conf File
		NIS at Work
		Configuring a Secondary NIS Server
		NIS Tools
		Implementing NIS in a Real Network
		Summary
	27 Lightweight Directory Access Protocol (LDAP)
		LDAP Basics
		OpenLDAP
		Configuring OpenLDAP Clients
		Searching, Querying, and Modifying the Directory
		Using OpenLDAP for User Authentication
		Summary
	28 Printing
		Printing Terminologies
		The CUPS System
		Adding Printers
		Routine CUPS Administration
		Using Client-Side Printing Tools
		Summary
	29 Dynamic Host Configuration Protocol (DHCP)
		The Mechanics of DHCP
		The DHCP Server
		The DHCP Client Daemon
		Summary
	30 Virtualization
		Why Virtualize?
		Virtualization Implementations
		KVM
		Setting Up KVM in Ubuntu/Debian
		Containers
		Summary
	31 Backups
		Evaluating Your Backup Needs
		Command-Line Backup Tools
		Miscellaneous Backup Solutions
		Summary
Part VI: Appendixes
	A: Creating a Linux Installer on Flash/USB Devices
		Creating a Linux Installer on Flash/USB Devices (via Linux OS)
		Creating a Linux Installer on Flash/USB Devices (via Microsoft Windows)
	B: Demo Virtual Machine
		Basic Host System Requirements
		Installing the Virtualization Applications and Utilities
		Download and Prep the Demo VM Image File
		Import the Demo VM Image and Create a New VM Instance
		Connecting to the Demo VM
		Feedback
Index
	A
	B
	C
	D
	E
	F
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	H
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	Q
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