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UNIX and Linux System Administration Handbook

(UNIX-LINUX-ADM.AB1) / ISBN : 978-1-64459-476-6
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About This Course

Skills You’ll Get

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1

Introduction

  • The Organization of this course
2

Where to Start

  • Essential duties of a system administrator
  • Suggested background
  • Linux distributions
  • Example systems used in this course
  • Notation and typographical conventions
  • Units
  • Man pages and other on-line documentation
  • Other authoritative documentation
  • Other sources of information
  • Ways to find and install software
  • Where to host
  • Specialization and adjacent disciplines
  • Recommended reading
3

Booting and System Management Daemons

  • Boot process overview
  • System firmware
  • Boot loaders
  • GRUB: the GRand Unified Boot loader
  • The FreeBSD boot process
  • System management daemons
  • systemd in detail
  • FreeBSD init and startup scripts
  • Reboot and shutdown procedures
  • Stratagems for a nonbooting system
4

Access Control and Rootly Powers

  • Standard UNIX access control
  • Management of the root account
  • Extensions to the standard access control model
  • Modern access control
  • Recommended reading
5

Process Control

  • Components of a process
  • The life cycle of a process
  • ps: monitor processes
  • Interactive monitoring with top
  • nice and renice: influence scheduling priority
  • The /proc filesystem
  • strace and truss: trace signals and system calls
  • Runaway processes
  • Periodic processes
6

The Filesystem

  • Pathnames
  • Filesystem mounting and unmounting
  • Organization of the file tree
  • File types
  • File attributes
  • Access control lists
7

Software Installation and Management

  • Operating system installation
  • Managing packages
  • Linux package management systems
  • High-level Linux package management systems
  • FreeBSD software management
  • Software localization and configuration
  • Recommended reading
8

Scripting and the Shell

  • Scripting philosophy
  • Shell basics
  • sh scripting
  • Regular expressions
  • Python programming
  • Ruby programming
  • Library and environment management for Python and Ruby
  • Revision control with Git
  • Recommended reading
9

User Management

  • Account mechanics
  • The /etc/passwd file
  • The Linux /etc/shadow file
  • FreeBSD's /etc/master.passwd and /etc/login.conf files
  • The /etc/group file
  • Manual steps for adding users
  • Scripts for adding users: useradd, adduser, and newusers
  • Safe removal of a user’s account and files
  • User login lockout
  • Risk reduction with PAM
  • Centralized account management
10

Cloud Computing

  • The cloud in context
  • Cloud platform choices
  • Cloud service fundamentals
  • Clouds: VPS quick start by platform
  • Cost control
  • Recommended Reading
11

Logging

  • Log locations
  • The systemd journal
  • Syslog
  • Kernel and boot-time logging
  • Management and rotation of log files
  • Management of logs at scale
  • Logging policies
12

Drivers and the Kernel

  • Kernel chores for system administrators
  • Kernel version numbering
  • Devices and their drivers
  • Linux kernel configuration
  • FreeBSD kernel configuration
  • Loadable kernel modules
  • Booting
  • Booting alternate kernels in the cloud
  • Kernel errors
  • Recommended reading
13

Printing

  • CUPS printing
  • CUPS server administration
  • Troubleshooting tips
  • Recommended reading
14

TCP/IP Networking

  • TCP/IP and its relationship to the Internet
  • Networking basics
  • Packet addressing
  • IP addresses: the gory details
  • Routing
  • IPv4 ARP and IPv6 neighbor discovery
  • DHCP: the Dynamic Host Configuration Protocol
  • Security issues
  • Basic network configuration
  • Linux networking
  • FreeBSD networking
  • Network troubleshooting
  • Network monitoring
  • Firewalls and NAT
  • Cloud networking
  • Recommended reading
15

Physical Networking

  • Ethernet: the Swiss Army knife of networking
  • Wireless: Ethernet for nomads
  • SDN: software-defined networking
  • Network testing and debugging
  • Building wiring
  • Network design issues
  • Management issues
  • Recommended vendors
  • Recommended reading
16

IP Routing

  • Packet forwarding: a closer look
  • Routing daemons and routing protocols
  • Protocols on parade
  • Routing protocol multicast coordination
  • Routing strategy selection criteria
  • Routing daemons
  • Cisco routers
  • Recommended reading
17

DNS: The Domain Name System

  • DNS architecture
  • DNS for lookups
  • The DNS namespace
  • How DNS works
  • The DNS database
  • The BIND software
  • Split DNS and the view statement
  • BIND configuration examples
  • Zone file updating
  • DNS security issues
  • BIND debugging
  • Recommended reading
18

Single Sign-On

  • Core SSO elements
  • LDAP: “lightweight” directory services
  • Using directory services for login
  • Alternative approaches
  • Recommended reading
19

Electronic Mail

  • Mail system architecture
  • Anatomy of a mail message
  • The SMTP protocol
  • Spam and malware
  • Message privacy and encryption
  • Mail aliases
  • Email configuration
  • sendmail
  • Exim
  • Postfix
  • Recommended reading
20

Web Hosting

  • HTTP: the Hypertext Transfer Protocol
  • Web software basics
  • Web hosting in the cloud
  • Apache httpd
  • NGINX
  • HAProxy
  • Recommended reading
21

Storage

  • I just want to add a disk!
  • Storage hardware
  • Storage hardware interfaces
  • Attachment and low-level management of drives
  • The software side of storage: peeling the onion
  • Disk partitioning
  • Logical volume management
  • RAID: redundant arrays of inexpensive disks
  • Filesystems
  • Traditional filesystems: UFS, ext4, and XFS
  • Next-generation filesystems: ZFS and Btrfs
  • ZFS: all your storage problems solved
  • Btrfs: “ZFS lite” for Linux
  • Data backup strategy
  • Recommended reading
22

The Network File System

  • Meet network file services
  • The NFS approach
  • Server-side NFS
  • Client-side NFS
  • Identity mapping for NFS version 4
  • nfsstat: dump NFS statistics
  • Dedicated NFS file servers
  • Automatic mounting
  • Recommended reading
23

SMB

  • Samba: SMB server for UNIX
  • Installing and configuring Samba
  • Mounting SMB file shares
  • Browsing SMB file shares
  • Ensuring Samba security
  • Debugging Samba
  • Recommended reading
24

Configuration Management

  • Configuration management in a nutshell
  • Dangers of configuration management
  • Elements of configuration management
  • Popular CM systems compared
  • Introduction to Ansible
  • Introduction to Salt
  • Ansible and Salt compared
  • Best practices
  • Recommended reading
25

Virtualization

  • Virtual vernacular
  • Virtualization with Linux
  • FreeBSD bhyve
  • VMware
  • VirtualBox
  • Packer
  • Vagrant
  • Recommended reading
26

Containers

  • Background and core concepts
  • Docker: the open source container engine
  • Containers in practice
  • Container clustering and management
  • Recommended reading
27

Continuous Integration and Delivery

  • CI/CD essentials
  • Pipelines
  • Jenkins: the open source automation server
  • CI/CD in practice
  • Containers and CI/CD
  • Recommended reading
28

Security

  • Elements of security
  • How security is compromised
  • Basic security measures
  • Passwords and user accounts
  • Security power tools
  • Cryptography primer
  • SSH, the Secure SHell
  • Firewalls
  • Virtual private networks (VPNs)
  • Certifications and standards
  • Sources of security information
  • When your site has been attacked
  • Recommended reading
29

Monitoring

  • An overview of monitoring
  • The monitoring culture
  • The monitoring platforms
  • Data collection
  • Network monitoring
  • Systems monitoring
  • Application monitoring
  • Security monitoring
  • SNMP: the Simple Network Management Protocol
  • Tips and tricks for monitoring
  • Recommended reading
30

Performance Analysis

  • Performance tuning philosophy
  • Ways to improve performance
  • Factors that affect performance
  • Stolen CPU cycles
  • Analysis of performance problems
  • System performance checkup
  • Help! My server just got really slow!
  • Recommended reading
31

Data Center Basics

  • Racks
  • Power
  • Cooling and environment
  • Data center reliability tiers
  • Data center security
  • Tools
  • Recommended reading
32

Methodology, Policy, and Politics

  • The grand unified theory: DevOps
  • Ticketing and task management systems
  • Local documentation maintenance
  • Environment separation
  • Disaster management
  • IT policies and procedures
  • Service level agreements
  • Compliance: regulations and standards
  • Legal issues
  • Organizations, conferences, and other resources
  • Recommended reading

1

Where to Start

  • Building Software from Source Code
2

Booting and System Management Daemons

  • Using systemd Commands
3

Process Control

  • Using ps Commands
  • Creating a cron Job
4

The Filesystem

  • Using the chmod Command
5

Scripting and the Shell

  • Working with Arithmetic Operations and Loops
  • Executing the sh Script
6

Cloud Computing

  • Creating an Instance in GCP
  • Creating an EC2 Auto Scaling Group
7

Logging

  • Using journalctl Commands
8

TCP/IP Networking

  • Obtaining the IP Route Information from the IP Routing Table
  • Capturing Network Packets Using tcpdump
  • Capturing a Packet Using tshark
  • Creating a VPC
9

Physical Networking

  • Using Commands for Wireless Connectivity
10

IP Routing

  • Configuring OSPF
  • Configuring BGP Redistribution
  • Configuring EIGRP
11

DNS: The Domain Name System

  • Performing Zone Transfer Using dig
  • Signing a Zone
12

Single Sign-On

  • Examining Kerberos Settings
13

Web Hosting

  • Using the curl Command
  • Creating a Load Balancer in GCP
14

Storage

  • Partitioning a Disk
15

The Network File System

  • Configuring NFS Server
16

SMB

  • Configuring Samba
  • Creating an SMB File Share
17

Configuration Management

  • Using the Ansible Tool
  • Using Ansible Vault
  • Creating Ansible Roles
  • Creating an Ansible Configuration File
18

Virtualization

  • Checking Hyper-V Compatibility
19

Containers

  • Running Docker daemon Commands
  • Using Docker
20

Security

  • Using Social Engineering Techniques to Plan an Attack
  • Simulating the DDoS Attack
  • Performing Nmap Port Scanning
  • Cracking a Linux Password Using John the Ripper
  • Generating a Symmetric Key
  • Generating an Asymmetric Key
  • Examining Asymmetric Encryption
  • Performing Symmetric Encryption
21

Performance Analysis

  • Using Performance Analysis Commands

UNIX and Linux System Administration Handbook

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