Linux for system administrators : navigate the complex landscape of the Linux OS and command line for effective administration

Linux for system administrators navigate the complex landscape of the Linux OS and command line for effective administration

Linux system administration is an essential aspect of maintaining and managing Linux servers within an organization. The role of a Linux system administrator is pivotal in ensuring the smooth functioning and security of these servers, making it a critical job function for any company that relies on...

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Detalles Bibliográficos
Otros Autores: Rudareanu, Viorel, author (author), Baturin, Daniil, author
Formato: Libro electrónico
Idioma:Inglés
Publicado: Birmingham, England : Packt Publishing [2023]
Edición:1st ed
Materias:
Linux.
Operating systems (Computers)
Ver en Biblioteca Universitat Ramon Llull:https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009768139206719
Tabla de Contenidos:
  • Cover
  • Title Page
  • Copyright and Credits
  • Contributors
  • Table of Contents
  • Preface
  • Part 1: Linux Basics
  • Chapter 1: Getting to Know Linux
  • The structure of a Linux system
  • The Linux kernel and Linux-based operating systems
  • Kernel versus user space
  • The Linux kernel and the GNU project
  • Open source software licenses
  • Permissive and copyleft licenses
  • Patent grant, tivoization, and SaaS concerns
  • Linux distributions
  • Package managers and package repositories
  • Differences between distributions
  • Linux usage in the modern world
  • Summary
  • Chapter 2: The Shell and Its Commands
  • What is a shell?
  • Basic shell commands
  • Intermediate shell commands
  • Summary
  • Chapter 3: The Linux Filesystem
  • What is a filesystem?
  • High scalability
  • High performance
  • What filesystem does my system use?
  • FUSE filesystem
  • The directory tree and standard directories
  • Links (hard and symbolic)
  • What is an inode?
  • What is a hard link?
  • What are symbolic links?
  • Mounting and unmounting filesystems
  • How to unmount the filesystem
  • Pseudo-filesystems
  • Processes
  • Kernel and system information
  • CPU usage
  • Summary
  • Chapter 4: Processes and Process Control
  • Executables versus processes
  • Process termination and exit codes
  • Exit codes
  • Signals
  • The kill command
  • The process tree
  • Process search and monitoring
  • The ps command
  • Process monitoring tools
  • The /proc filesystem
  • Summary
  • Chapter 5: Hardware Discovery
  • Discovering CPU model and features
  • Feature discovery on different platforms
  • The /proc/cpuinfo file
  • Multi-processor systems
  • High-level CPU discovery utilities
  • Memory discovery
  • Discovering PCI devices
  • Discovering USB devices
  • Discovering storage devices
  • High-level discovery tools
  • dmidecode
  • lshw
  • Summary.
  • Part 2: Configuring and Modifying Linux Systems
  • Chapter 6: Basic System Settings
  • Overview of basic settings
  • The hosts configuration file
  • The resolv configuration file
  • The network-scripts configuration file
  • The dhclient configuration file
  • The sysctl configuration file
  • Summary
  • Chapter 7: User and Group Management
  • Overview of managing accounts/groups
  • How to add a new account
  • Using useradd
  • Using adduser
  • How to delete an account
  • Understanding the/etc/sudoers file
  • Switching users
  • Managing account passwords
  • Locking/unlocking user accounts
  • Setting password expiration
  • Group management
  • Permissions
  • Changing groups
  • Summary
  • Chapter 8: Software Installation and Package Repositories
  • Software installation, packages, and dependencies
  • Package managers
  • Package files
  • Inspecting package files
  • Inspecting installed packages
  • Installing and removing package files
  • Package repositories and high-level package managers
  • Package repositories
  • High-level package managers
  • Searching for packages
  • System upgrade
  • Upgrading a system with YUM or DNF
  • Upgrading a system with APT
  • Summary
  • Further reading
  • Chapter 9: Network Configuration and Debugging
  • Linux network stack
  • Network interfaces and addresses in Linux
  • Discovering physical network devices
  • Network interface names
  • Using the ip command
  • Discovering and inspecting logical links
  • Viewing and changing Ethernet link MAC addresses
  • Viewing and changing IP addresses
  • Routes and neighbor tables
  • ARP and NDP neighbor tables
  • Routes and route tables
  • NetworkManager
  • Distribution-specific configuration methods
  • Debian
  • Old Red Hat-based distributions
  • Network troubleshooting
  • Using ping
  • Using traceroute
  • Summary
  • Chapter 10: Storage Management
  • Adding additional storage volumes.
  • Formatting and partitioning storage devices
  • Formatting a newly created partition
  • Mounting and unmounting volumes
  • Updating the /etc/fstab file
  • Editing /etc/fstab file
  • Utilizing LVM
  • Getting started with LVM
  • Creating a format for logical disks
  • Deleting volumes with LVM
  • Summary
  • Part 3: Linux as a Part of a Larger System
  • Chapter 11: Logging Configuration and Remote Logging
  • Logging configuration
  • How does log data get sent and gathered?
  • Checking rsyslog service on all servers
  • Configuring rsyslog for centralized logging
  • Sending logs to a centralized rsyslog server
  • Log rotation
  • Journald
  • DMESG
  • Understanding the ring buffer in Linux
  • Summary
  • Chapter 12: Centralized Authentication
  • The AAA framework
  • Authentication mechanisms in Linux
  • Information lookup
  • Name Service Switch
  • Pluggable Authentication Modules
  • PAM configuration
  • Limitations of PAM
  • System Security Services Daemon
  • Active Directory authentication with Samba 4
  • Setting up the domain controller
  • Setting up the client
  • Summary
  • Further reading
  • Chapter 13: High Availability
  • Types of redundancy and load balancing
  • Link layer redundancy
  • Network layer redundancy and load balancing
  • Transport layer load balancing with LVS
  • LVS load-balancing methods
  • Saving and restoring LVS configurations
  • Additional LVS options
  • Active/backup configurations and load balancing with Keepalived
  • Installing Keepalived
  • Basics of the VRRP protocol operation
  • Configuring VRRP
  • Configuring virtual servers
  • Application layer load balancing
  • Web application load balancing with HAProxy
  • Summary
  • Further reading
  • Chapter 14: Automation with Chef
  • Overview of infrastructure automation
  • Benefits of automation in Linux
  • Introduction to Chef
  • What is Chef?
  • Key features of Chef.
  • Overview of Chef's architecture
  • Chef server
  • Chef server components
  • Cookbooks and recipes
  • Chef workstation
  • Development workflow
  • Managing environments and roles
  • Chef nodes
  • Node registration
  • Communication with the Chef server
  • Cookbook development
  • Cookbook structure and components
  • Writing recipes and resources
  • Managing infrastructure with Chef
  • Configuration management
  • Chef client-server interaction
  • Reporting and monitoring
  • Data synchronization
  • Benefits of automating infrastructure with Chef in Linux
  • Consistency and scalability
  • Reduced human error
  • Enhanced security
  • Challenges and best practices
  • Best practices for effective Chef implementation
  • Summary
  • Chapter 15: Security Guidelines and Best Practices
  • Common threats and attack types
  • The motivation of attackers and the possible consequences
  • Information security properties and attacks on them
  • Keeping your system secure
  • Reducing the attack surface
  • Compartmentalization and privilege separation
  • Preventing credential theft and brute-force attacks
  • Reducing the risk of software vulnerabilities
  • Summary
  • Further reading
  • Index
  • Other Books You May Enjoy.

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