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Red Hat Enterprise Linux 9 Administration

You're reading from   Red Hat Enterprise Linux 9 Administration A comprehensive Linux system administration guide for RHCSA certification exam candidates

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Product type Paperback
Published in Nov 2022
Publisher Packt
ISBN-13 9781803248806
Length 530 pages
Edition 2nd Edition
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Authors (4):
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Scott McCarty Scott McCarty
Author Profile Icon Scott McCarty
Scott McCarty
At Red Hat, Scott McCarty is a principal product manager for the container subsystem team, which enables key product capabilities in OpenShift Container Platform and Red Hat Enterprise Linux. His focus areas include container runtimes, tools, and images.nScott is a social media start-up veteran, an e-commerce old-timer, and a weathered government research technologist, with experience across a variety of companies and organizations, from seven-person start-ups to 15,000-employee technology companies. This has culminated in a unique perspective on open source software development, delivery, and maintenance.
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See other products by Scott McCarty
Miguel Pérez Colino Miguel Pérez Colino
Author Profile Icon Miguel Pérez Colino
Miguel Pérez Colino
LinkedIn
Miguel is an experienced technology enthusiast with a clear orientation towards IT, free/open source software and open standards. His career has grown in the IT field with connections in every direction. From User Support and Teacher; through Systems and Network Administration; to Systems Engineering, Systems Architecture, IT Strategy definition and now as Senior Manager for the Tanzu portfolio to bring Kubernetes closer to customers. He loves designing solutions and tools, making them useful and easy to use.
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Pedro Ibañez Requena Pedro Ibañez Requena
Author Profile Icon Pedro Ibañez Requena
Pedro Ibañez Requena
LinkedIn
Pedro is a Software Engineer that started his Linux adventure playing with Linux distributions provided on CD by magazines. He was also involved in LUGs while studying at Universitat de València. Currently, he is a Principal Software Engineer in the Red Hat's Telco 5G Field Engineering team, focusing on OpenShift, with experience in Automation, Security, High Availability and Databases. His experience is built in industries like Retail, Financial, Insurance and Telco. He has been involved in the design, configuration and deployment of complex IT systems including data storage, networking, monitoring, PaaS and SaaS systems where he has a broad understanding of different views, needs and risks across the industry. Pedro was born in Alcoy and lives in Valencia, Spain with his family.
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Pablo Iranzo Gómez Pablo Iranzo Gómez
Author Profile Icon Pablo Iranzo Gómez
Pablo Iranzo Gómez
LinkedIn
Pablo Iranzo Gómez is a software engineer whose Linux exposure began while studying physics, a period during which he was also involved in LUGs and some projects related to HPC clusters and system administration and consultancy. Currently, he is a senior software engineer in Red Hat's SolEng department, focusing on OpenShift, with experience in consulting, cloud technical account management, OpenStack software maintenance in industries such as hospitality, retail, airlines, government, telco, 5G, partners, and IT, covering system administration and automation, virtualization, PaaS, support, the cloud, and so on, having a broad understanding of different views, needs, and risks across the industry. Pablo was born and lives in Valencia, Spain with his family.
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Toc

Table of Contents (26) Chapters Close

Preface 1. Part 1 – Systems Administration – Software, User, Network, and Services Management
2. Chapter 1: Getting RHEL Up and Running FREE CHAPTER 3. Chapter 2: RHEL 9 Advanced Installation Options 4. Chapter 3: Basic Commands and Simple Shell Scripts 5. Chapter 4: Tools for Regular Operations 6. Chapter 5: Securing Systems with Users, Groups, and Permissions 7. Chapter 6: Enabling Network Connectivity 8. Chapter 7: Adding, Patching, and Managing Software 9. Part 2 – Security with SSH, SELinux, a Firewall, and System Permissions
10. Chapter 8: Administering Systems Remotely 11. Chapter 9: Securing Network Connectivity with firewalld 12. Chapter 10: Keeping Your System Hardened with SELinux 13. Chapter 11: System Security Profiles with OpenSCAP 14. Part 3 – Resource Administration – Storage, Boot Process, Tuning, and Containers
15. Chapter 12: Managing Local Storage and Filesystems 16. Chapter 13: Flexible Storage Management with LVM 17. Chapter 14: Advanced Storage Management with Stratis and VDO 18. Chapter 15: Understanding the Boot Process 19. Chapter 16: Kernel Tuning and Managing Performance Profiles with tuned 20. Chapter 17: Managing Containers with Podman, Buildah, and Skopeo 21. Part 4 – Practical Exercises
22. Chapter 18: Practice Exercises – 1 23. Chapter 19: Practice Exercise – 2 24. Index 25. Other Books You May Enjoy

Understanding the boot process – BIOS and UEFI booting

Computers have hardware-embedded software controllers, also called firmware, that let you manage the very lowest layers of the hardware. This firmware performs the first recognition of what hardware is available in the system and what hardware features are enabled (such as pre-boot network execution, also called PXE).

In the architecture known as PC (short for Personal Computer), also referred to as x86, which Intel and IBM popularized, the embedded firmware is referred to as Basic Input and Output System (BIOS).

The BIOS boot process, with Linux, takes the following steps:

  1. The machine is powered on, and the BIOS firmware is loaded.
  2. The firmware initializes devices such as the keyboard, mouse, storage, and other peripherals.
  3. The firmware reads the configuration, including the boot order, specifying which storage device is the one to continue the boot process with.
  4. Once the storage device has been...
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Authors (4)

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Profile icon Pablo Iranzo Gómez
Pablo Iranzo Gómez
LinkedIn icon Github icon
Pablo Iranzo Gómez is a software engineer whose Linux exposure began while studying physics, a period during which he was also involved in LUGs and some projects related to HPC clusters and system administration and consultancy. Currently, he is a senior software engineer in Red Hat's SolEng department, focusing on OpenShift, with experience in consulting, cloud technical account management, OpenStack software maintenance in industries such as hospitality, retail, airlines, government, telco, 5G, partners, and IT, covering system administration and automation, virtualization, PaaS, support, the cloud, and so on, having a broad understanding of different views, needs, and risks across the industry. Pablo was born and lives in Valencia, Spain with his family.
Read more
See other products by Pablo Iranzo Gómez
Profile icon Scott McCarty
Scott McCarty
At Red Hat, Scott McCarty is a principal product manager for the container subsystem team, which enables key product capabilities in OpenShift Container Platform and Red Hat Enterprise Linux. His focus areas include container runtimes, tools, and images. Scott is a social media start-up veteran, an e-commerce old-timer, and a weathered government research technologist, with experience across a variety of companies and organizations, from seven-person start-ups to 15,000-employee technology companies. This has culminated in a unique perspective on open source software development, delivery, and maintenance.
Read more
See other products by Scott McCarty
Profile icon Miguel Pérez Colino
Miguel Pérez Colino
LinkedIn icon Github icon
Miguel is an experienced technology enthusiast with a clear orientation towards IT, free/open source software and open standards. His career has grown in the IT field with connections in every direction. From User Support and Teacher; through Systems and Network Administration; to Systems Engineering, Systems Architecture, IT Strategy definition and now as Senior Manager for the Tanzu portfolio to bring Kubernetes closer to customers. He loves designing solutions and tools, making them useful and easy to use.
Read more
See other products by Miguel Pérez Colino
Profile icon Pedro Ibañez Requena
Pedro Ibañez Requena
LinkedIn icon
Pedro is a Software Engineer that started his Linux adventure playing with Linux distributions provided on CD by magazines. He was also involved in LUGs while studying at Universitat de València. Currently, he is a Principal Software Engineer in the Red Hat's Telco 5G Field Engineering team, focusing on OpenShift, with experience in Automation, Security, High Availability and Databases. His experience is built in industries like Retail, Financial, Insurance and Telco. He has been involved in the design, configuration and deployment of complex IT systems including data storage, networking, monitoring, PaaS and SaaS systems where he has a broad understanding of different views, needs and risks across the industry. Pedro was born in Alcoy and lives in Valencia, Spain with his family.
Read more
See other products by Pedro Ibañez Requena
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