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Red Hat Enterprise Linux 8 Administration

You're reading from   Red Hat Enterprise Linux 8 Administration Master Linux administration skills and prepare for the RHCSA certification exam

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Product type Paperback
Published in Nov 2021
Publisher Packt
ISBN-13 9781800569829
Length 534 pages
Edition 1st Edition
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Authors (3):
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Scott McCarty Scott McCarty
Author Profile Icon Scott McCarty
Scott McCarty
Pablo Iranzo Gómez Pablo Iranzo Gómez
Author Profile Icon Pablo Iranzo Gómez
Pablo Iranzo Gómez
Miguel Pérez Colino Miguel Pérez Colino
Author Profile Icon Miguel Pérez Colino
Miguel Pérez Colino
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Toc

Table of Contents (25) Chapters Close

Preface 1. Section 1: Systems Administration – Software, User, Network, and Services Management
2. Chapter 1: Installing RHEL8 FREE CHAPTER 3. Chapter 2: RHEL8 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. Section 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. Section 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. Section 4: Practical Exercises
22. Chapter 18: Practice Exercises – 1 23. Chapter 19: Practice Exercise – 2 24. Other Books You May Enjoy

Creating and extending logical volumes

We currently have several physical volumes created and two of them grouped into a volume group. Let's move to the next layers and check the logical volumes with the lvs command:

[root@rhel8 ~]# lvs
  LV   VG   Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root rhel -wi-ao---- <8,00g
  swap rhel -wi-ao----  1,00g  

We see the root and swap volumes on the rhel volume group, which hosts the operating system.

Now, we can create a simple logical volume called data, 200 MB in size, on the storage volume group:

[root@rhel8 ~]# lvcreate --name data --size 200MB storage 
  Logical volume "data" created.
[root@rhel8 ~]# lvs
  LV   VG      Attr       LSize ...
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