Book Image

Mastering Ubuntu Server. - Second Edition

By : Jay LaCroix
Book Image

Mastering Ubuntu Server. - Second Edition

By: Jay LaCroix

Overview of this book

Ubuntu Server has taken the data centers by storm. Whether you're deploying Ubuntu for a large-scale project or for a small office, it is a stable, customizable, and powerful Linux distribution that leads the way with innovative and cutting-edge features. For both simple and complex server deployments, Ubuntu's flexible nature can be easily adapted to meet to the needs of your organization. With this book as your guide, you will learn all about Ubuntu Server, from initial deployment to creating production-ready resources for your network. The book begins with the concept of user management, group management, and filesystem permissions. Continuing into managing storage volumes, you will learn how to format storage devices, utilize logical volume management, and monitor disk usage. Later, you will learn how to virtualize hosts and applications, which will cover setting up KVM/QEMU, as well as containerization with both Docker and LXD. As the book continues, you will learn how to automate configuration with Ansible, as well as take a look at writing scripts. Lastly, you will explore best practices and troubleshooting techniques when working with Ubuntu Server that are applicable to real-world scenarios. By the end of the book, you will be an expert Ubuntu Server administrator who is well-versed in its advanced concepts.
Table of Contents (21 chapters)

Understanding RAID

Now that we know the ins and outs of managing storage, we must face a simple and uncomfortable truth: disks fail. It's not a matter of if, but when—all disks will fail eventually. When they do, we rely on our backups and disaster recovery procedures to get up and running. One thing that can help us with this burden is RAID, which is an acronym for Redundant Array of Inexpensive Disks. The basic idea of RAID is that when a disk does fail, we don't lose any data (unless additional disks fail) and we'll continue on without any significant downtime assuming we replace the disk within a reasonable time frame. This isn't used as a backup, but it is a nice safety net in a situation where we lose a disk.

There are two types of RAID, hardware RAID and software RAID. With hardware RAID, the operating system is completely oblivious to the fact...