Book Image

Mastering Ubuntu Server - Fourth Edition

By : Jay LaCroix
4.7 (7)
Book Image

Mastering Ubuntu Server - Fourth Edition

4.7 (7)
By: Jay LaCroix

Overview of this book

Ubuntu Server is taking the server world by storm - and for a good reason! The server-focused spin of Ubuntu is a stable, flexible, and powerful enterprise-class distribution of Linux with a focus on running servers both small and large. Mastering Ubuntu Server is a book that will teach you everything you need to know in order to manage real Ubuntu-based servers in actual production deployments. This book will take you from initial installation to deploying production-ready solutions to empower your small office network, or even a full data center. You'll see examples of running an Ubuntu Server in the cloud, be walked through set up popular applications (such as Nextcloud), host your own websites, and deploy network resources such as DHCP, DNS, and others. You’ll also see how to containerize applications via LXD to maximize efficiency and learn how to build Kubernetes clusters. This new fourth edition updates the popular book to cover Ubuntu 22.04 LTS, which takes advantage of the latest in Linux-based technologies. By the end of this Ubuntu book, you will have gained all the knowledge you need in order to work on real-life Ubuntu Server deployments and become an expert Ubuntu Server administrator who is well versed in its feature set.
Table of Contents (26 chapters)
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Input and output streams

During our journey into Ubuntu Server so far, we’ve worked quite a bit within the terminal. We’ve been able to inspect the contents of files, insert text into files, and more. We’ve actually been working with streams the entire time without knowing it. In this section, we’re going to talk about this subject in more detail.

If you’ve studied computer science at all, then you probably already know that output refers to things that are printed out of the computer (for example, text being printed to the screen, or onto paper from a printer) and input refers to data that is being entered into a computer, whether that be on the command line, into a file, or similar.

Linux takes this concept a bit further. Streams in Linux refer to a special way to handle what’s going in or out, and beyond the input and output streams, we also have a third that refers to errors.

Output streams in Linux are referred to as Standard...