Book Image

Mastering Ubuntu Server - Fourth Edition

By : Jay LaCroix
4.8 (5)
Book Image

Mastering Ubuntu Server - Fourth Edition

4.8 (5)
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)
24
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25
Index

Viewing the contents of files

The Linux filesystem contains many directories and files. In the case of files, we need to learn how to read and manipulate them to round out our knowledge. We’ll cover more topics surrounding file management in the next chapter. For now, we can benefit by taking a look at how to view the content of existing files.

We can print the contents of a file to the screen with the cat command, along with a filename as an argument. The following command, for example, can be used to view the contents of testfile.txt in our current working directory, which we created earlier in the chapter when we discussed the touch command. Sure, this exercise is rather pointless since that file is empty, but it offers a good first example:

cat testfile.txt

There’s no output, since again, the file is empty. So, let’s instead take a look at a more practical example. Here’s a file we can use cat against that actually does have content inside...