Book Image

Mastering Ubuntu Server - Fourth Edition

By : Jay LaCroix
4.8 (6)
Book Image

Mastering Ubuntu Server - Fourth Edition

4.8 (6)
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

Tracing network issues

It’s amazing how important TCP/IP networking is to the world today. Of all the protocols in use in modern computing, it’s by far the most widespread. But it’s also one of the most annoying situations to figure out when it’s not working well. Thankfully, Ubuntu features really handy utilities you can use in order to pinpoint what’s going on.

First, let’s look at connectivity. After all, if you can’t connect to a network, your server is essentially useless. In most cases, Ubuntu recognizes just about all network cards without fail, and it will automatically connect your server or workstation to your network if it is within reach of a DHCP server.

While troubleshooting, get the obvious stuff out of the way first. The following may seem like a no-brainer, but you’d be surprised how often one can miss something obvious. I’m going to assume you’ve already checked to make sure network cables...