Book Image

Mastering Ubuntu Server

By : Jay LaCroix
Book Image

Mastering Ubuntu Server

By: Jay LaCroix

Overview of this book

Ubuntu is a Debian-based Linux operating system, and has various versions targeted at servers, desktops, phones, tablets and televisions. The Ubuntu Server Edition, also called Ubuntu Server, offers support for several common configurations, and also simplifies common Linux server deployment processes. With this book as their guide, readers will be able to configure and deploy Ubuntu Servers using Ubuntu Server 16.04, with all the skills necessary to manage real servers. The book begins with the concept of user management, group management, as well as file-system permissions. To manage your storage on Ubuntu Server systems, you will learn how to add and format storage and view disk usage. Later, you will also learn how to configure network interfaces, manage IP addresses, deploy Network Manager in order to connect to networks, and manage network interfaces. Furthermore, you will understand how to start and stop services so that you can manage running processes on Linux servers. The book will then demonstrate how to access and share files to or from Ubuntu Servers. You will learn how to create and manage databases using MariaDB and share web content with Apache. To virtualize hosts and applications, you will be shown how to set up KVM/Qemu and Docker and manage virtual machines with virt-manager. Lastly, you will explore best practices and troubleshooting techniques when working with Ubuntu Servers. By the end of the book, you will be an expert Ubuntu Server user well-versed in its advanced concepts.
Table of Contents (22 chapters)
Mastering Ubuntu Server
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

Keeping your system clock in sync with NTP


It's incredibly important for Linux servers to keep their time synchronized, as strange things can happen when a server's clock is wrong. One issue I've run into that's especially a problem is file synchronization utilities, which will exhibit strange behavior when there are time issues. However, Ubuntu servers feature the Network Time Protocol client and server within the default repositories to help keep your time in sync. If it's not already installed, all you should need to do is install the ntp package:

# apt-get install ntp

Once installed, the ntp daemon will immediately start and will keep your time up to date. To verify, check the status of the ntp daemon with one of the following commands depending on the age of your server:

systemctl status ntp
/etc/init.d/ntp status

The output should show that ntp is running:

Active: active (running) since Sun 2016-05-06 14:09:28 EST; 3s ago

If all you wanted was a working NTP client, then you're actually...