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)

Simplifying SSH connections with a config file

Before we leave the topic of SSH, there's another trick that benefits convenience, and that is the creation of a local configuration file for SSH. This file must be stored in the .ssh directory of your home directory, and be named config. The full path would look something like this:

/home/jay/.ssh/config

This file doesn't exist by default, but if it's found, SSH will parse it and you'll be able to benefit from it. Go ahead and open this file in your text editor, such as nano:

nano /home/your_username/.ssh/config

This config file allows you to type configuration for servers that you connect to often, which can simplify the SSH command automatically. The following are example contents from such a file that will help me illustrate what it does:

host myserver 
    Hostname 192.168.1.23 
    Port 22 
    User jdoe...