Book Image

Mastering Linux Administration

By : Alexandru Calcatinge, Julian Balog
Book Image

Mastering Linux Administration

By: Alexandru Calcatinge, Julian Balog

Overview of this book

Linux plays a significant role in modern data center management and provides great versatility in deploying and managing your workloads on-premises and in the cloud. This book covers the important topics you need to know about for your everyday Linux administration tasks. The book starts by helping you understand the Linux command line and how to work with files, packages, and filesystems. You'll then begin administering network services and hardening security, and learn about cloud computing, containers, and orchestration. Once you've learned how to work with the command line, you'll explore the essential Linux commands for managing users, processes, and daemons and discover how to secure your Linux environment using application security frameworks and firewall managers. As you advance through the chapters, you'll work with containers, hypervisors, virtual machines, Ansible, and Kubernetes. You'll also learn how to deploy Linux to the cloud using AWS and Azure. By the end of this Linux book, you'll be well-versed with Linux and have mastered everyday administrative tasks using workflows spanning from on-premises to the cloud. If you also find yourself adopting DevOps practices in the process, we'll consider our mission accomplished.
Table of Contents (20 chapters)
Section 1: Linux Basic Administration
Section 2: Advanced Linux Server Administration
Section 3: Cloud Administration

Working with files and directories

Remember that everything in Linux is a file. A directory is a file too. As such, it is essential to know how to work with them. Working with files in Linux implies the use of several commands for basic file and directory operations, file viewing, file creation, file location, file properties, and linking. Some of the commands, which will not be covered here but their use is closely related to files, will be covered in the following section.

Understanding file paths

Each file in the FHS has a path. The path is the file's location represented in an easily readable representation. In Linux, all the files are stored in the root directory by using the FHS as a standard to organize them. Relations between files and directories inside this system are expressed through the forward-slash character (/). Throughout computing history, this was used as a symbol that described addresses. Paths are, in fact, addresses for files.

There are two types...