Book Image

Fundamentals of Linux

By : Oliver Pelz
Book Image

Fundamentals of Linux

By: Oliver Pelz

Overview of this book

Linux is a Unix-like operating system assembled under the model of free and open source software development and distribution. Fundamentals of Linux will help you learn all the essentials of the Linux command line required to get you started. The book will start by teaching you how to work with virtualization software and install CentOS 7 Linux as a VM. Then, you will get to grips with the workings of various command line operations, such as cursor movement, commands, options, and arguments. As you make your way through the chapters, the book will not only focus on the most essential Linux commands but also give an introduction to Bash shell scripting. Finally, you will explore advanced topics, such as networking and troubleshooting your system, and you will get familiar with the advanced file permissions: ACL, setuid, and setgid. Fundamentals of Linux includes real-world tasks, use cases, and problems that, as a system administrator, you might encounter in your day-to-day activities.
Table of Contents (7 chapters)

Understanding standard streams

In this section, you will learn why every command can use three standard streams for accessing its input and output. Also, you will learn how to work with those input and output streams and how to use redirection. Finally, we will learn how to use pipes and why they are so important. One philosophy of the Linux operating system is that every command has exactly one functionality in the system, nothing more, and nothing less. For example, there's one command to list files, another to sort text, and one to print the file's content, and so on.

Now, one of the most important features of the shell is to connect different commands to create custom tailored solutions and tools for all kinds of problems and workflows. But before we can show you how to concatenate different commands together to build something powerful, we first need to know how...