Preface

In this book, the goal is to build a solid foundation of learning all the essentials of the Linux command line to get you started. It has been designed to strongly focus on learning only the practical core skills and essential Linux knowledge, which is really important when beginning this wonderful OS in an easy way. All the examples shown in this course have been carefully chosen to be everyday and real-world tasks, use cases, and problems Linux beginners or system administrators will probably encounter when starting out from scratch. We begin our journey with the virtualization software and install CentOS 7 Linux as a VM. Then, we will gently introduce you to the most basic command-line operations, such as cursor movement, commands, options and arguments, history, quoting and globbing, file streams and pipes, and getting help, and then introduce you to the wonderful art of regular expressions and how to work with files. Then, the most essential everyday Linux commands are demonstrated and explained, and a compact introduction to Bash shell scripting provided. Finally, the reader is introduced to advanced topics such as networking, how to troubleshoot your system, advanced file permissions, ACL, setuid, setgid, and sticky bit. This is just the starting point and there is so much more you can learn about Linux.