Book Image

Learn Linux Quickly

By : Ahmed AlKabary
Book Image

Learn Linux Quickly

By: Ahmed AlKabary

Overview of this book

Linux is one of the most sought-after skills in the IT industry, with jobs involving Linux being increasingly in demand. Linux is by far the most popular operating system deployed in both public and private clouds; it is the processing power behind the majority of IoT and embedded devices. Do you use a mobile device that runs on Android? Even Android is a Linux distribution. This Linux book is a practical guide that lets you explore the power of the Linux command-line interface. Starting with the history of Linux, you'll quickly progress to the Linux filesystem hierarchy and learn a variety of basic Linux commands. You'll then understand how to make use of the extensive Linux documentation and help tools. The book shows you how to manage users and groups and takes you through the process of installing and managing software on Linux systems. As you advance, you'll discover how you can interact with Linux processes and troubleshoot network problems before learning the art of writing bash scripts and automating administrative tasks with Cron jobs. In addition to this, you'll get to create your own Linux commands and analyze various disk management techniques. By the end of this book, you'll have gained the Linux skills required to become an efficient Linux system administrator and be able to manage and work productively on Linux systems.
Table of Contents (24 chapters)

The vi editor

The nano editor is usually the editor of choice for beginners. It is a great editor, but let's just say that it's not the most efficient editor out there. The vi editor is a more advanced Linux editor with tons of features and is by far the most popular editor among advanced Linux users.

Let's open the facts.txt file with the vi editor; to do that, you run the vi facts.txt command:

elliot@ubuntu-linux:~$ vi facts.txt

This will open the vi editor, as shown in the following screenshot:

Figure 13: The facts.txt file opened in vi

Unlike the nano editor, the vi editor works in two different modes:

  1. insert mode
  2. command mode

The insert mode enables you to insert text into a file. On the other hand, the command mode allows you to do things like copying, pasting, and deleting text. The command mode also allows you to search and replace text along with many other things.

Insert mode

By default, you enter command mode when you first open the vi editor, and you can...