Book Image

CentOS Quick Start Guide

By : Shiwang Kalkhanda
Book Image

CentOS Quick Start Guide

By: Shiwang Kalkhanda

Overview of this book

Linux kernel development has been the worlds largest collaborative project to date. With this practical guide, you will learn Linux through one of its most popular and stable distributions. This book will introduce you to essential Linux skills using CentOS 7. It describes how a Linux system is organized, and will introduce you to key command-line concepts you can practice on your own. It will guide you in performing basic system administration tasks and day-to-day operations in a Linux environment. You will learn core system administration skills for managing a system running CentOS 7 or a similar operating system, such as RHEL 7, Scientific Linux, and Oracle Linux. You will be able to perform installation, establish network connectivity and user and process management, modify file permissions, manage text files using the command line, and implement basic security administration after covering this book. By the end of this book, you will have a solid understanding of working with Linux using the command line.
Table of Contents (11 chapters)

Editing files with the vi editor

The vi editor is the most popular editor used to edit or create new files from a shell prompt. It comes in text-based as well graphical interface form, with extended features. This text-based editor is used to write a script, edit system configuration files, or develop the source code of a programming language. The name vi is pronounced as vee-eye.

The vim (short for vi improved) version of the vi editor comes with many enhancements to make working with the vi editor easier. It supports extended features, such as syntax highlighting for many configuration files and programming languages. Whatever we learn about vi editor is applicable to vim also, so we will learn about the vi editor in this section.

There are three modes of operation of the vi editor, as follows:

  • Command Mode
  • Insert Mode
  • Line Mode

The following diagram shows the different modes...