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Command-Line and Filesystem Navigation

In this chapter, our objective is to identify the purpose of important directories in the CentOS 7 filesystem, and to learn various basic command-line skills. When we are working on the command line, it is essential that we have a clear picture of the filesystem hierarchy, layout, and organization in mind. We will go through the variety of documentation that exists on CentOS 7, including man pages, info pages, help command options, and so on. Thereafter, we will learn various filesystem navigation and management commands for changing directories, copying, moving, and renaming files, and so on. Finally, we'll learn about archiving and compressing files, which are very often required when creating backups.

In this chapter, we will cover the following:

Understanding the CentOS 7 filesystem hierarchy
Using man pages and the help command...

Key benefits

No previous Linux environment experience needed for reading this book

Get comfortable with a popular and stable Red Hat Enterprise Linux distribution

Most of the command line based concepts are explained with graphics

Description

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.

What you will learn

Understand file system hierarchy and essential command-line skills

Use Vi editor, I/O redirections and how to work with common text manipulating tools

Create, delete, modify user accounts and manage passwords and their aging policy

Manage file ownership, permissions, and ACL

Execute process management and monitoring on the command line

Validate and manage network configuration using nmcli

Manage remote logins using SSH and file transfer using SCP and Rsync

Understand system logging, how to control system services with systemd and systemctl, and manage firewalId

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