Linux command line and shell scripting techniques : master practical aspects of the Linux command line and then use it as a part of the shell scripting process / Vedran Dakic and Jasmin Redzepagic.

Format:

Book

Author/Creator:

Dakic, Vedran, author.

Redzepagic, Jasmin, author.

Language:

English

Subjects (All):

Linux.

Operating systems (Computers).

Scripting languages (Computer science).

Physical Description:

1 online resource (552 pages)

Place of Publication:

Birmingham : Packt Publishing, Limited, [2022]

Biography/History:

Dakic Vedran: Vedran Dakic is a master of electrical engineering and computing and an IT trainer, covering system administration, cloud, automatization, and orchestration courses. He is a certified Red Hat, VMware, and Microsoft trainer. He's currently employed as head of the department of operating systems at Algebra University College in Zagreb. As part of this job, he's a lecturer for 3- and 5-year study programs in system engineering, programming, and multimedia tracks. Also, he does a lot of consulting and systems integration for his clients' projects something he has been doing for the past 25 years. His approach is simple bring real-world experience to all the courses that he teaches as it brings added value to his students and customers. Redzepagic Jasmin: Jasmin Redzepagic is a professional master in computer engineering, with a sub-specialization in system engineering, but is a person with many hats worn over the years. Having worked in IT as long as he has, he has been a sound technician, SysOps, DevOps, hardware tester, editor-in-chief of a major magazine, writer, IT support lead, and head of IT at a couple of companies. He is currently employed by Algebra University College in Zagreb. This enables him to have a very wide overview of different technologies while still maintaining his focus implementing and teaching the implementation of open source technologies in the field. Right now, his main interest is trying to teach his students and clients to understand the immense expanse of tools available for any conceivable task, with his goal being to get people to understand computers as something that is the most formidable tool we, as humanity, have ever had.

Summary:

Practical and actionable recipes for using shell and command-line scripting on your Linux OS with confidence. Linux Command Line and Shell Scripting Techniques begins by taking you through the basics of the shell and command-line utilities. You'll start by exploring shell commands for file, directory, service, package, and process management. Next, you'll learn about networking - network, firewall and DNS client configuration, ssh, scp, rsync, and vsftpd, as well as some network troubleshooting tools. You'll also focus on using the command line to find and manipulate text content, via commands such as cut, egrep, and sed. As you progress, you'll learn how to use shell scripting. You'll understand the basics - input and output, along with various programming concepts such as loops, variables, arguments, functions, and arrays. Later, you'll learn about shell script interaction and troubleshooting, before covering a wide range of examples of complete shell scripts, varying from network and firewall configuration, through to backup and concepts for creating live environments. This includes examples of performing scripted virtual machine installation and administration, LAMP (Linux, Apache, MySQL, PHP) stack provisioning and bulk user creation for testing environments. By the end of this Linux book, you'll have gained the knowledge and confidence you need to use shell and command-line scripts.

Contents:

Cover

Title Page

Copyright and Credits

Contributors

Table of Contents

Preface

Chapter 1: Basics of Shell and Text Terminal

Technical requirements

Accessing the shell

Getting ready

How to do it…

How it works…

See also

Setting up the user shell

Setting up the Bash shell

There's more…

Using the most common shell commands

How it works...

Using screen

Chapter 2: Using Text Editors

Learning the basics of the Vi(m) Editor

Learning the basics of the nano editor

Going through the advanced Vi(m) settings

Chapter 3: Using Commands and Services for Process Management

Process management tools

Managing background jobs

Managing process priorities

Configuring crond

Chapter 4: Using Shell to Configure and Troubleshoot a Network

Using nmcli and netplan

How to do it

How it works

There's more

Using firewall-cmd and ufw

Working with open ports and connections

Configuring /etc/hosts and DNS resolving.

Getting ready

Using network diagnostic tools

Chapter 5: Using Commands for File, Directory, and Service Management

Basic file and directory-based commands

Additional commands for manipulating file/directory security aspects

Manipulating text files by using commands

Finding files and folders

Archiving and compressing files and folders

Managing services and targets

Chapter 6: Shell-Based Software Management

Using dnf and apt for package management

Using additional repositories, streams, and profiles

Creating custom repositories

Compiling third-party software

Chapter 7: Network-Based File Synchronization

Learning how to use SSH and SCP

Learning how to use rsync

Using vsftpd

Chapter 8: Using the Command Line to Find, Extract, and Manipulate Text Content.

Technical requirements

Using text commands to merge file content

Converting DOS text to Linux text and vice versa

Using cut

Using egrep

Using sed

Chapter 9: An Introduction to Shell Scripting

Writing your first Bash shell script

Serializing basic commands - from simple to complex

Manipulating shell script input, output, and errors

Shell script hygiene

Chapter 10: Using Loops

The for loop

break and continue

The while loop

The test-if loop

The case loop

Logical looping with and, or, and not

Chapter 11: Working with Variables

Using shell variables

Using variables in shell scripting

Quoting in the shell

See also.

Performing operations on variables

Variables via external commands

Chapter 12: Using Arguments and Functions

Using custom functions in shell script code

Passing arguments to a function

Local and global variables

Working with returns from a function

Loading an external function to a shell script

Implementing commonly used procedures via functions

Chapter 13: Using Arrays

Basic array manipulation

Advanced array manipulation

Chapter 14: Interacting with Shell Scripts

Creating text-based interactive scripts

Using expect to automate repetitive tasks based on text output

Using dialog for menu-driven interactive scripts

Chapter 15: Troubleshooting Shell Scripts

Common scripting mistakes

See also…

Simple debugging approach - echoing values during script execution

Using the bash -x and -v options

Using set to debug a part of the script

Chapter 16: Shell Script Examples for Server Management, Network Configuration, and Backups

Creating a file and folder inventory

Checking if you're running as root

Displaying server stats

Finding files by name, ownership, or content type and copying them to a specified directory

Parsing date and time data

Configuring the most common firewall settings interactively

Configuring network settings interactively

Backing up the current directory with shell script arguments and variables

Creating a current backup based on the user input for the backup source and destination

Chapter 17: Shell Script Examples

Implementing a web server service and security settings

Creating users and groups and forcing users to change them on the next login

Creating users and groups from a standardized input file and a random password for each user

Scripted VM installation on KVM

Using a shell script to provision SSH keys

A shell script for VM administration.

Notes:

Description based upon print version of record.

There's more...

Description based on print version record.

ISBN:

9781800204607

1800204604

OCLC:

1306055894