Bash Shell Scripting Online Course

Bash Shell Scripting Online Course

This course provides a comprehensive guide to Bash shell scripting for Unix/Linux environments, teaching you how to automate tasks and interact efficiently with the operating system. You’ll start with the basics of shell scripting, including environment setup, variables, conditional statements, loops, and functions. The course also covers essential Unix tools such as grep, awk, and sed for data manipulation, along with working on remote servers and interacting with REST APIs. Through practical projects and real-world examples, you will gain hands-on experience in automating repetitive tasks, managing system configurations, and enhancing productivity. By the end of the course, you will be proficient in creating robust Bash scripts to streamline workflows and optimize Unix/Linux system administration.

Who should take this Course?

The Bash Shell Scripting Online Course is ideal for system administrators, DevOps engineers, and IT professionals who want to automate tasks, manage servers, and streamline workflows using Bash scripting. It is also suitable for students, beginner programmers, and technology enthusiasts seeking hands-on experience in writing scripts to enhance productivity and efficiently handle Linux/Unix environments.

What you will learn

• Write and execute Bash shell scripts in Unix/Linux environments
• Utilize filters such as grep, awk, and sed for data manipulation
• Apply conditional statements, loops, and functions for decision-making
• Interact with remote servers and REST APIs
• Use regular expressions for text pattern matching
• Practical projects enhance Linux/Unix administration and DevOps skills

Course Outline 

Introduction

• Introduction
• Prerequisites to the Course
• Who Can Enroll in This Course?

Environment Setup to Practice with Bash Shell Scripting

• Environment Setup to Practice with Bash Shell Scripting
• Installing Any Linux Distribution And CentOS on Windows with WSL
• Enabling systemctl on WSL CentOS
• Configuring Gmail Setup on CentOS
• Accessing Windows Files from WSL Centos or WSL CentOS Files from Windows
• Basic Steps to Write and Execute a Bash Shell Script
• Different Ways to Execute a Shell Script
• How to Use CentOS Terminal on Visual Studio Code Editor
• chmod Command Won't Work by Default on WSL Linux
• Install Tools Such as Docker, Ansible, Java, nginx, and httpd with a Bash Script

Basic Understanding of Bash Shell Scripting

• Basic Understanding of Shell Script Execution
• Usage of Semicolon; in Bash Shell Scripts

Variables

• Introduction to Variable: What Is Variable and Define Variables with Differences
• Default Value of a Variable and How to Unset or Clear or Delete Variable Values
• Types of Variables
• Rules to Define Variables
• What Is a Syntax in Bash Shell Scripting

Inputs and Outputs

• Inputs and Outputs for Variables in Bash Shell Scripting
• Echo Command and Basic Usage of the Echo Command
• Practice with Variables and Echo Command
• Link Windows Path to Non-Root User Home of WSL OS
• Echo Command with Options Part-2
• How to Get the Colorful Output from Bash Shell Scripts
• Read Command
• Source Command to Read Inputs for Variables
• Export Command to Provide Inputs for Variables
• Command-Line Arguments to Provide Inputs for Variables of Bash Shell Script
• Shift Command with Command-Line Arguments

String Operations

• Basic Operations on String
• String Operations on Paths

Arrays

• Introduction to Arrays
• Accessing Array Elements and Operations on Arrays
• Why We Need Arrays
• How to Provide Inputs for Arrays

Bash Dictionaries | Bash Associative Arrays

• Introduction to Bash Dictionaries

Basics of Commands

• Exit Status of a Command
• Redirection Operators and STDIN, STDOUT, and STDERR
• How to Execute Any Command with the Help of a Variable?
• How to Use the Cut Command to Get Required Columns/Fields and Characters
• How to Use an awk Command to Get the Required Filed/Column or Line
• Basics of grep Command
• How to Use Variables in grep Command?
• Introduction to sed Command and Usage of Variables
• sed Command with Find and Replace | How to Use Different Delimiters in sed
• sed Command with Inserting and Deletion of Lines Using Line Numbers and Search
• Best Example to Use the tr Command with Cut and Then with kill-9
• Arithmetic Operations for Integers and Floating Point Numbers

Working with Command-Chaining Operators

• List of Command-Chaining Operators
• Command-Chaining Operator - Pipe
• Command-Chaining Operator - Semicolon
• Command-Chaining Operators - Logical AND and OR
• How to Find the Location or Path of Any Command or Installed Package
• Shell Script to Get the Location of Any Package
• Executing the Block of Code
• Simple Practice
• How to Get the Latest File or Directory from the Current Location

Test Command and Conditional Statements

• How to Use the Test Command to Validate a Condition
• Exit Command and Its Usage
• Introduction to If and If-Else Statements
• Debugging a Bash Shell Script

Shell Scripting Practice

• Write a Shell Script to Read a Given File Content
• Write a Shell Script to Install Packages Using Yum

The if, elif, elif else, and Case Statements

• The if, elif, and elif else Statements
• Case Statement
• Write a Shell Script to Find the Version for a Given Tool
• Shell Script to Send All DevOps Tools Information to Mail

Scheduling Jobs

• Scheduling Jobs with at Command
• Scheduling Jobs with crontab

Comments and Logging

• Comments and Logging

Functions

• Introduction to Functions
• Defining a Function and Calling It with and Without Arguments
• How to Pass Strings or Text as an Argument
• Shell Script to Install Packages with Functions
• Scope of Variables
• How to Reuse Function in Different Shell Scripts

Here Document and Here String

• Heredoc and Herestr

Loops

• Introduction to Bash Loops with an Example
• For Loop Syntax and Its Usage
• Working with Arrays Using For Loop
• Simple Practice with For Loops
• Send an Automatic Mail Alert When the Secret File Is Deleted
• Break and Continue Statements
• While Loop Part-1
• While Loop Part-2
• Until Loop with Example
• Select Loop and Its Usage with an Example
• Practice for You
• While Loop with getopts Command to Read Arguments

Working with REST APIs Using the Curl Command

• How to Validate the REST API Execution with the Curl Command?

Working with Remote Servers

• Introduction to Work with Remote Servers
• Shell Script to Execute a Command on Remote Hosts Using When They Used SSH Keys
• How to Provide Password for ssh with sshpass? | There Are Three Ways
• Working with SCP to Transfer a File from the Local Server to the Remote Server
• How to Provide a Password for ssh or scp Using Expect Command?

Real-Time Practice

• Monitor a Service(s) on the Host for Every Minute; If Not Running Then Send a Mail
• Shell Script to Monitor a Microservice with Its Health URL
• Monitor Application Log Directory | Alert If the Application Is Not Generating Logs
• Install the Required Git Version on the Host

Regular Expressions | Regex

• Introduction to Regular Expressions or Regex
• Creation of Pattern or Extended Regular Expressions or ERE
• Write a Shell Script to Get the Latest Git Version from the git-scm Website
• Case Statement with Regex

printf Command

• Concepts of printf Command