• Definition: Bash scripting is a way to automate tasks by writing a series of commands in a text file that the Bash shell can execute. It allows users to perform complex operations and automate repetitive tasks without manual intervention.
• Purpose: The primary purpose of Bash scripting is to simplify and automate command-line tasks. This can include file manipulation, program execution, and managing system processes. It is particularly useful for system administrators and developers who need to perform routine tasks efficiently.
• Execution: A Bash script typically starts with a shebang (`#!/bin/bash`), which tells the system to execute the script using the Bash interpreter. Scripts can be executed directly from the command line, and they can include conditional statements, loops, and functions, making them powerful tools for automation.

• Interactivity: Bash allows users to interact with the system through a command-line interface, making it easy to execute commands and scripts.
• Portability: Bash scripts can run on any system that has the Bash shell installed, making them highly portable across different Unix-like environments.
• Versatility: Bash scripting can be used for a wide range of tasks, from simple file management to complex system administration tasks, making it a versatile tool in a developer's toolkit.In summary, Bash is a powerful scripting language that enables users to automate tasks and manage systems efficiently through command-line scripts. Its widespread adoption in Linux and Unix environments makes it an essential skill for many IT professionals.

1. Open a Text Editor: You can use any text editor like Nano, Vim, or Emacs. For example, to create a new script file named `script.sh`, you can use the command:```bashnano script.sh```
2. Add the Shebang Line: The first line of your script should be the shebang line, which tells the system to use the Bash interpreter to execute the script. It looks like this:```bash#!/bin/bash```
3. Write Your Commands: Below the shebang line, you can add the commands you want the script to execute. For example:```bashecho "Hello, World!"```
4. Save the Script: After writing your commands, save the file and exit the text editor. In Nano, you can do this by pressing `CTRL + X`, then `Y` to confirm saving, and `Enter` to exit.
5. Make the Script Executable: Before running your script, you need to give it execute permissions. You can do this with the following command:```bashchmod +x script.sh```
6. Run the Script: Finally, you can execute your script by typing:```bash./script.sh```This will run the commands in your script, and you should see the output, such as "Hello, World!" printed to the terminal.

Here’s a complete example of a simple Bash script:```bash#!/bin/bashecho "Hello, World!"date```This script will print "Hello, World!" and then display the current date and time when executed.By following these steps, you can easily start writing and executing your own Bash scripts to automate tasks and improve your workflow.