FUNDAMENTALS A Complete Guide for Beginners
Bash scripting allows you to enter the world of automation and efficiency, enabling you to streamline tasks and take control of your workflow. This article provides a concise guide to begin your journey into writing bash scripts. From grasping the basic to practical examples and best practices, you will gain the knowledge and confidence to tap into the true potential of Bash. In this article, I will show, how will you start writing bash scripts. Let’s dive in and unlock the power of automation with bash scripting.
What is a Bash Script?
A Bash script is a simple text file containing a series of commands that can be executed by the Bash shell. Bourne Again Shell (Bash) is a widely used shell on Unix-like operating systems. All of those commands can be included in a Bash script file that you can run from the terminal. You can organize any series of commands into a Bash script in a text file with a .sh extension, then it will execute in that order. The shell executes the commands in the scripts sequentially.
In a Bash script, you can include a variety of commands, such as system commands, shell built-in commands, and external programs. You can also use control structures like loops and conditional to control the flow of execution, as well as variables to store and manipulate data. Additionally, Bash scripts support functions, input/output redirection, error handling, and more, making them versatile for various scripting needs.
Start Writing: Text Editor for Scripting
To write a Bash script, you must first select a text editor. Then write your intended code utilizing proper syntax on the text editor. There are plenty of text editors for writing bash scripts.
Some available text editors for Bash script writing are:
- Nano: It is a user-friendly text editor that offers many other extra features like word searching, replacing, jumping to a line or column, filename tab completion, auto-indentation, etc.
- Vim: Vim is an open-source, fast, and powerful text editor for the Linux operating system.
- GNU Emacs: GNU Emacs is a text editor that features efficient commands for common but complex actions and for plugins and configuration hacks.
However, from all of them, the Nano text editor is one of the most efficient text editors for bash scripting.
Naming Convention of Bash Scripts
Some naming conventions of Bash scripts are listed below:
- It is case-dependent. The script.sh and SCRIPT.sh are two different bash scripts.
- You can use numbers along with letters in the bash naming. The bash1.sh and script4.sh are examples of bash.
- You can use underscore (_) in bash naming. The sdg_script.sh, and lin_simp.sh are two examples of Bash script names.
Components of Bash Script
A Bash script’s components include shebang and commands you want to execute. Shebang interprets that it is a bash script. The below image shows the basic structure of a Bash script.
These components can be combined in various ways to create powerful and flexible Bash scripts for automating tasks.
Conclusion
In summary, a Bash script is a file containing commands written in the Bash programming language. It allows users to automate tasks, customize their computing environments, and increase productivity in Linux and Unix-based systems. With its flexibility and versatility, Bash scripting is a powerful tool for system administration, software installation, and automation. I hope, by reading this article, you have learned how will you start writing bash scripts.
People Also Ask
What are Bash scripts used for?
Bash scripts are used for various purposes and are particularly valuable in automating tasks, managing system configurations, and streamlining repetitive processes. Scripts may include several commands, such as loops, functions, conditional constructs, etc. to perform these actions.
How do I write a bash script?
To write a bash script:
- First, create a .sh file using a Nano text editor (or any other editor). For example,
nano script.sh. - Then, Nano will open your blank script.
- Start writing inside the script with
#! /bin/bashas a first line & then write some other code. - Save the script & exit the Nano editor.
- Finally, to execute the script type
bash script.sh.
Why is it called Bash script?
The name Bash is an acronym of ‘Bourne-again SHell’. Bash is a superset of the earlier shell, and is generally compatible with Bourne shell programs.
Is Bash script a programming language?
Yes, Bash is a widely used programming language. This is perfectly designed for use on the command line and in shell scripts.
Is Bash scripting a skill?
Yes, Bash scripting is an important skill for any developer, system administrator, or power user who wants to automate repetitive tasks and make their workflow more efficient.
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- An Ultimate Guide to Bin Bash Script and Shebang
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- 8 Practical Examples of Chaining Commands in Bash Scripts
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