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Bash or Bourne Again Shell is one of Linux’s most essential features. It is an interpreter of shell commands that you can use to automate tasks and perform various actions. In other words, you can add any Linux command in the script and create a combination of multiple commands to automate the tasks from the terminal. Although bash scripts don’t need any particular extension to function, they usually have the .sh extension. Many Linux users need clarification about the proper file extension for a bash script. So, this blog provides deeper insight into the right extensions for a bash script. Scripts With No Extension Many Linux users prefer to use the shebang (#!/bin/bash) rather than using any extension with the script. For example, let’s create a script to greet a user using the script, so first create a file using the touch command: touch greeting Now, open it with the text editor and add the shebang line with the commands: #!/bin/bash echo "Hello $USER" echo "How are you?" Once you are done, provide the executable permission to the script: chmod u+x greeting Finally, run the script, and the system will print the information: ./greeting Bash Extensions (.sh and .bash) .sh is the universal extension for any shell, including bash, csh, tsch, etc. It does not specify which shell you are currently using for your script. On the other hand, .bash is specifically used for the bash shell and instructs the system to run the script in the bash environment. If you are working on bash, use the .bash extension rather than .sh, as .bash ensures that it must be run in bash. Moreover, .sh provides portability for different shells, avoiding the features restricted to specific shells and working on POSIX-compliant shells. What is Proper File Extension for a Bash Script? There are multiple conditions under which you can use different script extensions. For example, use the shebang if you want to go simple with no extension. However, if you want to use the bash-specific feature, please use the .bash extension and .sh when you are unsure about the shell you are using. Moreover, you can use the .sh extension if you are a beginner and want to start learning the different shell scripting. Wrapping Up This was all about the most accurate explanation of a proper file extension for a bash script. We have explained three different extension approaches you can use while working on bash scripting. If you are new to shell scripting, please use .sh scripting and .bash to work around the bash environment. View the full article

In the dynamic world of DevOps and system administration, command-line proficiency is a crucial skill. Bash, one of the most widely used command-line shells - and the default for most Unix-based systems, including popular Linux distributions - offers immense power and versatility. Mastering Bash scripting can give you a competitive edge in the automation-reliant field of DevOps. This blog post, based on the Advanced Bash Scripting course offered by KodeKloud, serves as a comprehensive guide to mastering Bash scripting. Understanding Bash ScriptingBash scripts are essentially command-line programs written in the Bash shell language. They are used to automate tasks and execute commands in a series. Bash scripts simplify complex tasks and are often used in system administration and programming. The scripts are executed in a terminal window, and they can be created using any text editor. Why Advanced Bash Scripting?With bash scripting, you can write scripts that can perform complex operations, manipulate data, and interact with the system. It is a versatile language that can be used on almost any platform, making it an excellent choice for system administrators and developers. Learning bash scripting is an investment in your future, as it can help you work more efficiently and effectively. The KodeKloud CourseKodeKloud offers a comprehensive course on Advanced Bash Scripting, designed to equip learners with the knowledge and skills to effectively utilize Bash. The course covers Bash scripting conventions and best practices, working with variables, functions, and parameter expansions, understanding streams, and managing input/output redirection, among other topics. The course is tailored for visual learners seeking an engaging and up-to-date learning experience. It balances theory and practice perfectly to ensure learners easily grasp Bash’s intricate concepts. From a theory perspective, the course explores widely discussed concepts like using curly braces for variable expansion, file descriptors, and what POSIX compliance means, along with its implications for syntax choice. From the practical perspective, it includes guides for modern Bash features, including associative arrays using key-value pairs for accessing array elements, introductory tutorials for popular command-line utilities like awk and sed, and Labs for practicing each learned concept to complement the learning experience. By mastering the concepts covered in this course, you will enhance your Bash proficiency and gain the confidence to write superior and more robust scripts. You'll understand how to create, read and debug scripts. Additionally, you’ll master how to implement script logging and error handling. Enroll in the Advance Bash Scripting Course! The Power of Bash ScriptingBash scripts can help automate a wide range of tasks and manage system configurations, making your work more efficient and reliable. By taking the KodeKloud course, you will develop practical skills in Bash scripting, including writing robust scripts that follow best practices. You will also learn how to manage input/output redirection, work with variables and functions, and use parameter expansions. These valuable skills will enable you to effectively use Bash scripting in your own work. Advanced Bash Scripting ConceptsIn addition to learning practical skills in Bash scripting, the KodeKloud course covers advanced concepts that allow users to leverage the full power of Bash. These concepts include associative arrays that use key-value pairs to access array elements as well as introductory tutorials for popular command-line utilities like awk and sed. With this knowledge, users can perform complex text-processing tasks using Bash scripts. Career Opportunities with Bash Scripting MasteryBy mastering Bash scripting, you will be well-positioned to pursue career opportunities in software development, IT management, and DevOps engineering. It will open up unparalleled career opportunities, allowing you to prosper in the system administration and DevOps fields. Whether you're automating deployments, managing system configurations, or writing complex data analysis scripts, mastery of Bash scripting will be a valuable asset. Enroll Now! ConclusionIn conclusion, Bash scripting is a powerful tool that every DevOps professional and system administrator should master. The KodeKloud Advanced Bash Scripting course provides a comprehensive guide to mastering its application, covering everything from the basics to advanced concepts. So, are you ready to enhance your DevOps or SysAdmin skills and gain command-line mastery? Enroll in the KodeKloud course today and unlock the power of Advanced Bash Scripting! Here's to your DevOps journey! New to Linux and Scripting? Start with our beginner courses: Linux Basics CourseShell Scripts for BeginnersWant to certify your Linux skills? Check out our certification exam preparation courses: Linux Foundation Certified System Administrator (LFCS)Linux Professional Institute LPIC-1 Exam 101Red Hat Certified System Administrator(RHCSA) SUBSCRIBE to gain access to this comprehensive course as well as 65+ additional courses on Linux, DevOps, AWS, Azure, GCP, Kubernetes, Docker, Ansible, Terraform, Python, and more. Join us on this transformative educational adventure and unlock the power of the bash scripts. View the full article

Use Case: You need to run a custom shell script in your Docker container with arguments passed to the script. These arguments decide how the script runs inside the container. We will look into running custom shell scripts inside a Docker container with command line arguments in this guide... View the full article