Bash scripting is a powerful tool for automating repetitive tasks, making it a core skill for anyone working with Linux systems. Among the essential techniques is managing variables that increment automatically, especially in loops or iterative processes. In this tutorial, we’ll focus on how to autoincrement variables in Bash scripts, exploring different ways to handle counters, increments, and loops.
Programming & Scripting
How to Run a Shell Script from Bash Script
Running a shell script in Bash is one of the most fundamental and useful skills for anyone working with Linux systems. Shell scripts allow you to automate repetitive tasks, manage system configurations, and create complex workflows in a few lines of code. Whether you’re a beginner or an experienced user, mastering this will save you time and effort. In this article, we will walk through each step to successfully run a shell script in Bash, providing detailed instructions to ensure your understanding.
Automate Dynamic IP Updates for Your Domain with Cloudflare and Bash Script
In a world where static IP addresses are often an added expense, dynamic IP addresses can make managing domains a challenge. If your ISP assigns you a dynamic IP address, keeping your domain updated can be a hassle. This tutorial will walk you through creating a simple yet effective Bash script that uses Cloudflare’s API to update your domain’s DNS record whenever your IP changes. With this script, you can ensure that your domain always points to your current dynamic IP address, even without a static IP.
Bash Scripting Tutorial: How to Write a Bash Script
The Bash shell is one of the most powerful components of a Linux system, as well as one of the most compelling reasons to use Linux. Users can interact with Bash through the command line, and write scripts to automate tasks. Although this may sound intimidating to beginning users, it is not hard to get started with Bash scripting.
Bash sh Command: Learn the difference between Bash vs Shell
The bash sh command is a fundamental element in the world of Linux. Many new users and even some experienced ones often find themselves confused about the difference between bash and sh. While they are both command interpreters used to execute commands on Linux, they each have their unique features and use cases. In this guide, we will explore the intricacies of bash sh command, compare bash vs shell, and dive into examples that illustrate the differences and specific use cases of each.
Bash File Extension – How to name your Bash Script
When working with shell scripts in Linux, understanding the appropriate file extension is crucial for efficient development and maintainability. One commonly asked question by new Linux users is, “What is the file extension of a shell script?” This article will answer that and cover all aspects of the bash file extension. You will also learn the different naming conventions, best practices, and how to make your bash script executable.
Bash IF AND: Using the AND Operator in Bash If Statements
In Bash scripting, conditional statements like “if” allow you to execute code based on a given condition. However, there are often cases where you need to check multiple conditions at once, and this is where the AND operator comes in handy. Understanding how to use the AND operator in Bash can make your scripts more powerful and efficient. This article will discuss how to use the AND operator with if statements in Bash and explore various options available for achieving this.
Try-Catch in Bash: Bash Script Error Handling
Bash scripting is a powerful tool for automating tasks on Linux systems. However, unlike high-level programming languages, Bash doesn’t have built-in try-catch blocks for error handling. Instead, you must implement different strategies to detect and manage errors during script execution. In this article, we will explore five methods for handling errors in Bash scripts, ranging from beginner-friendly to more advanced approaches.
Sed Substitute Command: Basics, Backreferences, and File Editing
Sed stands for “Stream EDitor”: it is a free and open source utility installed by default on all Linux and Unix-based operating systems out there. What it does, is performing text manipulation on files, but it can also be used as part of pipeline and supports the use of regular expressions. In this tutorial, we learn the basics of the sed substitute command.
How to create a hot standby with PostgreSQL
With databases such as PostgreSQL, the need may arise to scale and provide high availability. If the database does not have a backup which can take its place in case of failure, then all of your operations that depend on the database can be affected from just a single point of failure. Even with virtual systems, there may be a time when you can’t add more resources to a single machine to cope with the ever-increasing load.
How to Store All Shell Commands Immediately After Execution into .bash_history File
When working with the Linux command line, the .bash_history file plays a vital role by storing the commands you have executed. By default, the commands are stored only when you exit your terminal session, meaning they might not be saved in real-time. However, it can be beneficial to ensure that all commands are saved to the .bash_history file immediately after execution. This can be particularly useful in environments where you need to keep track of commands for auditing purposes or if you want to ensure no commands are lost if the terminal unexpectedly closes. In this article, we’ll walk you through the steps to achieve this behavior in your bash shell.
How to install the Zed code editor on Linux
Zed is a high-performance, “multiplayer”, free and open source code editor written in Rust and developed in the open on GitHub. It was created by the same authors as the Atom text editor, and although it has IDE features, it is very responsive. In this tutorial, we learn how to install Zed on some of the most used Linux distributions.