Found 9 Articles for Bash

Introduction The Bash shell is one of most widely used shells in Unix/Linux environment. One of its most useful commands is wait command. In this article, we will explore Bash wait command and its usage with examples. What is Bash wait Command? The wait command is a built-in Bash shell command that waits for termination of a background process. This means that Bash shell will pause execution until specified process has completed. Usage of Bash wait Command The basic syntax of wait command is as follows − wait [n] Here, 'n' is process ID of background process that we ... Read More

Bash is a powerful shell used in Linux systems for executing commands and managing processes. trap command in Bash is a useful tool for handling signals and errors that can occur during script execution. In this article, we'll explain what Bash trap command is, how it works, and give some examples of how you can use it. What is Bash Trap Command? The Bash trap command is a mechanism that allows you to handle signals and errors that can occur during script execution. Signals are software interrupts that are sent to a process to notify it of an event, such ... Read More

When it comes to programming in Bash, string comparison is a fundamental concept that every developer needs to be familiar with. Bash string comparison involves comparing two strings and evaluating whether they are equal, not equal, greater than, or less than each other. Understanding how to compare strings in Bash is essential for writing reliable and robust scripts. In this article, we'll explore basics of Bash string comparison and provide examples to help you understand concept better. We'll start with an introduction to comparison operators and then move on to different types of string comparison techniques. Comparison Operators Bash provides ... Read More

If you've spent any time using Bash, you've probably noticed that there are two types of quotes you can use when defining variables or passing arguments to commands: single quotes (' ') and double quotes (" "). At first glance, these quotes might seem interchangeable, but there are actually some key differences between them that can impact behavior of your Bash commands. In this article, we'll explore those differences and explain when you should use single quotes, when you should use double quotes, and what happens when you mix them up. Defining Single and Double Quotes Before we dive into ... Read More

If you're a Linux or Unix user, chances are you've used Bash at least once or twice. Bash is a command-line shell that lets you interact with your operating system in a more direct and powerful way than using a graphical user interface. One of most powerful features of Bash is for loop, which lets you automate repetitive tasks by iterating over a list of values. In this article, we'll explore how Bash for loop works and provide some examples of how you can use it in your own scripts. What is a For Loop? A for loop is a ... Read More

Printing variables in Bash is a common task when working with shell scripts. Bash printf command is a powerful tool that allows you to print variables with precision and formatting options. In this article, we will explore how to use Bash printf to print variables in various ways. What is Bash Printf? Bash printf is a command-line utility that is used to format and print text on terminal. It is a built-in command in Bash, which means that it is available in every Bash shell session without need for any external dependencies. The printf command is similar to echo command, ... Read More

Introduction In general, there are many ways to pass input to programming or scripting languages and sometimes there is a need to pass input from the command line instead of input from the code. Like any other programming or scripting language bash scripting also support the command-line argument. In this article, we will try to explore the syntax for command-line arguments and then we will see some examples for command-line arguments and discuss the special variables. Command-line Argument Syntax We already know how to run a bash script in Linux. We can use either bash or sh command and then ... Read More

Introduction Function is a section in the code where group of instructions are kept in one place. Like all other programming or scripting languages, we can use function in bash in Linux. There are many advantages using function than without using function. Some benefits are like, it is easy to read or execute the code and functions can be reused in code whenever needed. Though there are some limitations in bash function, still it is good to use function for bash scripting if there is a need. There are two ways a bash function can be defined Define ... Read More

Before getting into the ways of creating a file using Bash, let's first understand how Linux treats its files. Linux organizes all its data into files and files are organized into directories. Further, the directories are organized into tree-like structures called the file system. When you have to work in a Linux environment, you would definitely have to spend a lot of your time working on different types of files.There are various ways in which one can create a file in Linux. You can create a file from the Bash Shell or you can use the Desktop File Manager to ... Read More