Bash is a shell language used in Linux systems that allows users to interact with system through command-line interface. Bash offers several string manipulation capabilities that can help users manipulate and process text strings. In this article, we will explore various techniques available for string manipulation in Bash. Basic String Operations Bash provides basic operations for manipulating strings. To create a string variable in Bash, you simply assign a value to a variable name − mystring="Hello, world!" To display contents of string variable, you can use echo command − echo $mystring The output will be − Hello, world! ... Read More

As a Linux user, it is common to come across situations where you need to reverse order of lines in a file. This could be necessary when you want to read a file in a reverse order or when you want to perform certain operations that require content of a file to be in reverse order. In this article, we will explore how to reverse order of lines in a file in Linux. Introduction to Linux Commands for Reversing Order of Lines in a File Linux provides several commands that can be used to reverse order of lines in a ... Read More

Introduction Text files are widely used for storing data and information in various fields such as computer science, engineering, healthcare, finance, etc. However, sometimes it is necessary to remove certain lines that contain specific strings or patterns from a text file. This task can be accomplished easily using various programming languages such as Python, Perl, Bash, etc. In this article, we will focus on how to delete lines in a text file that contain a specific string. Prerequisites Before proceeding further, we need to make sure that we have following prerequisites − A text file containing data and information. ... Read More

In Linux, it is often useful to randomize lines of a file. This can be helpful when working with large datasets or when performing certain operations that require lines of a file to be in a random order. In this article, we will discuss different ways to randomize lines in a file in Linux. Using 'shuf' command The 'shuf' command is a Linux utility that can be used to randomly shuffle lines in a file. To use 'shuf' command, you need to have it installed on your system. Most Linux distributions come with 'shuf' pre-installed, but if it is not ... Read More

Introduction Bash is a popular command-line shell used in Linux and other Unix-based operating systems. One of powerful features of Bash is its support for arrays. An array is a collection of values that can be accessed using an index. In this article, we will discuss basics of Bash arrays and how they can be used in Linux. What is a Bash Array? A Bash array is a variable that can hold multiple values. values are stored in consecutive memory locations and can be accessed using an index. index of first element in array is 0, and index of last ... Read More

As a Linux user, you must have come across time command. It is a simple yet powerful command that allows you to measure execution time of a process. Whether you are a developer, system administrator, or just a curious user, understanding how time command works is essential for optimizing your workflow and identifying bottlenecks in your system. In this article, we will dive deep into time command in Linux and explore its various use cases. What is time command? The time command is a Linux utility that measures time it takes for a given command to execute. command accepts a ... Read More

Introduction Linux command-line interface is one of most powerful tools available to system administrators and developers for managing and working with their systems. One of challenges with CLI is that it requires memorizing many commands and options. However, there are tools that make it easier to navigate command line, such as fzf command. In this article, we will introduce fzf command, how it works, and its features. What is fzf? fzf is a command-line fuzzy finder, which allows you to easily search through files, directories, and other types of data. It is a highly customizable tool that can be used ... Read More

Introduction The Linux source command is an essential tool for Linux users and administrators. It is used to execute a script file in current shell environment, and it allows you to modify current shell environment in same way that you would if you had typed commands manually. In this article, we will explore Linux source command and its various applications. What is Linux source command? The Linux source command is a shell command that reads and executes commands from a file in current shell environment. file is typically a shell script, but it can also be any text file containing ... Read More

Process memory management is a crucial aspect of any operating system. In Linux, memory management system is designed to efficiently manage memory usage, allowing processes to access and use memory they require while preventing them from accessing memory they do not own. In this article, we will discuss process memory management in Linux in detail, covering various aspects such as memory allocation, virtual memory, memory mapping, and more. Memory Allocation Memory allocation is process of assigning memory to a process or program. In Linux, kernel provides two main methods for memory allocation: static and dynamic. Static Memory Allocation Static memory ... Read More

Introduction Linux is an open-source operating system that is widely used in industry. One of most notable features of Linux is its command-line interface (CLI), which provides a lot of flexibility and power to users. When working in command line, it is common to run multiple commands concurrently. However, sometimes, you may want to control how these commands are executed and how they interact with each other. This is where job control comes in. Job Control Job control refers to ability to manage and manipulate running processes in a Linux system. It allows users to start, stop, pause, resume, and ... Read More