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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to install Git On Mac?
Git is a distributed version control system that allows developers to track changes in their code, collaborate on projects, and maintain a complete history of their development work. With Git, multiple developers can work on the same project simultaneously without interfering with each other's changes. This tutorial will guide you through different methods to install Git on macOS, from using the official installer to command-line package managers. What is Git? Git is a distributed version control system that tracks changes in files and coordinates work among multiple developers. Unlike centralized systems, Git stores the complete project history ...
Read MoreThe Linux join Command
The Linux join command is a powerful text processing utility that merges two sorted files based on a common field. It reads the contents of two files and combines lines that share the same value in a specified field, creating a unified output. This command is particularly useful for database-like operations, combining related data from multiple sources, and creating reports from structured text files. Syntax The basic syntax for the join command is − join [options] file1 file2 Key Options Option Description -t CHAR Specify delimiter ...
Read MoreBest Whiteboard Applications for Your Linux Systems
Whiteboards are essential tools for facilitating brainstorming sessions and collaborating with team members in a digital workspace. With the advent of technology, physical whiteboards are gradually becoming obsolete, as they are being replaced by digital whiteboard applications. If you are using a Linux system, you may be wondering what the best whiteboard applications are. In this article, we will discuss the best whiteboard applications for your Linux systems, along with their features, advantages, and disadvantages. OpenBoard OpenBoard is a free and open-source interactive whiteboard software that is available for Linux systems. It is designed for use in educational ...
Read More5 Best Vi/Vim-Inspired Code Editors for Linux
Vi/Vim-inspired code editors combine the power and efficiency of traditional Vi/Vim with modern graphical interfaces and enhanced features. While Vi and Vim remain popular among developers for their powerful command-line capabilities, many users prefer editors that offer similar functionality with more accessible interfaces and modern conveniences. 1. Neovim Neovim is a modernized fork of Vim designed to be faster, more stable, and extensible. It maintains full compatibility with existing Vim plugins and configurations while introducing significant improvements. Key Features Built-in terminal emulator for executing shell commands without leaving the editor Lua scripting support as an ...
Read MoreWhere can I set environment variables that crontab will use?
Environment variables are typically set in shell configuration files like .bash_profile, .bashrc (Ubuntu), or .zshrc (macOS). However, crontab runs in a minimal environment and doesn't automatically load these shell configuration files, making environment variables unavailable to cron jobs. Understanding the Problem Let's examine a typical shell configuration file with environment variables − immukul@192 dir1 % cat ~/.bash_profile export JAVA_HOME=$(/usr/libexec/java_home) export PATH=$PATH:/usr/local/node/bin export GOROOT=/usr/local/go export GOPATH=/Users/immukul/go_projects These variables work perfectly in a normal terminal session − echo $GOROOT /usr/local/go However, when you create a cron job, these variables ...
Read MoreWhat is a multithreading model in OS?
Multithreading is a technique where a process is divided into multiple smaller tasks called threads. Each thread is a lightweight unit of execution that can run concurrently with other threads within the same process. When multiple threads execute simultaneously within a process, it is called multithreading. Modern operating systems provide multithreading support as an essential capability for efficient resource utilization and improved system performance. Types of Multithreading Models Based on functionality and thread management, multithreading models are categorized into four types − One process, one thread − Single-threaded model One process, multiple threads − Multi-threaded ...
Read MoreDifference between Operating System and Kernel
Both operating system and kernel are types of system software. The basic difference between the two is that an operating system is a system software that acts as the interface between the users and the machine, while a kernel is a part of the operating system that converts user commands into machine language. Understanding the relationship between these two components is crucial for grasping how modern computer systems function and manage resources. What is an Operating System? An Operating System (OS) is system software that manages computer hardware and software resources while providing common services for computer ...
Read MoreHow to solve "Unary operator expected" errors?
The "unary operator expected" error is a common syntax error in Bash scripting that occurs when a conditional expression lacks the required operands. This typically happens when variables are empty or undefined, causing the shell to receive fewer arguments than expected for comparison operations. What Causes the Error? The error occurs when Bash encounters a comparison operator with missing or empty operands. Let's examine a script that demonstrates this issue − #!/bin/bash read -p "Enter the input: " num1 if [ $num1 -eq 1 ] then echo "Number entered is 1" else ...
Read MoreCheck if a String Contains a Substring in Linux
Working with strings in Linux can be a bit tricky, but with the right tools it can be a piece of cake. A common task many Linux users have to perform is to check if a string contains a specific substring. This can be done using a variety of methods, including regular expressions, string manipulation commands, and programming languages like Python or Perl. However, in this article, we will explore one of the most popular and efficient methods to check if a string contains a substring in Linux, that is by using the special shell variable IFS (Internal Field Separator). ...
Read MoreUsing Shebang #! in Linux Scripts
On Linux, a shebang (#!) is a special line at the beginning of a script that tells the operating system which interpreter to use when executing the script. This line, also known as a hashbang, shabang or sharp-exclamation, starts with #! followed by the path to the interpreter. The shebang line allows you to run scripts written in any language directly from the command line. Understanding Shebang The shebang (#!) symbol indicates which interpreter, or which version of an interpreter, to use when running a script. The name is believed to have originated as a contraction of SHarp ...
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