Author: Rahul

Iostat is a valuable Linux command-line utility that provides detailed information about your system’s CPU and disk I/O performance. It is part of the sysstat package and offers real-time insights into the utilization of your system’s resources, allowing you to identify bottlenecks and optimize performance. In this article, we will cover the basics of iostat, explore its various options, and provide practical examples to help you get started. What is iostat? Iostat (Input/Output Statistics) is a Linux command-line utility that collects and displays statistics about the CPU and disk I/O performance. It provides valuable insights into the efficiency and usage…

In the world of Linux system administration, monitoring and understanding the performance of your system is crucial for ensuring its smooth operation. One such essential monitoring tool is ‘vmstat’ – a versatile command-line utility that provides insightful statistics about a Linux system’s memory, processes, IO, and CPU usage. In this article, we will delve into the usage and various options of the vmstat command, explore practical examples, and learn how to interpret the output to diagnose potential performance issues. What is vmstat? Virtual Memory Statistics (vmstat) is a Unix/Linux utility that collects and displays information about the system’s memory, CPU,…

MySQL replication is a popular method for synchronizing data between a master and one or more slave servers. It ensures high availability, load balancing, and data redundancy. However, there are situations where you might need to disable replication on a slave server temporarily, such as during maintenance or troubleshooting. This article will cover best practices and considerations for safely disabling MySQL replication on slave servers. Step 1: Plan and Communicate Downtime Before disabling replication, inform your team members and schedule a maintenance window if necessary. This way, you can minimize the impact on users and avoid unexpected disruptions. Ensure that…

Bash, or the Bourne Again SHell, is a popular Unix shell used for scripting and automating tasks in Linux, macOS, and other Unix-like systems. One common task in Bash scripting is checking whether a file does not exist. This can be useful for tasks such as creating new files only if they do not already exist, skipping over existing files during a file transfer, or triggering specific actions based on file presence. In this article, we will explore different ways to check if a file does not exist in Bash. Method 1: Using the ‘test’ command The ‘test’ command in…

Assuming that you work in a bakery with a few team members, everyone has their own tasks, like making bread, decorating cakes, or preparing pastries. In the world of coding, particularly when using Git, a version control system, this is similar to each person working on their own part of the project in separate branches. Just as each baker has their own station but needs to coordinate with others, developers use branches to work independently yet stay aligned with the team’s goals. This tutorial will help you to clone all remote branches in a Git repository, using simple and a…

Redis is an in-memory data structure store, widely used as a database, cache, and message broker. It is particularly useful for managing PHP sessions due to its high performance, low latency, and data persistence capabilities. In this article, we will guide you through the entire process of installing, configuring, and using Redis as a session store for PHP applications. Installing Redis on Your System First, you need to install Redis on your Linux distribution. The installation process varies depending on the package manager used by your distribution. Here are some examples: For Debian-based systems (e.g., Ubuntu), use the apt package…

JQ is a versatile command-line JSON processor for Linux that allows developers to parse, filter, and transform JSON data quickly and efficiently. Its powerful features make it an indispensable tool for anyone working with JSON files on Linux systems. In this article, we’ll cover the top 10 essential JQ commands that every Linux developer should know to streamline their JSON processing tasks. Example JSON File Content For this tutorial, you can use the following example JSON data in a file named input.json. This JSON data represents an array of people with their respective names, ages, countries, and addresses:

Save…

JQ is a powerful and flexible command-line JSON processor for Linux, designed to parse, filter, and transform JSON data. Its lightweight nature and speed make it an essential tool for developers working with JSON files. In this article, we will explore how to use the JQ command-line tool to pretty print JSON files in Linux, improving readability and enhancing the debugging process. 1. Installing JQ on Your System Before you can use JQ to pretty print JSON files, you need to install it on your Linux distribution. The installation process varies depending on the package manager used by your distribution.…

DNS (Domain Name System) is a critical component of the internet that translates human-readable domain names into IP addresses that computers can understand. When DNS issues arise, it can be challenging to diagnose the problem. This is where the Dig command-line tool comes in handy. Dig is a powerful DNS troubleshooting tool that allows users to query DNS servers and retrieve information about domain names, IP addresses, and other DNS records. In this article, we will explore 15 examples of using Dig for DNS troubleshooting. Section 1: Basic Dig Commands In this section, we will explore some basic Dig commands…

Git is an essential tool for developers, enabling efficient code versioning, management, and collaboration. One of the key aspects of working with Git is sharing local branches with remote repositories, allowing multiple team members to contribute to the same project. In this article, we will provide a comprehensive guide to pushing new local branches to remote Git repositories, making collaboration more effective and streamlined. Step 1: Create a New Local Branch Before you can push a new local branch to a remote repository, you must first create the branch. To do this, use the git checkout command with the -b…