Author: Rahul

I, Rahul Kumar am the founder and chief editor of TecAdmin.net. I am a Red Hat Certified Engineer (RHCE) and working as an IT professional since 2009..

The latest Debian-based systems have deprecated the use of the apt-key command. This command is used to import the GPG signing keys to systems. This command was working fine till Debian 10 and its derivatives. After the release of Debian 11 (and its derivatives like Ubuntu 22.04), the users start getting a warning message on the screen during the keys import. You will see the warning message “Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8))”. As this is a warning message you can still use the apt-key command but the newer version of Debian and Ubuntu…

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Google Chrome is one of the most widely used web browsers today, with over 1 billion users across the world. While it is available for Windows and macOS – as well as Linux – natively, it can also be installed on OS X using third-party utilities. Installing Google Chrome directly from the official website will only get you so far. Instead, to get the most out of it on a Mac, you need to install it directly from its standalone installer file. Installing Google Chrome on your Mac is not very difficult either. There are several ways in which you…

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Have you been searching for answers about how to install Minecraft on Ubuntu? You’ve come to the right place! This article will tackle everything you need to know about installing Minecraft on Ubuntu. If you are reading this, chances are that you have already fallen in love with Minecraft and want to continue playing it on your Ubuntu machine. However, the installation process isn’t as simple as it is on other platforms such as Windows or Mac OS. If you’re reading this article, then we assume that you have already tried to install the game from its website (if not,…

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Many of the applications required weekly cron jobs to perform a few tasks. For example, perform weekly maintenance, cleanup disk spaces, cleanup mailing list, and other tasks. You may run your weekly tasks on any day of the week. CPU and memory consumption is required for jobs that require a CPU and memory. Those jobs are best to run on a weekend day. Scheduling a Cronjob for Sunday. The day of the week is determined by the fifth section of the cron timer. You can specify a day by using numbers such as 0-7, where 0 and 7 both correspond…

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We’ll learn about how to execute several commands simultaneously in Linux in this article. Every operator has its own advantages when it comes to separating commands. This tutorial will help a little bit in improving how we execute commands and author shell scripts. The Linux operating system offers a simple command line interface for managing the system. There are shells such as Bash, CSH, and Zsh that accept commands from the user and route them to the kernel. A command is used to perform some function on the system. We may also specify multiple shells at once and execute them…

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An access modifier is a special kind of variable declaration that controls how and where other code can use the declared class, variable, or method. This blog will explain what access modifiers are and the three different levels of visibility for classes, methods, and variables with some practical examples. Understanding the scope of your code is essential for writing readable and maintainable programs. Access modifiers are one way to achieve this goal. They tell other users of your code how you want them to interact with specific methods or variables. If you’re new to Java programming, these concepts may seem…

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Have you heard about the new and trending JavaScript library called React.js? It’s so cool that it has been extensively used by developers to create interactive User Interfaces and components in their applications. The React library is also a great choice when you want to build fast and scalable apps with a component-based approach. If you haven’t started using it yet, it’s time you start learning. In this blog post, we will show you how to set up a React development environment on your Mac computer. Read on! Pre-Requisites First, you need to make sure that you have the latest…

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Bash is an acronym of Bourne-Again Shell, which is the successor of Bourne Shell distributed with most of the Linux and GNU operating systems. It comes with multiple advanced features from the previous version. The PATH is an environment variable that stores the directories path containing the executable files. How to Set PATH Variable? Whenever you need to add a new executable in the PATH variable, you can either add it to the start of another directory or at the end of other directories. The system checks for any executable under directories set in PATH from start to end. If…

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Many companies use the Python programming language for data science applications, machine learning models, and other types of analytical tasks. Since Python is often only used for specific projects, many businesses have to integrate it into their workflow programmatically. This means they need a way to automate the process so it runs independently when needed and on a schedule. Fortunately, there are ways to integrate Python with cron jobs to automate execution as frequently as necessary. In this article, you will learn how to schedule Python using cron and some useful examples of when and how you might use these…

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Some of the tasks are required to run twice per day. You can use */12 in hours section to schedule a job to run at 12AM and 12PM daily. Sometimes you need to run crontab at different hours or minutes. In that case, you can define the hours like 09,17 etc. For example: 0 */12 * * * script.sh The above script will run at 12 AM (00:00:00) and 12 PM (12:00:00) every day. As you can see that using */12 executes cron exactly at 12AM and 12PM. But, sometimes you may need to run crontab at different times like…

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