Author: Rahul

Crontab is a utility for running scheduled tasks at regular intervals on Unix-Linux systems. It allows us to schedule multiple cron jobs to run at once. We can schedule any shell command or script to can be executed on the terminal. Every scheduled job in crontab is separated by a new line. We can also define multiple commands or scripts in a single cron job to run one by one. How to Sepreate Two Commands in Linux You can separate two or more commands by using semicolons (;), logical AND (&&), or logical OR (||) operators. Which of these operators…

The “Connection Refused” error means that the computer is not accepting connection requests to the requested IP address and port. Connection requests may be blocked by a firewall, which is why “Connection refused” is displayed. When a computer receives a connection request from an IP address and port that it wants to connect to, but the firewall blocks the connection, the “Connection Refused” error message appears. “Connection refused” can be due to a firewall blocking connection requests. In some cases, none of the services are listening on the requested port also causes the “Connection Refused” error. The Problem: Today, I…

Cron jobs (or cron jobs) are schedules that tell the computer to run a program or execute a command automatically at a specified time. This is called a cron job, a daemon that runs in the background and performs tasks on a schedule. Cron is a process that runs in the background and periodically executes programs or tasks. By design, cron is extremely flexible, allowing users to run tasks as often as once a minute or as infrequently as once every 99 weeks. Cron jobs are a common way to automate daily tasks, like sending out marketing emails, running reports,…

Capturing screenshots on a Mac is a valuable skill, especially when you need to document moments from videos, save game visuals for online forums, or provide visual evidence while offering tech support. Mac computers offer several efficient methods for taking high-quality screenshots, equipped with user-friendly built-in screenshot tools. Screenshots are not only essential for tech support and software testing but also for creating visual guides and digital content. This step-by-step guide will teach you how to effortlessly take screenshots on your Mac, enabling you to capture images quickly and efficiently whenever needed. Option 1: Full Screen Screenshot on Mac Utilize…

Google Chrome is one of the most widely used web browsers in the world. Unfortunately, that also means that a lot of users will see broken links on your website if you don’t take precautions to prevent it. Re directing or ‘Redirecting’ an old URL to a new one is one such precaution you can take. There are two redirect types: Permanent Redirect: A 301 Redirect is a permanent redirection. When a user types in a URL and gets redirected to another page, the new page comes up with a fresh title and description in the search engine results. The…

JAVA_HOME is an environment variable used by various Java-based applications to locate JVM (JDK) on any system. Similarly, Maven also required the JAVA_HOME to be set correctly on your system. The Problem: When I tried to check the Maven version on our macOS PC, I got the following error in the output. mvn –version The JAVA_HOME environment variable is not defined correctly, this environment variable is needed to run this program. The Solution: As the error message clearly shows that the JAVA_HOME environment variable is not set on my PC. So the simple solution is to set it correctly. Use…

Recent versions of Debian and Ubuntu have moved away from the apt-key command for importing GPG signing keys, a shift initiated with Debian 11 and Ubuntu 22.04. This command was previously used for adding GPG keys to the system but now generates a warning: “Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).” While apt-key can still be used, future releases plan to eliminate its support entirely. This guide focuses on a secure alternative for importing GPG repository signing keys into systems like Ubuntu, Debian, Linux Mint, and Pop!_OS using the signed-by method. Importing GPG Keys Without…

Google Chrome is one of the most popular web browsers with over 1 billion users worldwide. It can be used on Windows, macOS, and Linux. To install Google Chrome on a Mac, you need to use its standalone installer file from the official website. This guide will show you how to install Google Chrome on macOS. Steps to Install Google Chrome on macOS To install Google Chrome on your Mac, follow these steps: Open Safari and visit google.com/chrome. Download Application: You will see a download button in center of page as seen in below screenshot. Click the “Download Chrome” button…

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,…

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…