Author: Rahul

Linux systems keep many logs to help monitor and troubleshoot the system. One important log directory is /var/log/journal, which can sometimes grow too large and use up valuable disk space. In this guide, we’ll show you how to safely clear this directory. This guide is perfect for beginners, so don’t worry if you’re new to Linux! What is /var/log/journal? The /var/log/journal directory stores systemd journal logs. These logs contain information about various system services and can be useful for diagnosing problems. However, if left unchecked, these logs can grow and consume a lot of disk space. Why Clear the Journal…

In MySQL and MariaDB, you can create users that connect to the database using socket authentication instead of traditional username and password combination. This method is secure and convenient, as it uses the operating system’s user credentials. Here’s how you can set it up. What is Socket Authentication? Socket authentication allows a user to connect to the database without a password, using their Unix or Linux user credentials instead. This is useful for secure environments. This simplify the login processes by eliminating requirement of entering password for frequent users. How it Works? Socket authentication works by matching the operating system’s…

When you create a new Flask application, it comes with a built-in development server. Which is good because it helps you see errors and automatically reloads when you make changes. However, if you start your app using this server, you can only access it from your own computer, because it only listens on localhost (127.0.0.1). This means you can’t access this application from other devices on the same network So the question is, can we change this to allow access the application from other devices on the same network using the IP address of your computer? Answer is “Yes”. This…

When working with Linux, you might encounter situations where a specific port is occupied by a process, preventing you from using that port for other applications. Knowing how to kill a process running on a specific port can be very useful, especially for troubleshooting and managing your system effectively. This step-by-step guide is designed to help beginners understand how to identify and terminate these processes with simple, clear instructions. We’ll walk you through the process of finding the port number, identifying the process using that port, and safely stopping the process. By the end of this guide, you’ll have the…

Over the time, the Linux systems can have a large number of packages that are no more in use. These packages can take up huge disk space and might reduce your system overall performance. This guide will show you how to easily remove these unused packages. It’s important to keep your system clean and efficient, but be cautious: removing essential packages can cause your system to malfunction. Only remove packages you are sure are no longer needed. Why Should You Remove Unused Packages? There are several reasons to remove unused packages from your system: Free Up Disk Space: Unused packages…

In programming, efficiently managing and displaying the current date and time is a common task across many applications. The Go programming language, with its powerful standard library, makes handling date and time straightforward and effective. This beginner’s guide will walk you through using Go’s time package, which offers a wide range of functionalities for date and time operations. Whether you’re building a logging system, scheduling tasks, or adding timestamps to events, understanding how to manipulate date and time in Go is crucial. Let’s explore the versatility of the time package and how you can use it in your Go projects.…

When working with Docker containers, you might need to know the IP address of a specific container. This can be useful for debugging, networking, or connecting to services running inside the container. This guide will show you how to easily find the IP address of a Docker container using simple commands. Why You Might Need the IP Address There are several reasons you might need to find a Docker container’s IP address: Connecting to Services: Access services running inside the container from your host or other containers. Networking: Set up network configurations or troubleshoot networking issues. Debugging: Investigate connectivity problems…

Sometimes, you might want to grant a user sudo privileges for only specific commands instead of full administrative access. This guide will show you how to do that easily. We will also provide an example and a test scenario to ensure it works correctly. Keeping security in mind, you should allow only required permission that a user required to do there work. To allow command-specific sudo privileges to a user to run only certain commands with superuser rights. This can enhance security by limiting the user’s abilities. Note: Be careful while editing the sudoers file. Mistakes in this file can…

Linux is a powerful operating system, and for most tasks, you need admin or root access. However, giving root access directly to users can be risky. That’s where sudo comes in. In this article, we will explain how to properly configure sudo privileges in Linux in simple steps, so you can manage users and ensure system security. What is Sudo? Sudo stands for “Superuser Do”. It is a command in Linux that allows a permitted user to execute commands as the superuser or another user. By using sudo, you can allow normal users to run certain administrative commands without giving…

The update-alternatives command in Debian is a helpful tool to manage different versions of software on your system. It allows you to easily switch between different versions of the same program. Assuming you have installed multiple Java versions or Python versions on a single system. With the help of update-alternatives you can set any version of the program as the default version for your system. What is update-alternatives? update-alternatives is a command-line tool that helps you set up, maintain, and manage symbolic links for different versions of software. These symbolic links point to the actual files on your system, making…