Author: Rahul

When working with the Linux find command, you might need to search for files or directories while excluding certain directories from your search results. This can be especially useful when dealing with large file systems or directories with many subdirectories. By using the -prune option or combining the find command with the ! (negation) operator, you can efficiently exclude specific directories, streamlining your search process. In this guide, we’ll walk you through simple steps to exclude directories in your find command, helping you save time and avoid unnecessary search results. 1. Using -prune Option The -prune option prevents find from…

Securing your SSH server is important to keep your system safe from unauthorized access. One of the best tools to protect your SSH server is Fail2Ban. It monitors your server logs and automatically blocks IP addresses that show signs of malicious activity, like too many failed login attempts. In this article, we’ll guide you through securing your SSH server in 5 easy steps using Fail2Ban on Debian and RHEL-based systems. Step 1: Install Fail2Ban First, you need to install Fail2Ban on your server. For Debian-based systems (like Ubuntu): Open your terminal and run the following command: sudo apt update sudo…

Keeping your Ubuntu 24.04 server secure is crucial, especially if it’s exposed to the internet. One common threat is unauthorized access attempts, particularly through SSH. Fail2ban is a powerful tool that can help protect your server by automatically blocking suspicious activity. In this guide, we’ll walk you through the steps to install and configure Fail2ban on your Ubuntu 24.04 server. This guide is designed for beginners, so we’ll keep everything straightforward and easy to follow. Step 1: Update Your System Before installing anything, it’s a good idea to update your system to make sure all your packages are up to…

UFW, which stands for Uncomplicated Firewall, is a user-friendly tool for managing firewall rules on Linux systems. It simplifies the process of controlling network traffic, making it easier for users to allow or block ports. This guide will walk you through the steps to open ports 80 (HTTP) and 443 (HTTPS) using UFW. By following these instructions, you will learn how to enable these ports, check the status of your firewall rules, and how to remove these rules when they are no longer needed. Open Port 80 and 443 in UFW With UFW, you can allow ports either temporarily or…

Ubuntu is a popular Linux operating system known for its ease of use and powerful features. One useful tool for managing your clipboard is pbcopy, a command that makes copying and pasting text in the terminal very easy. However, pbcopy is not available by default on Ubuntu. This guide will show you, step by step, how to install and use pbcopy on Ubuntu. Even if you are a beginner, you will find these instructions simple and easy to follow. Installing pbcopy Open the Terminal: You can open the terminal by pressing Ctrl+Alt+T on your keyboard. Update Your Package List: Before…

Nagios is a powerful tool for monitoring your IT infrastructure. It helps keep track of system performance and alerts you to any issues. In this guide, we’ll walk you through how to install and configure the Nagios NRPE (Nagios Remote Plugin Executor) client on Ubuntu 24.04. We’ll also show you how to add a host on the Nagios server for monitoring. What You Need A server running Ubuntu 24.04 Nagios server already set up and running Basic understanding of Linux commands Step 1: Update Your System First, make sure your system is up to date. Open the terminal and run:…

Zabbix is a powerful open-source monitoring tool that helps you keep track of your servers, networks, and applications. Once you have configured Zabbix server in your hosting environment, the next step is to add remote hosts for monitoring. The Zabbix Agent collects data from your server and sends it to the Zabbix server for monitoring. This guide will show you how to install the Zabbix Agent on Ubuntu 24.04. It is designed for beginners, so even if you have little experience with Linux or Zabbix, you can follow along and get your Zabbix Agent up and running. Step 1: Update…

When you work with databases, you might see the error message: “Access denied; you need (at least one of) the SUPER privilege(s) for this operation”. This happens when your database user doesn’t have enough permissions to do something. Here, we will look at some common situations that cause this error and how to fix them. Case 1: Creating or Changing Database Objects If you try to create or change database objects like tables, stored procedures, or views, you might get the “Access denied” error if your user account doesn’t have the right permissions. Solution: Give the necessary permissions to your…

HAProxy, an open-source load balancer, is essential for optimizing the performance and reliability of your web applications. By distributing incoming traffic across multiple servers, it ensures that no single server becomes overwhelmed, thus maintaining the availability and stability of your services. Ubuntu, a popular Linux distribution, provides an ideal environment for deploying HAProxy due to its robustness and user-friendly nature. In this guide, we will walk you through the process of installing and configuring HAProxy on Ubuntu 24.04 and 22.04 LTS. Whether you are a beginner or have some experience with Linux, this tutorial is designed to be simple and…

In Python, you can change a string or part of it using the replace() method from the str class. The replace() method needs two things: the old string you want to change and the new string you want to use. In this tutorial, we’ll learn how to replace parts of a string in Python and how to replace parts of strings in a list. Replace a Substring in Python Here’s an example of how to use the replace() method to change a string in Python: # Original string string = “Hello, World!” # Replace the word “Hello” with “Hi” new_string…