Linux is a popular operating system used by millions of users worldwide. As an open-source platform, it provides a high level of security and customization, making it an excellent choice for both personal and enterprise use. Linux admins are responsible for managing security of Linux systems, which can be a complex task. Fortunately, Linux offers many security features and tools that can help admins keep their systems safe. In this article, we will explore 20 useful security features and tools for Linux admins. Firewall A firewall is a network security system that monitors and controls incoming and outgoing network traffic. ... Read More

Introduction FreeBSD is a free and open-source Unix-like operating system based on Berkeley Software Distribution (BSD) system. It is widely used by developers, system administrators, and users who are looking for a reliable and secure operating system. One of main features of FreeBSD is its package management system, which allows users to easily install, update, and remove software packages. In this article, we will discuss 20 useful PKG command examples to manage packages in FreeBSD. Installing Packages To install a package in FreeBSD, you can use "pkg install" command followed by package name. For example, to install Apache web server, ... Read More

As a Linux administrator, one of most important aspects of maintaining a secure and stable network is implementation of an effective firewall. IPtables is a powerful firewall tool that comes pre-installed on most Linux distributions. In this article, we will explore 20 useful IPtables firewall rules that every Linux administrator should know. These rules will help you secure your network and prevent unauthorized access, while also allowing legitimate traffic to pass through. Block All Incoming Traffic Except SSH The first rule is to block all incoming traffic except for SSH. SSH is a secure way to access your server remotely, ... Read More

Introduction In world of Linux system administration, performance monitoring is an important task. There are a lot of tools available for this purpose, and one of most widely used is Sysstat utilities. Sysstat utilities are a collection of tools that provide detailed system performance information, including CPU utilization, memory usage, disk activity, and network activity. In this article, we will explore 20 useful commands of Sysstat utilities for Linux performance monitoring. Installation of Sysstat Utilities Before we dive into Sysstat utilities commands, let's first discuss how to install them. Sysstat utilities are typically included in most Linux distributions, so you ... Read More

Ubuntu 22.10 'Groovy Gorilla' has been released, and it is packed with exciting features and improvements. However, after installing operating system, there are some essential things you need to do to make most of it. This article will highlight 20 things to do after installing Ubuntu 22.10 'Groovy Gorilla' to enhance your user experience. Install Updates The first thing you need to do after installing Ubuntu 22.10 'Groovy Gorilla' is to install updates. Updating your system ensures that you have latest security patches, bug fixes, and new features. To update your system, go to 'Software Updater' application or run following ... Read More

Ubuntu 22.04 LTS (Focal Fossa) is latest long-term support release of Ubuntu, which means that it will be supported for five years with security updates and bug fixes. If you have just installed Ubuntu 22.04 LTS, congratulations! You are now ready to explore world of Ubuntu and take advantage of its many features and tools. In this article, we will discuss 20 things that you can do after installing Ubuntu 22.04 LTS to make most of your new operating system. These include customizing your desktop, installing new software, configuring your system settings, and more. Update Your System The first thing ... Read More

Fedora 26 Workstation is an operating system built on Linux kernel, which provides users with a highly customizable, secure, and powerful computing experience. It is designed to cater to developers, system administrators, and users who want to leverage latest technologies and features. If you have just installed Fedora 26 Workstation, here are 20 things you can do to make most of your new installation. Update Your System After installing Fedora 26, first thing you should do is to update your system. To do this, open terminal and run command − sudo dnf update This command will update your system ... Read More

Introduction If you have recently installed Fedora 24 or Fedora 25 on your workstation, congratulations! You now have a powerful and versatile operating system at your fingertips. However, there are still some things you should do to get most out of your new Fedora installation. In this article, we will discuss 20 things you can do after installing Fedora 24 or Fedora 25 workstation to optimize your experience and make your system more secure. Update Your System The first thing you should do after installing Fedora 24 or Fedora 25 is to update your system. This will ensure that you ... Read More

Introduction Amazon Web Services (AWS) is one of most popular cloud computing platforms in world. It provides a wide range of services, such as storage, computing, networking, and databases, to name a few. AWS Command Line Interface (CLI) is a powerful tool that allows you to manage your AWS resources using commands in terminal or shell. In this article, we will discuss how to install AWS CLI on Linux, including various sub-headings and examples. Step 1: Check Python Installation Before installing AWS CLI, you need to ensure that Python is installed on your Linux system. Python is a programming ... Read More

Introduction The Unix operating system is known for its powerful command-line interface and an extensive collection of tools. Among these tools, "uniq" command is a popular utility that is used to filter out duplicate lines in text files. This command is often used in conjunction with other command-line tools and shell scripts to manipulate data and automate tasks. In this article, we will explore "uniq" command in detail, including its syntax, options, and examples of its usage. Syntax The syntax of "uniq" command is simple and easy to understand. basic syntax of command is as follows − uniq [options] [input_file] ... Read More