network management

The Domain Name System (DNS) is the backbone of the internet, translating human-friendly domain names into IP addresses that computers use to identify each other. With cloud computing becoming the norm, managing DNS routing in a cloud environment is a vital skill for system administrators and developers. Using Bash, the default shell on Linux and other UNIX-like operating systems, can streamline this process remarkably. In this guide, we will explore how to manage cloud-based DNS routing using Bash scripts effectively. DNS in the cloud isn't fundamentally different from traditional DNS, but it provides greater scalability, resilience, and ease of management — qualities essential in the cloud computing landscape.

Docker has revolutionized the development and deployment landscapes by making it incredibly easy to containerize and distribute applications. Networks in Docker enable isolated systems to communicate with each other and with the outside world while maintaining a high level of security. Managing these networks efficiently can greatly enhance your container setup. In this comprehensive guide, we will delve into the methods of managing Docker networks using Bash scripts, facilitating easier automation and management of Docker containers. Before delving into scripts and automation, it’s critical to understand the basics of Docker networking.

In the world of Linux, where flexibility and configurability reign supreme, even network management tools vary significantly between distributions. Two notables among the myriad of network configuration managers available in the Linux ecosystem are Netplan and Wicked. While both tools serve the primary role of managing network settings, they originate from and are default options in different distributions—Netplan for Ubuntu and Wicked for openSUSE. Let’s dive deep into both, comparing their features, usage, and which might suit various user needs better. Introduced in Ubuntu 17.10 as a default networking configuration tool, Netplan is a simple and easy-to-use utility to configure networks.

Network management is an essential skill for any system administrator, and when it comes to Linux, tools like bridge-utils become invaluable. Frequently used to facilitate the virtual networking setups, particularly involving virtual machines and containers, bridge-utils provides command-line utilities to create and manage network bridges on Linux. In this article, we'll dive into what a network bridge is, why it’s useful, how you can install bridge-utils using different package managers like apt, dnf, and zypper, and some basic commands to get you started. Before we jump into the installation and usage of bridge-utils, let's clarify what a network bridge is.

When it comes to managing network interfaces in Linux, the traditional ifconfig tool has seen its day. Modern Linux distributions have largely replaced it with the more powerful ip tool, which is part of the iproute2 package. The ip command offers a comprehensive framework for managing network configurations, allowing you to configure network interfaces, set routing tables, manage ARP tables, and much more. In this blog post, we'll look at what makes the ip tool so essential, how to install it, and some basic usage examples to get you started. The ifconfig tool, part of the net-tools suite, has been the traditional tool for network interface management.

For organizations relying on Red Hat Enterprise Linux (RHEL) across multiple systems, managing updates can be a cumbersome and time-consuming process. Centralizing this process not only helps in saving bandwidth and time but also ensures consistency in the updates applied across all systems. In this blog, we'll explore how to set up a centralized update server for RHEL and provide instructions for integrating it with various package managers such as DNF (the default for RHEL), APT (commonly used in Debian-based systems), and Zypper (used in openSUSE). The first step in creating a centralized update server is setting up a local repository server that will store all the updates.