Of the many changes created by the pandemic, one of the more enduring is that remote work is still the norm. Networking makes this possible. Understanding and appreciating how networks work and are designed is a needed skill, especially in this digital world.
As a sysadmin, it's essential to have networking knowledge. The Enable Sysadmin community writes many articles that are a tremendous help in advancing your sysadmin skills. This article summarizes the 10 networking articles that were most popular with readers in 2021. In them, you have the opportunity to learn networking basics, including:
- How to automate network configuration and settings
- How to gather information about hosts in your network using scanning tools such as Nmap
With their many years of experience, the authors in the community went even further to explore other important networking topics, such as:
- Container networking
- Analyzing traffic as it traverses the network using tools such as
- How to configure and set up DNS and DHCP services.
Top 10 networking articles of 2021
The following are the most-read articles about networking on Enable Sysadmin in 2021.
Networking is an important sysadmin function. Check out this article I wrote about seven essential commands that are used frequently by sysadmins to enhance their job. You may find it valuable in your daily work.
Seth Kenlon explains the basics of networking in this terrific article. He explains how a device knows what network to connect to, how to find a shared printer or file share, and how to understand the biggest network of all, the internet.
Finding information about a host or a system shouldn't be complicated. Nmap is an open source network scanning tool you ought to have in your sysadmin toolbox. Nate Sias shows you how to gather an IP address, operating system version, filtered port, and more information using Nmap.
Kedar Vijay Kulkarni helps you learn how to use
tcpdump to find out what happens under the hood while traffic moves from one system to another. This first part of a three-part series looks at six basic tricks to gather information about the interfaces and starting captures.
In this second part of the series, Kedar adds six more options and parameters that help capture and view data from
tcpdump. You can analyze traffic to help troubleshoot complex network issues with these options. And, when you finish, check out part 3 of the series, 6 advanced tcpdump formatting options, which barely missed the top 10 list.
Kedar also helps you discover how you can write plugins to configure network interfaces in Linux containers. CNI also provides specifications for adding, deleting, connecting, and disconnecting containers to networks.
Does adding a network interface to multiple servers bore you? Shiwani Biradar's article shows you how Ansible roles can automate this task while you enjoy your coffee.
DNS allows you to use names instead of IP addresses to locate information on the internet. Ashish Bharadwaj Madabhushana helps you understand DNS and how you can set it up using the open source tool Bind.
Why choose dynamic IP addressing over static? Damon Garn takes a deep dive here. His article gives a good understanding of how to make the best choice for a given situation.
Get your hands dirty by switching on the DHCP server. Damon takes you through the deployment process, and it's a fantastic read.
I hope you find all these articles as useful as I did. And if you have a networking survival tip, consider sharing it by writing for Enable Sysadmin. Join our community and continue the tradition of knowledge sharing that makes the Linux ecosystem great.