Containers are run in the cloud. That's because container technology allows websites and web apps to spawn fresh copies of themselves as demand increases. They're the reason hundreds of millions of people can use popular sites without those sites buckling under the pressure of global traffic. Containers are a Linux technology, meaning that they rely on code (specifically cgroups and namespaces) unique to the Linux kernel, so when you run a container, you're running Linux.

NMState is a declarative network manager for configuring networking on Linux. It’s a library that provides a command-line tool that manages network settings.

In this post we are going to provision HTTPS certificate from Let's Encrypt and use that in our SSL termination program nginx. We are going to use Ansible for this automation.

Today I want to share with you some behaviour that I learnt the other day that you might find helpful when working with Batfish. This behaviour is based upon the following: When working with impact analysis and using layer1 topologies in Batfish. Don't use named references within your reachability questions.

In this post, we will learn how to create and use macvlan network in docker. Macvlan network allows containers to interact with physical nic of docker host.

In today's world full of microservices, gaining observability into the messages sent between services is critical to understanding and troubleshooting issues…

In this article we will explain how to use Nginx to set up name-based and ip-based virtual hosting in CentOS/RHEL 7 servers and Debian 8 and derivatives, starting with Ubuntu 15.04 and its spin-offs.

I found a new terminal plugin called Fig.io that gives me super powers! It has full autocomplete and IntelliSense just like inside of VS Code. This plugin is completely free (Mac only though), so you can head to the website now to download and instal...

Learn why BusyBox has suddenly gained a following among certain Linux users.

What we're going to do is deploy a container, for an NGINX server, modify it, and then create a new image from that running container that you can then use to base new containers from.

In this guide, we will demonstrate how to install DistroBox to run any Linux distribution as a container image inside your Linux terminal.

Terraform is one of the most popular infrastructure as code (IaC) tools. With Terraform, you can write code that defines the infrastructure components you want and the configuration for them. You then execute that code, and Terraform will make sure that your infrastructure is set up the way you defined it. This means either creating […]

via Raspberry Pi-Spy Setting up SSH keys on a Raspberry Pi is relatively easy and can make connecting to one over a network more convenient. In this tutorial we’ll explain how to create and configu…

Using SSH profiles can help you in cases where you regularly connect to various servers. No need to remember the IP address and other such details for SSH connection.

With the right setup of folders and file names, you’ll always be able to find what you need on your computer.

Beautifying and modernizing your command line experience. A tour of emulators, text options, and prompt styling.

Learn how to build a network automation stack using the open-source tools, Nornir, Napalm and Netbox.

Best of 2021 - Scopes of Knowledge Best of 2021

2021 has been an exciting year for Kubernetes, and these articles prove it. From fun interfaces to homelabs to development environments, check out my favorite articles from 2021, K8s style.

Maui Shell is a convergent desktop shell for Linux desktops, tablets, and phones that runs on top of Wayland or X11.

We can set up our own remote access VPN server with little knowledge of programming using open-source software bundles such as Algo VPN…

Sysadmin trick of the day – if a server is down and you don't know when it will be back up, use `ping -a` to hear when it comes back up. The `-a` flag enables audio alert.

Get your SQL container to build with a pre-deployed dacpac file, perfect for those testing scenarios that require a database.

In this guide we will explore how to configure a scan policy on Nessus, later we will also use this policy to create a scan. We will then select a tar...

Arpwatch is an open source computer software program that helps you to monitor Ethernet traffic activity (like Changing IP and MAC Addresses) on your network.

Experiencing the "no sound" problem on Ubuntu after a fresh installation or an upgrade? Resolve it with these simple fixes.