System & Network Admin

Quick Recap Link to heading This is a follow up to my lengthy EVPN series. In my last post I demonstrated how I managed to have EVPN termination inside Kubernetes nodes, hosting FRR inside a regular network-namespaced pod interacting with the host via BGP through veth pairs. Overcoming the limitations Link to heading I also described how running inside a pod is limiting this architecture and prototype to serve the node’s main interface, because of the chicken egg-y issue of needing the underlay network to allow each node to reach the API server, while at the same time the configuration required to establish the underlay must be retrieved from the API server itself.

Abstract Now that we have a Vault, with a TLS Issuing CA, and some idea of how to get certs out of it, lets look at how we can use this in a “real” world scenario to put a valid TLS profile onto a Network Appliance (fancy word for a switch I guess). Why did I say appliance, and not Router or Switch? Weeeeeell, think about it. You manage a lot of network stuff over HTTPS protocols these days, even when its not actually a web interface you are using to do it.

ntopng (short for ntop) is an open-source network traffic monitoring tool that provides a user-friendly web interface to monitor network activity in real-time.

Learn how to easily make a bootable usb drive from iso file using linux terminal. Creating bootable usb from CLI is more easy and faster.

Don't have a CD or DVD drive? No problem---here's how to "burn" a Linux ISO file to a USB drive instead.

This guide introduces 60 essential Linux commands, providing a foundation for beginners and a pathway to becoming a skilled system administrator.

Over the course of the 1990s we saw huge developments in the world of PC graphics cards, going from little more than the original IBM VGA standard through super VGA and then so-called “Window…

MrChromebox.tech website

With Cron, you can schedule just about any type of job on Linux, such as backing up specific directories to an external drive.

An often overlooked dimension of data collection is flow data from hosts. This is not a new concept, there have been tools built for this for a very long time, but in many cases, and especially over the last 8-10 years, many system engineers have gravitated toward tooling like grafana and prometheus. While these are fine tools and if done well provide an excellent view of host health, they aren’t really a full picture of host behavior.

The EFF has issued a warning to online service providers, including ISPs, web site publishers, and bloggers, to start deleting their log files ASAP. The EFF has also created a free tool called logfinder that makes it easier to find and delete those log...

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Ditch complex, intrusive analytics for Fathom - a better Google analytics alternative. Experience ease of use, forever data retention & full legal compliance.

Open source macro application that is easy to use, powerful and low on pc resources. Available for Windows and Linux.

Why Unix time is not exactly what it is often described to be, and a proposal for fixing it.

How to look inside the protocol workings of the Stream Deck Plus, the flexible and versatile button box that can do almost anything.

Learn how to use Grafana to monitor SNMP devices using InfluxDB and Telegraf in 10 minutes or less, by using our step by step approach.

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

What do you do when a crowdfunded product you really liked gets cancelled? Naturally, you take the idea and build your own version of it. That’s what [Salim Benbouziyane] did when the Focus D…

Everyone likes something cheap, and when that cheap thing is a router that’s supported by OpenWRT, it sounds like a win. [Hennung Paul] ordered a Wavlink WL-WN586X3 for the princely sum of 39…

Create recognizable GUIDs from Hex-l33t words. Use this to generate constant GUIDs when needed. Guaranteed not to be unique.

Docker Compose Manager - Manage Docker Compose environments efficiently with ease.

In scenarios like changing the swap size, you should disable the swap first. This quick tutorial shows the steps for disabling swap in Linux.

Are you familiar with Huffman encoding? That’s where you pick shorter codes for more frequent letters. Morse code is the same way, in that the most-used letters are the shortest. [Matheus Ric…

Make your shell workflow as smooth as possible by creating helpers designed just for you.

Stream games at up to 4K at 60 fps from your gaming PC to your big TV.

World's simplest collection of useful PNG utilities. Resize PNG, rotate PNG, crop PNG, convert PNG to JPG, GIF, BMP, Webp, base64, and more.