System & Network Admin

What is CRXN? How does CRXN work? What are the goals of CRXN? Where can I find more information?

Instructions with example how to use WireGuard for a peer-to-peer connection. Preshared keys (PSK), wg-quick, integration in Systemd, key generation as well as dynamic and non-reachable peers are covered.

Example with explanations how to configure babeld.

In recent years, mesh networking has become a popular method of creating decentralized communication systems, […]

WireGuard is an advanced and modern VPN protocol with powerful cryptography. It is a simple, fast...

Explaining my home lab setup

Explains Linux and Unix bash/ksh shell scripting technique to convert uppercase to lowercase, including text files or variables.

I need to install the NerdFonts since I have been installing LazyVim recently. After doing some research, I found that the convenient way…

The tee command reads from standard input and writes to both standard output and one or more files at the same time. Tee is most commonly used in combination with other commands through piping.

Learn how to generate random numbers in a Linux environment.

Explore HashiCorp product documentation, tutorials, and examples.

I am writing a bash script which generates unattended GPG keys, I have looked through Unattended Usage of GPG and was surprised to find that 'Currently only one subkey can be handled.' I am unable...

Unattended GPG key generation (Using the GNU Privacy Guard)

SKILL LEVEL:  Advanced. In this article, we will be implementing one approach to centralize PGP key issuing and distribution for an organization.  We'll use an existing Linux instance's GnuPG tool to issue and manage keys.  To distribute keys to users, we'll use the 1Password CLI.   Let's dive in! The Infrastructure

To generate PGP keys on a Linux distribution we require the latest version of GPG (GnuPG). This is a free implementation of the OpenPGP standard which enables local key generation, encryption, and signing operations.

I am getting the following error running make: Makefile:168: *** missing separator. Stop. What is causing this?

I've got an Elixir application running inside a Docker container (in my laptop). The Elixir application was executed with the following command: iex \ --name test@1.2.3.4 \ --cookie secret \ ...

How can I connect two Erlang/Elixir-nodes of two different machines via network connection?

Apache Beam is an open source, unified model and set of language-specific SDKs for defining and executing data processing workflows, and also data ingestion and integration flows, supporting Enterprise Integration Patterns (EIPs) and Domain Specific Languages (DSLs). Dataflow pipelines simplify the mechanics of large-scale batch and streaming data processing and can run on a number of runtimes like Apache Flink, Apache Spark, and Google Cloud Dataflow (a cloud service). Beam also brings DSL in different languages, allowing users to easily implement their data integration processes.

Learn how to build a simple cli todo tool using elixir

Learn how to get your SSH keys easier to another system using different available methods such as manually or a tool like ssh-copy-id

Use these Linux commands to verify connection speeds, analyze delays, and test whether other systems are reachable.

I use a variety of calendars to organize my life, my family, and the many projects and businesses I'm involved with. Most of them use Google Workspace, but at work we use, for some unfathomable reason, Office 365. I run my life by my calendars. There's no way I could

We'll never get acquired. We'll never shut down. You pay, we keep the lights on.

What do you do when you need to choose an OS at boot but aren’t physically near your machine? [Dakhnod]’s inventive solution is a mix of GRUB, Wake-on-LAN (WOL), and a lightweight ESP82…

Hey friend! Have you heard about these new 5G cellular networks promising lightning quick speeds? Well with this clever little Raspberry Pi add-on called the 5G HAT, you can unlock 5G and turn your Pi into a speedy modern router in no time. Intrigued? Read on! An Introduction to 5G You‘ve likely heard the term […]

Learn about the differences between normal and privileged containers in Linux.