Run NixOS in a DigitalOcean Droplet

This little tutorial will show you how to turn an Ubuntu Droplet (VM) on DigitalOcean into a NixOS Droplet using nixos-infect. NixOS is a Linux distribution which is declaratively configured using a specification written in the Nix expression language describing the desired state of the system. It supports automatic upgrades and rollbacks. Aside from DigitalOcean, you can run NixOS on most common computers. It’s possible to run NixOS on ARM64 computers, like on the Raspberry Pi 3.
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Run NixOS using Vagrant

In this tutorial we’ll create a NixOS virtual machine using Vagrant. This setup can be useful to setup an environment for learning NixOS. NixOS is a Linux distribution which is declaratively configured using a specification written in the Nix expression language describing the desired state of the system. It supports automatic upgrades and rollbacks. If something goes wrong, just revert to the working state. NixOS runs on common computers and architectures, and can be used both on laptops or workstations with a desktop environment, or on servers, both x86_64 and ARM64, like on the Raspberry Pi 3.
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Deploy a Kubernetes Cluster with Service Mesh on DigitalOcean Using K3s

This guide will help you set up a Kubernetes cluster, including a service mesh using k3s (at the time of writing at version 0.10.2) and Rio. We’ll deploy the cluster on DigitalOcean. Ubuntu 18.04 LTS will be OS during this tutorial. If you sign up to DigitalOcean using this link you’ll receive $50 to spend on their services over 30 days. If you wish to run your cluster on your own hardware, you could do so on Raspberry Pis (ARM64) or Intel NUCs (x86_64) for example.
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Upgrade Fedora 30 to 31

This tutorial will show the upgrade process for Fedora from version 30 to version 31. Fedora is a Linux distribution aimed at servers, workstations and all kinds of use cases. It runs on both x86_64 and arm64, and other platforms. This tutorial is aimed at Fedora Server, but it should work the same on Fedora Workstation. Prepare First of all, make a backup of your system. System upgrades should work fine, but from time to time they break.
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Deploy Bitwarden on Docker Swarm

In this tutorial we’ll deploy Bitwarden on Docker Swarm. It’s based on an earlier tutorial on this site, where we deployed Docker Swarm on DigitalOcean. Bitwarden is a password manager with support for self hosting. We’ll be using bitwarden_rs, an unofficial Bitwarden API server implementation, as it’s a fair bit faster than the default implementation. Bitwarden_rs is written in Rust and is compatible with the officla Bitwarden clients. Bitwarden has the following features, among others:
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