NixOS VPS

NixOS is a Linux distribution built around the Nix package manager and Nixpkgs. It describes laptops or server fleets through declarative configuration, builds system changes before activation, and stores generations that can be used to roll back to earlier configurations. The Nix ecosystem emphasizes reproducible package builds, isolated dependencies, and upgrades that do not leave packages in an inconsistent state.

Nix Flakes is a Nix configuration and packaging mechanism that uses a `flake.nix` file in an application repository to define the application as a Nix package. The resulting package can be imported as a dependency by another flake, such as a VPS configuration. It operates within the Nix ecosystem, whose package manager is designed for declarative, reproducible system configurations and isolated package builds.

trynix is a browser-based environment for running packages from the historical Nixpkgs archive. It resolves a package and version through the nixpkgs-multiverse index, fetches its signed runtime closure from cache.nixos.org, and runs it in an x86_64 Linux virtual machine powered by QEMU compiled to WebAssembly. The browser decompresses the package archives into an in-memory filesystem shared with the guest over virtio-9p; the guest resumes from a migration snapshot rather than booting from scratch, then exposes the selected packages through shell commands. Environment state is encoded in the URL, including package selections, store paths, and additional binary caches. A GitHub Action can comment on pull requests with links that launch the store paths produced by a build, allowing reviewers to run branch builds in a browser. The project is MIT-licensed and can also be run locally with Nix.

Coolify is an open-source, self-hostable platform as a service for managing servers, applications, and databases on users' own hardware. It deploys static sites, full-stack applications, databases, and one-click services on VPSs, bare-metal machines, Raspberry Pis, and other servers, using an SSH connection rather than requiring a vendor-managed cloud environment. It uses Docker to build and deploy applications and supports Git-based deployments, preview deployments, SSL, backups, monitoring, multi-server setups, Cloudflare Tunnels, and an API. The project's configurations remain on the user's servers, so running resources can continue to be managed without Coolify, although its automations are lost. Coolify can be installed with a shell script and is also offered as a paid cloud version for users who do not want to self-host the Coolify server. The repository describes it as an alternative to Heroku, Netlify, and Vercel.

Devbox is a command-line tool for creating isolated, reproducible development shells. A project's `devbox.json` declares its required operating-system-level packages; Devbox uses Nix to make those tools available through commands such as `devbox shell` and `devbox run`, without installing them into the underlying machine or causing version conflicts between projects. The same environment definition can also be used for a devcontainer, Dockerfile, or remote development environment. Devbox was originally developed by Jetify.