Nix vs Ubuntu Server

Nix is a free package management and system configuration tool for creating reproducible, declarative systems. It builds packages in isolation to avoid undeclared dependencies and help keep builds consistent across machines. Users can define and share development and build environments across projects and languages, install software from URLs or source code, and use virtual machines for integration testing. Nix supports dependency resolution, lockfiles, workspaces and offline installation; its package formats include Nix expressions, derivations and flakes. The Nix Packages collection offers over 140,000 packages. The wider ecosystem supports remote builds and deployments, binary caches, cross compilation, atomic upgrades and rollbacks to earlier package versions. Nix runs on Linux and macOS, and on Windows through WSL2; multi-user Windows installation requires WSL systemd support. Documentation includes guides for GitHub Actions, Docker images, Terraform deployment, SSH provisioning and distributed builds. Nix is aimed at people familiar with command-line interfaces and plain-text editors, including developers, test engineers, DevOps engineers, system administrators, data scientists, students and open-source enthusiasts. It has no paid plan listed.

Ubuntu Server is a Linux operating system for enterprise data centers, public or private clouds, Kubernetes clusters and render farms. It can be deployed on physical servers, virtual machines, cloud instances and IoT or edge devices. The server page describes a lean initial deployment, integrated deployment and application modeling tools, and hardware OEM certification.

LTS releases receive five years of standard security updates for thousands of open-source packages in the Ubuntu Main repository. Ubuntu Pro extends LTS security maintenance to ten years, with a Legacy add-on extending it to 15 years. Pro also includes kernel live patching, security hardening features for named compliance frameworks, and Landscape fleet management. Ubuntu Server is available for Intel or AMD 64-bit systems, ARM, IBM POWER, IBM Z and RISC-V. Listed installation requirements are 1.5 GB of system memory, 5 GB of free disk space and a USB port or DVD drive for installer media. The server itself is free; Ubuntu Pro Workstation costs $25 a year per machine.