Ubuntu Server

Ubuntu Server is a Linux server platform for organizations running physical machines, virtual machines, cloud workloads or edge devices. It is strongest for teams that want one distribution across varied infrastructure, with paid security and support options as needs grow. Its free LTS maintenance is a solid starting point; longer coverage and enterprise services add meaningful cost.

Overview

Ubuntu Server is designed for deployments ranging from lean installations to enterprise data centers, public and private clouds, Kubernetes clusters and render farms. Deployment and application modeling tools, cloud images and hardware OEM certification support that breadth. This makes it a practical choice for infrastructure teams standardizing across environments, though its wide scope is less compelling for a narrowly defined firewall or router role.

LTS releases receive five years of standard security updates for thousands of open-source packages in the Ubuntu Main repository. Ubuntu Pro extends security maintenance to the full Ubuntu Archive for ten years, and a Legacy add-on extends it to 15. That gives teams a clear progression from free maintenance to longer coverage, but the extended term requires a paid option.

Key features

Juju deploys workloads across AWS, Microsoft Azure, OpenStack private clouds and bare metal through MAAS, which handles bare-metal provisioning. These tools are useful to operators coordinating cloud and physical deployments; teams with simpler infrastructure may have less need for them.

Ubuntu Pro adds Kernel Livepatch, which automates patching of high and critical kernel vulnerabilities while systems are running, allowing maintenance windows to be deferred. It also includes hardening features for frameworks and standards including FIPS 140, DISA-STIG, CIS, FedRAMP, CMMC, PCI-DSS and Cyber Essentials. Landscape provides centralized administration, staggered updates, asset inventory, hardening and audit functions. Together these services suit fleets with maintenance or compliance demands better than a basic installation alone.

Ubuntu Pro plus Support adds 24/7 expert break-fix and bug-fix support for infrastructure and applications. Ubuntu Pro also integrates with AWS, Azure and Google Cloud marketplaces, where customers can activate features and receive billing through their cloud provider.

Pricing

The core Ubuntu Server plan is free and includes five years of free security and maintenance updates for LTS. Ubuntu Pro can extend maintenance to up to 15 years. Ubuntu Pro Personal is free for up to 5 machines; Ubuntu Pro Community is free for up to 50 machines for active Ubuntu community members. These free options make the platform accessible for personal use and qualifying community members, but their machine caps matter as deployments grow.

Ubuntu Pro Workstation costs $25 a year, billed per machine per year. It does not include knowledge base access, certified Windows drivers for KVM guests or the Ubuntu Assurance Program. Ubuntu Pro Server with unlimited VMs costs $500 a year, billed per machine per year, and excludes those same items. The unlimited-VM entitlement is useful for virtualized server estates, but the per-machine billing and exclusions should be considered in budgeting.

Ubuntu Pro with 24/7 Enterprise support — Workstation costs $300 a year, billed full support per machine per year. Ubuntu Pro with 24/7 Enterprise support — Server with unlimited VMs costs $3,400 a year on the same per-machine basis. Weekday support is 50% of the price of 24/7 support for each. These plans fit organizations that need expert response coverage; teams that do not need round-the-clock support can choose the lower weekday rate.

Platforms

Ubuntu Server runs on Linux and can be deployed on physical servers, virtual machines, public, private or hybrid clouds, cloud images, and IoT or edge devices. Supported CPU architectures include amd64, arm64, armhf, ppc64el, riscv64 and s390x, spanning Intel or AMD, ARM, IBM POWER, IBM Z and multiple RISC-V platforms.

The current download is Ubuntu Server 26.04.1 LTS for Intel or AMD 64-bit systems, at 3GB. 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. Multipass creates Ubuntu virtual machines on Windows, Mac and Linux; VirtualBox, Hyper-V, HyperKit and KVM are also listed as virtualization options.

Who it's for

Ubuntu Server suits infrastructure teams that need a consistent Linux platform across cloud, data center and edge deployments, as well as organizations seeking extended security maintenance, fleet administration or compliance hardening. Its free LTS plan is a sensible fit where five years of standard maintenance is sufficient. Teams with longer-lived systems or formal support requirements can move to Pro, while small personal deployments can use the capped free option.

It is less suited to buyers seeking a purpose-built firewall and router system, or those who do not need a general-purpose server platform. Paid Pro and support plans also make less sense when extended maintenance, fleet management and expert response are unnecessary.

Pros and cons

Pros: Five years of LTS security and maintenance updates are free, giving production deployments a substantial baseline without a subscription.

Pros: Broad architecture and deployment support helps teams use one distribution across physical, virtual, cloud and edge systems.

Pros: Pro adds longer security maintenance, live kernel patching, compliance hardening and Landscape fleet tools for organizations that need them.

Cons: Free Pro tiers are capped at 5 or 50 machines, so larger estates need a paid plan.

Cons: Per-machine annual pricing can add up across fleets, and paid base plans exclude knowledge base access, certified Windows drivers for KVM guests and the Ubuntu Assurance Program.

Cons: The 24/7 support tiers are substantially more expensive than the base Pro plans, making them relevant chiefly where that response coverage is needed.

Alternatives

For a dedicated firewall and router system, consider pfSense, which offers a free Community Edition and a paid Plus software plan. Kali Linux is a free alternative for readers seeking an open-source distribution rather than Ubuntu Server’s server-focused platform. Choose HPE Morpheus VM Essentials Software when evaluating HVM hypervisor and VMware management software.

Nix is a free open-source package manager, while Rocky Linux offers a free, community-supported distribution with a 10-year support lifecycle. AlmaLinux OS is another free enterprise Linux distribution, with commercial support available separately. Manjaro Linux and MX Linux are also free Linux distribution alternatives.

Browse more options in Operating Systems.

Verdict

Choose Ubuntu Server if you need a versatile Linux foundation across cloud, physical and virtual infrastructure, and value five years of free LTS maintenance with an upgrade path to longer security coverage and enterprise services. Look elsewhere if your need is specifically firewalling and routing, or if Ubuntu Pro’s added maintenance and support do not justify per-machine costs for your deployment.