If your website, application or database runs in the cloud, there is a good chance it runs on Linux. Linux has become the default operating system for web servers, cloud platforms, containers and much of the software that businesses depend on daily. Choosing a Linux server for business workloads is rarely controversial any more, but understanding why, and which flavour to choose, helps you make better hosting and staffing decisions.
What Linux is
Strictly, Linux is an operating system kernel: the core that manages hardware, memory and processes. It is licensed under the GPL and developed by a very large community of individuals and companies. What you install on a server is a distribution: the kernel bundled with system tools, a package manager, security updates and support policies. Ubuntu, Debian, Red Hat Enterprise Linux and its compatible alternatives are common examples.
Why Linux dominates server workloads
Cost structure
Most distributions can be used without licence fees. Commercial distributions charge for subscriptions that include support and certifications, not for the right to run the software. For businesses running many servers, avoiding per-server or per-core operating system licences is a meaningful saving.
The web stack grew up on it
Popular web servers (Nginx, Apache), databases (PostgreSQL, MySQL, MariaDB), languages (PHP, Python, Node.js, Go, Java) and tools such as Docker and Kubernetes were built for or primarily run on Linux. Documentation, tutorials and hosting defaults assume it.
Stability and efficiency
Linux servers can run for long periods with minimal resources. A server needs no graphical desktop, so more memory and processor time are available for your applications, and there is less software to patch.
Automation
Almost everything on Linux can be configured through text files and the command line, which makes servers easy to script and manage with automation tools such as Ansible. Infrastructure can be described in code and rebuilt consistently.
Security model and transparency
Linux has a mature permission model, well-established security features and rapid public disclosure and patching of vulnerabilities. Its source is open to inspection. Security still depends on configuration and timely updates, but the foundations are strong.
Cloud and container standard
Major cloud providers offer many Linux images, and containers, the standard way to package modern applications, are built on Linux kernel features.
Choosing a distribution
| Distribution | Characteristics | Typical fit |
|---|---|---|
| Ubuntu Server (LTS) | Popular, well documented, long-term support releases, commercial support available from Canonical | Web applications, cloud deployments, general use |
| Debian | Community-driven, conservative and stable | Servers where stability matters more than the newest packages |
| Red Hat Enterprise Linux (RHEL) | Commercial subscription, long support lifecycle, wide vendor certification | Enterprises, certified commercial software |
| AlmaLinux, Rocky Linux | Community distributions designed to be compatible with RHEL | RHEL-style environments without a subscription |
| SUSE Linux Enterprise | Commercial enterprise distribution with long-term support | Enterprises, certain business applications |
Key criteria: how long each release receives security updates, whether your applications are certified or tested on it, the availability of commercial support if you need it, and your team's familiarity. Check each distribution's official site for current support lifecycles.
For most business servers, choose a long-term support (LTS) release rather than the newest short-lived version. LTS releases receive security updates for several years, reducing how often you must perform major upgrades.
Linux vs Windows Server
Windows Server remains the right choice for some workloads: Active Directory domain controllers, Microsoft Exchange on-premises, applications built on the older .NET Framework, and certain line-of-business software that only supports Windows. Modern .NET runs well on Linux, though, and many organisations run a mix: Windows for identity and specific applications, Linux for web, databases and containers. Choose per workload rather than standardising for its own sake.
What running a Linux server for business really requires
Linux is not maintenance-free. A properly run business server needs:
- Regular security updates, often automated for security patches, with reboots scheduled for kernel updates or live patching where available.
- Hardening: SSH key authentication instead of passwords, disabled root login over SSH, a firewall allowing only needed ports, and tools such as Fail2ban to block brute-force attempts.
- Least privilege: separate user accounts, sudo for administrative tasks, and services running as unprivileged users.
- Monitoring: disk space, memory, CPU, service health and certificate expiry, with alerts that reach a person.
- Backups stored off the server, with tested restores.
- Log review and retention appropriate to your needs.
- Lifecycle planning: upgrading to a new release before the old one reaches end of support.
Skills and support
Linux administration skills are widely available, but a single part-time administrator is a risk: if they leave, knowledge leaves too. Document configurations, use automation so servers can be rebuilt, and consider a managed service for round-the-clock monitoring. Our server management service covers patching, hardening, monitoring and backups for Linux servers, and cloud solutions covers designing the environment they run in.
Key takeaways
- Linux dominates servers because of its cost structure, ecosystem, efficiency, automation and cloud support.
- Choose a distribution with a long support lifecycle that suits your applications and team.
- Windows Server still fits specific workloads; mixed environments are common.
- Linux servers still need updates, hardening, monitoring, backups and lifecycle planning.