CentOS vs Ubuntu: Which Linux Distribution Should You Choose?

CentOS vs Ubuntu is one of the most common comparisons for anyone researching Linux servers. If you’ve spent any time exploring hosting environments or choosing an operating system, you’ve probably hit the same question most people do: CentOS or Ubuntu?

It’s one of the most asked questions in the Linux world, and rightfully so. The operating system you choose affects everything, how you install software, how often you update, how stable your server stays, and what happens when something breaks at any time.

Here’s the thing though: this isn’t a settled debate with one winner. It never was. The right answer depends entirely on what you’re building, whom you are building it with, and how much hand-holding you need when things go sideways.

In this guide, I’m going to break down both distributions honestly, where they shine, where they fall short, and which one actually makes sense for your situation. No fluff, just what I have learned from working with both in real server environments.

TL;DR

• CentOS is no longer actively developed, if you’re starting fresh today, Ubuntu is the practical choice
• Ubuntu wins on community size, software availability, and predictable release cycles
• CentOS (now replaced by CentOS Stream) still matters for legacy RHEL-aligned deployments
• For new projects, Ubuntu LTS is the safest bet
• If you need RHEL compatibility, look at Rocky Linux or AlmaLinux instead

Understanding the Foundation: What These Distros Actually Are

Before diving into the comparison, it helps to know what you’re actually choosing between.

Linux distributions are built in layers. At the core, there’s the Linux kernel, the thing that talks to your hardware. Around that kernel sits a collection of system tools, libraries, package managers, and desktop environments that together make up a complete operating system.

The key insight: different distributions make different trade-offs. Some prioritize cutting-edge features. Others prioritize stability above all else. Some are backed by companies with deep pockets. Others rely entirely on volunteer work.

CentOS and Ubuntu represent two fundamentally different philosophies, even though both run on the Linux kernel. Understanding that philosophy is more useful than memorizing feature lists.

What Is CentOS?

CentOS stands for Community Enterprise Operating System. It’s derived from the same source code that Red Hat uses for Red Hat Enterprise Linux (RHEL).

Think of it this way: Red Hat writes a lot of enterprise software, tests it rigorously, and then releases the underlying code under an open-source license. CentOS takes that code, repackages it without the Red Hat branding, and offers it completely free.

For years, this was a fantastic deal. You got enterprise-grade stability without the enterprise price tag.

Here’s the catch that trips people up: CentOS Linux as you knew it is gone. In 2020, Red Hat announced it was discontinuing CentOS Linux in favor of CentOS Stream, which is a rolling-release upstream development platform, not the stable downstream distribution CentOS users trusted.

What this means practically: if you are running CentOS Linux today, you are on a system that no longer receives official updates or security patches. That’s not a hypothetical risk, it’s the current reality.

Who CentOS Was Built For

CentOS made sense for organizations that:

• Needed binary compatibility with RHEL without paying for RHEL subscriptions
• Ran stable, long-lived server workloads (internal tools, databases, web servers)
• Had sysadmins comfortable with RHEL-style tooling

If that sounds like your use case, the answer isn’t “choose CentOS” anymore, it’s to look at Rocky Linux or AlmaLinux, which are community-driven rebuilds of RHEL designed to fill exactly the gap CentOS left behind.

What Is Ubuntu?

Ubuntu is a distribution built on top of Debian, one of the oldest and most respected Linux distributions still active. Ubuntu is developed and supported by Canonical, a company headquartered in the United Kingdom that oversees and finances its ongoing development.

What Ubuntu did differently from the start: it made Linux accessible. While other server-focused distros expected you to be comfortable compiling software from source or configuring everything by hand, Ubuntu shipped with sensible defaults, a readable package ecosystem, and documentation that actually helped.

Ubuntu releases new versions on a strict six-month schedule. Every two years, one of those releases is an LTS (Long Term Support) version, these get five years of free security updates (ten years with Ubuntu Pro), making them predictable and stable for production servers.

Why Ubuntu Became the Default Choice

There’s a reason Ubuntu is what most hosting platforms, cloud providers, and tutorials default to:

• Massive community: if you have a problem, someone has already solved it and posted the fix
• Vast software repository: thousands of packages available via apt
• Predictable release cycle: you know exactly when new versions drop
• LTS stability: the 5-to-10 year support window is perfect for servers you don’t want to rebuild every six months
• Canonical behind it: commercial backing means dedicated security teams and infrastructure

The trade-off? Ubuntu pushes updates more aggressively than CentOS ever did. If you want the absolute newest packages, that’s great. If you want a system that stays frozen for five years, you need to stick to LTS and be deliberate about which packages you update.

Deep Comparison: CentOS vs Ubuntu

Let’s get into the specifics that actually matter when you’re running a server day-to-day.

Package Management: The Day-to-Day Difference

This is one of the most practical differences you’ll notice immediately.

CentOS uses DNF (Dandified Yum)

The modern evolution of the older YUM tool. Functionally, it’s similar:

sudo dnf install nginx

sudo dnf install nginx

But the package availability is narrower. CentOS’s repository are conservative, they prioritize matching RHEL’s versions, which means you often get older versions of software than you’d find on Ubuntu.

Ubuntu uses APT (Advanced Package Tool)

Installing software looks like:

sudo apt update
sudo apt install nginx

sudo apt update
sudo apt install nginx

The repository is massive. Want to run Node.js, Python, PHP, a database, a caching server? All in the official repository, all one command away. Configuration files go in predictable places, and the system handles dependencies automatically.

For popular web software, CentOS is usually fine, but if you need the latest version of something specific, you might find yourself adding third-party repository or building from source.

Stability Philosophy: Two Different Bets

CentOS and Ubuntu have opposite definitions of “stable”.

CentOS (in its original form) bet on point-in-time stability, you pick a version, it stays exactly as-is for its entire supported life. No surprises, no unexpected behavior changes from updates. The downside of CentOS is you’re running software that’s increasingly old by the time the support cycle ends.

Ubuntu’s LTS bet is rolling security stability, the base system is frozen, but security patches and critical bug fixes are backported continuously. You get the same kernel and core libraries for five years, but with actual security fixes applied. For most server workloads, this is the better deal.

Release Cadence and Planning

If you hate surprises, this matters:

• CentOS had no new versions in its traditional sense since Linux EOL. CentOS Stream updates continuously, but it’s a rolling release, meaning your system changes over time rather than staying frozen.
• Ubuntu non-LTS releases come every six months and are supported for nine months. These are for desktop users who want the latest features or developers testing against new software.
• Ubuntu LTS releases come every two years and are supported for five years (ten with Ubuntu Pro). These are what you want for servers.

For servers, the predictability of Ubuntu LTS is hard to beat. You know your support window from day one. CentOS Linux gave you that too, but again, it’s gone.

Security and Patching

Both distributions take security seriously, but the delivery differs.

• CentOS backported security fixes to its specific versions. If a vulnerability affected CentOS 7, the patch was written specifically for CentOS 7’s version of that software. This is thorough but can sometimes result in patches that feel slow.
• Ubuntu has a dedicated security team that publishes updates through its security repository. For LTS versions, these patches apply to the current state of the software without changing its behavior in other ways, you get fixes without feature changes.

Ubuntu also has Ubuntu Pro, a paid add-on that expands security maintenance to wider portions of the system. For regulated industries or businesses with compliance requirements, this can be worth it.

Commercial Support Options

If something breaks and you need someone to call:

• CentOS Linux: No commercial support option, full stop. You’re on your own or relying on community forums.
• Ubuntu: Canonical offers paid support plans at various tiers. For businesses that need a vendor to be accountable, this is a real option.
• Additionally, RHEL and Rocky Linux/AlmaLinux both have or can have commercial support contracts if you need them.

For production environments where downtime has real cost, having a commercial relationship with your OS vendor isn’t a luxury, it’s risk management.

Ecosystem and Community

• CentOS’s community was strong too, but smaller, and many resources redirected to RHEL documentation rather than CentOS-specific guides.
• Ubuntu’s community is enormous. Documentation is thorough. Stack Overflow has answers for almost everything. Forums, tutorials, and blog posts all assume Ubuntu as the default.

In practical terms: if you’re learning and will frequently Google errors or follow tutorials, Ubuntu is going to be a smoother experience.

Default Configurations and Ease of Use

Both are server-grade operating systems, neither is “easy” in the sense of holding your hand. But Ubuntu’s defaults are generally more forgiving.

• On CentOS, you might find yourself configuring firewalld or iptables directly.
• On Ubuntu, firewall setup with UFW is straightforward. Ubuntu’s SSH configuration out of the box is reasonably secure.

Both require you to harden things yourself, but Ubuntu’s ecosystem has more tooling and guides for doing it cleanly.

Feature Comparison Table

When to Choose CentOS (or Its Alternatives)

Here’s where it gets nuanced. CentOS Linux itself isn’t a choice anymore for new projects. But the philosophy CentOS represented, enterprise stability without enterprise pricing, lives on.

Rocky Linux and AlmaLinux are both community-driven distros built to be binary-compatible with RHEL, just like CentOS used to be. If your requirements are:

• You need RHEL compatibility
• You want a stable, frozen base that doesn’t change unexpectedly
• You have existing CentOS muscle memory

Then Rocky Linux or AlmaLinux is what you’d actually deploy today, not CentOS. It is perfect if you are on a fast-moving development team. The six-month support window on interim releases means frequent upgrades, or you’ll find yourself on an unsupported system fast.

When Ubuntu Makes Sense

Ubuntu makes sense when:

• You’re starting a new project today: LTS versions give you a clean, stable foundation with five or more years of support without surprises
• You want the biggest software library: apt repos have almost everything, and if they don’t, PPAs and Snap packages fill the gaps
• You’re learning: the community size means tutorials, guides, and solutions are everywhere
• You need predictable support windows: you know exactly when Ubuntu 24.04 LTS stops getting updates, and that’s a date you can plan around
• You want cloud-friendly: AWS, GCP, Azure, and DigitalOcean all have Ubuntu images ready to go, often with optimized kernels and cloud-init built in

For most people starting a web project, a SaaS application, or a business tool, Ubuntu is the answer.

The honest reality: For the vast majority of new projects, Ubuntu LTS is still the better choice simply because of ecosystem, community, and ongoing development. But if you have a specific reason to need RHEL compatibility, certain software vendors only certify for RHEL, internal tooling that depends on RHEL versions, then an AlmaLinux or Rocky deployment makes real sense.

My Honest Take

After working with both distributions in production environments, here’s what I’d tell you:

If you’re starting fresh, go with Ubuntu LTS. The ecosystem is alive, the support windows are predictable, the community is huge, and you won’t find yourself stuck on an unmaintained system in three years.

CentOS taught us something important: “free” and “community-supported” has limits. When Red Hat pulled the plug, CentOS Linux users had a scramble. Ubuntu’s commercial backing by Canonical, even with the freemium model, means there’s an entity with a financial incentive to keep the project healthy.

The one exception: if your organization is already deeply invested in the RHEL ecosystem, or you need binary compatibility with certified RHEL software, then look seriously at Rocky Linux or AlmaLinux instead. They carry the torch CentOS dropped, and they do it well. But for everyone else? Ubuntu LTS is the default for a reason.

Key Takeaways

• CentOS Linux is discontinued, don’t start new projects on it
• Ubuntu is the practical default, large community, vast repos, predictable LTS releases
• CentOS Stream is a rolling release, not the stable CentOS people remember
• Rocky Linux and AlmaLinux have emerged as leading replacements for CentOS Linux, offering compatibility with RHEL-based environments.
• For most modern web applications, SaaS platforms, and cloud-based servers, Ubuntu LTS is generally the preferred choice.
• DNF/YUM vs APT is a real day-to-day difference, Ubuntu’s package ecosystem is larger
• Commercial support is available for Ubuntu via Canonical; CentOS Linux had none

Conclusion

The CentOS vs Ubuntu debate used to be a genuine fork in the road. Today, one of those paths has a “road closed” sign on it. For most developers and teams building new projects, Ubuntu LTS is the right default choice. You get stability without stagnation, a massive software ecosystem, and a community that has solved almost every problem you’re likely to encounter.

If you’re coming from a CentOS background and mourning the loss of that stable, predictable server experience, the good news is that Rocky Linux and AlmaLinux have picked up that torch faithfully. But for everyone else, Ubuntu remains the workhorse that just works. Pick Ubuntu, start building, and don’t look back.

FAQs

About the Author

Meghna Meghwani is a technical writer focused on Linux, Ubuntu, VPS hosting, server management, WordPress, PHP, Node.js, cloud hosting, and DevOps. She creates beginner-friendly tutorials, practical hosting guides, troubleshooting articles, and server security content designed to help developers and businesses manage applications and servers more efficiently.