Rocky Linux vs AlmaLinux: Which RHEL Alternative Should You Pick?

Rocky Linux vs AlmaLinux: what is the difference?

Rocky Linux and AlmaLinux are two free, community-run enterprise Linux distributions that stay compatible with Red Hat Enterprise Linux (RHEL). Both arose to replace CentOS Linux. The main difference lies in governance and approach: Rocky Linux keeps rebuilding from RHEL sources, while AlmaLinux targets binary (ABI) compatibility instead.

In the Rocky Linux vs AlmaLinux debate, daily server work feels almost identical. You use the same package manager (dnf), the same RPM format and largely the same configuration files. Therefore, the choice usually depends on team habits, control panel support and support contracts rather than on a technical edge.

We are Talha Aslan and team, a digital marketing and web team, not a hosting company. The technical details in this guide come from official announcements, project documentation and control panel vendor docs. We left out comparison claims we could not verify. Where we were unsure, we point you to the official source instead.

Why did Rocky Linux and AlmaLinux appear?

The story starts with CentOS Linux. For many years, hosting companies relied on CentOS as a free, production-ready rebuild of RHEL. In December 2020, Red Hat announced it would shift its focus to CentOS Stream. As a result, CentOS Linux stopped acting as the stable copy that trailed RHEL.

That decision sent companies and hosting providers looking for a free, long-lived RHEL-compatible system. Gregory Kurtzer, the original founder of CentOS, started the Rocky Linux project. According to the project's official page, the first stable release, Rocky Linux 8.4, arrived in June 2021. Meanwhile, the CloudLinux team launched AlmaLinux around the same time and later handed it to an independent foundation.

CentOS Stream, on the other hand, now works like a preview of the next RHEL minor release. In other words, it runs ahead of RHEL. We cover that difference in our separate CentOS Stream guide. The key point here is simple: Rocky Linux and AlmaLinux aim to fill the old CentOS role of a stable copy that follows RHEL.

Who governs Rocky Linux?

The Rocky Enterprise Software Foundation (RESF) hosts the Rocky Linux project. The project's About page states this relationship clearly and links to a separate page for the organizational details. Kurtzer has also explained that he named the project after Rocky McGaugh, an early CentOS co-founder.

On the commercial side, Rocky Linux lists commercial support providers on its official website. That list includes companies such as CIQ. Kurtzer is involved with CIQ, so some administrators question how much influence commercial firms have in the Rocky ecosystem. The project, for its part, stresses community governance and open source principles.

For you, the practical question is simple. Read the governance model and decide whether it fits your own risk appetite. That said, we see no official sign that either project will disappear in the short term. For long-term decisions, we recommend that you review the current bylaws and board of the relevant foundation yourself.

Who governs AlmaLinux?

The AlmaLinux OS Foundation runs AlmaLinux. It is a nonprofit organization registered in the United States under 501(c)(6) status. A board of directors makes decisions with input from foundation members. Board chair Benny Vasquez also announced the major change of direction in July 2023.

The CloudLinux team started the project and then moved it under the foundation. Today, its sponsors include various infrastructure and cloud companies. This setup aims to reduce the worry of dependence on a single company. On the other hand, like any foundation, AlmaLinux relies on sponsor income and volunteer contributions.

In short, both projects describe themselves as community-run, but their legal structures differ. Rocky Linux sits under the RESF, while AlmaLinux lives under a nonprofit foundation. In corporate procurement, this distinction sometimes shows up in vendor reviews and contracts. So if you have a legal or purchasing team, share the governance documents with them.

How do the two projects differ on RHEL compatibility?

The real split happened in June and July 2023. Red Hat restricted public access to RHEL source code and centered source publication on CentOS Stream. This change directly affected projects that rebuilt RHEL one to one from its source code.

In its announcement of 29 June 2023, Rocky Linux explained how it would keep obtaining the sources. For example, the team said it would use Red Hat's free UBI container images and pay-per-use public cloud instances. In other words, Rocky Linux chose to continue rebuilding from RHEL sources.

AlmaLinux took a different path on 13 July 2023. The foundation announced that it would no longer aim to be a 1:1 copy of RHEL. Instead, it would aim to be binary compatible with RHEL. This approach lets AlmaLinux ship bug fixes outside Red Hat's release schedule. According to the announcement, users should see little practical change, and RHEL applications keep running.

What does ABI compatibility mean in practice?

The Application Binary Interface (ABI) defines how a compiled program talks to the operating system and its libraries. This kind of compatibility means you can run a program built for RHEL on AlmaLinux without recompiling it. Consequently, the part that matters most for third-party software stays intact.

A one to one rebuild goes a step further. Here, the goal is to produce each package from the same source and the same patches as its RHEL counterpart. That way, a bug you hit on RHEL shows up the same way on Rocky Linux. Some organizations value this "bug for bug" behavior for testing and certification.

So does this difference matter for your website? For most WordPress, Laravel or Node.js projects, you will not notice it. That is because your application depends on PHP, database and web server versions, not on RHEL itself. However, if you run hardware drivers, an enterprise database or certified commercial software, confirm in writing which distribution the vendor officially supports.

Rocky Linux vs AlmaLinux comparison table

The table below compares the two distributions on points we could verify in official sources. Dates and policies can change over time. Therefore, check each row against the project's current page before you decide.

Looking at the table, you can see that the gap is small, and it really is. The split concentrates in the RHEL approach and governance rows. In the other rows, the two distributions stand in nearly the same place.

How long do updates and the life cycle last?

Both distributions follow the long major release cycle of RHEL. The official AlmaLinux FAQ says the 8.x series receives updates and security patches until 2029, and the 9.x series until 2032. Likewise, the Rocky Linux release docs state that Rocky 9 general support ends on 31 May 2027 and security support on 31 May 2032.

However, people often miss one detail. In both projects, a minor release (such as 9.2) loses support once the next minor release ships. This rule applies in both projects unless you buy an extended support contract. So the 9.x series lives a long time, but you need to move your system to the current minor release regularly. If you delay updates for years, you can fall outside the support scope.

In the Rocky Linux vs AlmaLinux comparison, this point is a tie. In practice, it means a regular maintenance schedule. You start an update with this command:

sudo dnf upgrade --refresh

Always take a backup before you update. For that, you can apply the 3-2-1 approach from our website backup strategy guide. For the 10 series, also check the support horizon on the official release page before you install.

How do version numbers map to RHEL?

Both distributions set their version number by the RHEL minor release. For example, after RHEL 9.4 came out, Rocky Linux and AlmaLinux each released their own 9.4. This mapping makes it easy to tell which package set you are running.

How quickly each project ships a new minor release is not fixed. In some cycles one project ships first, and in others the other one does. For that reason, we avoid claims like "this project always ships first." What matters for you is that you apply an update within a reasonable time once it arrives.

CentOS Stream sits outside this pattern. Stream carries no minor version number and moves as a continuous flow; in other words, it contains changes headed for the next RHEL minor release. We explain that difference in a separate guide. If you want a predictable cycle in production, the numbered minor releases of Rocky Linux and AlmaLinux are easier to track.

To see which release you run, just read this file:

cat /etc/os-release

The NAME and VERSION_ID lines in the output show the distribution name and the minor version. Share this information first in support tickets and panel compatibility checks.

Where do you track security updates?

Both projects publish security fixes through their own errata channels. AlmaLinux uses the ALSA prefix for these advisories, while Rocky Linux uses RLSA. You can follow these records to see which package version closes which CVE.

We make no firm claim about which project ships patches "faster." That is because speed depends on the type of flaw, on when the source code becomes available and on each project's build queue. Speed comparisons you find online often rest on examples from a single period. As a result, a general rule would mislead you.

What matters for you is that you actually apply the updates. Whichever distribution you install, consider these steps:

• Consider enabling automatic security updates with dnf-automatic.
• Add brute force protection for SSH with a Fail2ban setup.
• Pick the right package mirror for faster and more reliable downloads.
• Check your certificate expiry regularly with our SSL checker tool.

Which hosting control panels support each one?

For many site owners on shared hosting or managed VPS plans, panel support is the real question. The official cPanel system requirements page lists AlmaLinux OS, CloudLinux, Rocky Linux and Ubuntu among the operating systems that cPanel & WHM supports. So if you plan to use cPanel, both distributions appear on the official list.

However, the support list can change by version. For example, a panel may start supporting a new major release (such as the 10 series) only after some time. That is why you should check the exact version number on the panel's operating system page before you install. If you plan to use Plesk, DirectAdmin or another panel, run the same check in that vendor's documentation.

On shared hosting, you will also meet CloudLinux often. Its standout features are account isolation and resource limits. We cover that topic in our CageFS account isolation guide. To manage PHP versions from the panel, see our guide on changing the PHP version in cPanel.

Is there a difference in software and repository support?

For most everyday needs, Rocky Linux vs AlmaLinux shows no difference. Both distributions offer the same core package set as RHEL. In addition, the Fedora project's EPEL repository provides extra packages for RHEL and compatible distributions, so you can use it on either one.

Third-party software vendors, however, write their support lists in different ways. Some say "RHEL and compatible distributions," while others name each distribution. For example, a backup agent, monitoring tool or security agent may officially list only one of them. In that case, the software will likely run on the other, but the vendor may decline to help if something breaks.

In theory, the ABI approach lets AlmaLinux drift slightly from RHEL. For instance, a bug fix may land in AlmaLinux before it reaches RHEL. This usually works in your favor, but in environments that need strict certification, you should get vendor approval. On Rocky Linux, the goal is for packages to match the RHEL sources.

In short, if your software list is clear, open the support page of each critical component and search for both distribution names. This five-minute check heads off compatibility arguments later.

What enterprise and commercial support options exist?

Both distributions are free, and community forums, chat channels and documentation help you along. In corporate settings, however, the question "who do I call when something breaks?" matters. At that point, commercial support contracts come into play.

Rocky Linux lists commercial support companies on the "Commercial Support" page of its official site. On the AlmaLinux side, the foundation ecosystem also includes companies that offer support and long-term maintenance. You learn which company offers which service level (SLA) by asking them for a quote directly. We do not promote any specific vendor here.

You can assess whether you need a support contract with these questions:

1. Do you face serious revenue or reputation loss when the server stays down for an hour?
2. Is there someone on your team with Linux system administration experience?
3. Does an audit or client contract require a supported operating system?
4. Does your hosting provider already handle operating system maintenance?

If you answered yes to the last question, you often need no separate contract. A provider that offers managed services usually picks the operating system based on its own support scope, too.

How do you migrate from CentOS or another distribution?

Both projects offer official tools that convert an existing RHEL-compatible system into their own distribution. For Rocky Linux, the tool is the migrate2rocky script. According to the official docs, the script swaps your repositories for Rocky Linux ones, upgrades or downgrades packages as needed and changes the system branding.

For AlmaLinux, the matching tool is the almalinux-deploy script. The AlmaLinux FAQ says this tool makes it simple to migrate from distributions such as CentOS and CentOS Stream. For major version upgrades, the AlmaLinux community also built the ELevate project. ELevate builds on the Leapp utility and helps with major version moves between RHEL derivatives.

Both scripts run with root privileges. Usage looks like the example below; always download the script from the project's official repository:

# Move to Rocky Linux (after downloading the script from the official repository)
sudo bash migrate2rocky.sh -r

# Move to AlmaLinux (after downloading the script from the official repository)
sudo bash almalinux-deploy.sh

For detailed steps and supported source releases, see the Rocky Linux migration guide and the AlmaLinux FAQ. If you force the script on an unsupported source release, the system may end up half converted.

What should you check before migrating?

Conversion scripts work in place; that is, they change the running system directly. So preparation matters more than the script itself. First, record the current state:

cat /etc/os-release
dnf repolist

Then tick off this list one item at a time:

• Take a full system backup or a snapshot through your provider's panel.
• Export your databases separately and test that the backup restores.
• List third-party repositories (panel, monitoring, backup agent) and check their compatibility.
• Ask the panel vendor whether your license will have issues with the new OS name.
• Schedule the job for your lowest traffic window and confirm that console access works.

If possible, set up a test server with the same configuration and try the migration there first. Running your first attempt on a production server is a risky approach you should avoid. After the move, you can also confirm DNS and IP settings with our IP lookup tool.

Will you notice a difference in daily use?

In most scenarios, you will not. When you set up a web server, you install Nginx or Apache, PHP and MariaDB or MySQL with the same commands on both. Likewise, firewalld, SELinux policies and systemd services follow the same logic.

You tend to see the difference in a few moments. First, when an install script checks the distribution name and recognizes only one. Second, when a software vendor answers a ticket with "unsupported operating system." Third, when you search docs and forum answers; both communities are active, but you may find more examples in one, depending on the topic.

Consequently, a blanket verdict such as "which is faster" or "which is more secure" in the Rocky Linux vs AlmaLinux question would not be fair. We see no official basis for expecting a clear performance gap between the two on the same hardware with the same settings. In practice, PHP version, caching and database tuning drive performance far more than the distribution does.

When does a RHEL-compatible distro beat Ubuntu or Debian?

This guide compares two RHEL-compatible distributions, but for some readers the real question comes one step earlier. Ubuntu and Debian are also very common on servers, and cPanel lists Ubuntu among its supported systems too. So when should you pick the RHEL family?

• If your team is used to dnf, RPM, SELinux and firewalld, the RHEL family will feel more natural.
• Your commercial software may officially list only RHEL and compatible distributions; then this family comes first.
• If you want a long, predictable major release cycle, the roughly ten-year horizon of the RHEL family helps.
• If your team knows apt and Debian-based tools well, staying with Ubuntu or Debian carries less risk.

In short, the right family is the one your team knows best. Instead of picking a distribution only because it is popular, first settle who will maintain it and how. If you have no clear answer to that, we suggest you talk to a system administrator before you decide.

Which one should you choose, and what are the criteria?

Because the technical gap in Rocky Linux vs AlmaLinux is small, we suggest tying the decision to a few concrete criteria. The order below offers a practical path for a website or e-commerce stack:

1. Panel support: pick the release that appears on your panel's operating system list.
2. Software vendor: if your critical commercial software officially lists one, choose that one.
3. Team experience: if your team has run one before, its docs and habits already fit it.
4. Support contract: if you buy commercial support, prefer the distribution your vendor specializes in.
5. Closeness to RHEL: if identical behavior matters, Rocky Linux may suit you; if independent bug fixes matter, AlmaLinux may fit better.

If none of these criteria decides it, choosing the distribution your hosting provider offers by default makes sense. That is because the provider has prepared its image, network settings and support team for that distribution. For a broader view of hosting choices, see our guide on how to choose web hosting.

When should you leave this decision to your hosting provider?

To be honest, for most site owners the operating system choice should not be their job. If you use shared hosting, the provider already makes the choice and handles maintenance. In that case, the Rocky Linux or AlmaLinux question is not a practical decision for you.

The same applies if you buy a managed VPS or managed server. Using the distribution your provider supports and keeps current is safer than forcing your own preference. After all, the support team will know that distribution when trouble starts. Additionally, providers tune their ready-made images, network settings and console tools for that distribution. If you install an image of your own, you may lose some of these conveniences.

If you manage your own VPS with root access, the decision is yours. Still, if nobody on your team tracks updates, backups and security settings regularly, consider a managed service seriously. We explain the difference between VPS, VDS and cloud servers in our VPS vs cloud server comparison.

What comes after installation?

Once you pick a distribution, installation and initial hardening come next. We cover AlmaLinux installation step by step in a separate guide, and the steps for Rocky Linux are largely the same. Here is a quick reminder of the order. Most steps use the same commands on both, which also helps teams that move between them.

• Update the system and set the server time zone correctly.
• Disable direct root login over SSH and switch to key-based login.
• Use firewalld to keep only the required ports open.
• Adjust the needed SELinux policies instead of turning SELinux off.
• Schedule automatic backups and regular restore tests.

On the site side, the application layer matters as much as the operating system. If you want to plan your site's design and technical stack together, take a look at our web design service. If you plan to build a custom application or integration, our custom software development page shows you the way.

Rocky Linux vs AlmaLinux: the short summary

Rocky Linux and AlmaLinux are two strong, free and long-lived options that filled the gap CentOS Linux left behind. Both are RHEL compatible, use the same tools and offer similar support horizons for the 8 and 9 series. The split centers on governance and on the approach to RHEL after 2023.

When you decide, look first at panel and software support, then at team experience and support needs. For most web projects, the technical gap is not big enough to change the outcome. Put simply, the "right" distribution is the one you can maintain regularly.

For example, if you buy a managed VPS with cPanel for a small online store, picking the provider's default distribution lets you focus on site speed and security. On the other hand, if you are a software team running your own application, staying on the distribution your team knows keeps maintenance costs down.

Finally, read the official documents we used as sources yourself. AlmaLinux's July 2023 announcement, Rocky Linux's source access announcement and the cPanel system requirements page hold the core facts behind this decision. For commercial support, see the Rocky Linux support providers list.