You are comparing CentOS vs AlmaLinux because internal docs still say “standardize on CentOS”—but CentOS Linux, the free rebuild that powered millions of servers, is end of life. What remains under the CentOS name is CentOS Stream: the upstream branch where RHEL minors are developed. AlmaLinux is what most of those fleets actually wanted after 2021: a free, community-governed, RHEL-compatible Enterprise Linux for production—the spiritual successor to CentOS Linux, not a rename of CentOS Stream.
This guide compares CentOS Stream 9 and 10 with AlmaLinux 9 and 10 in mid-2026, explains migration from legacy CentOS Linux 7/8, and covers hosting, support dates, and when Stream still makes sense. Figures come from centos.org, almalinux.org, and the AlmaLinux Wiki—confirm on staging before you touch production.
Quick answer: CentOS vs AlmaLinux in 2026
Pick AlmaLinux 9 or 10 when you need a production Enterprise Linux server after CentOS Linux—dnf, SELinux, RHEL ABI compatibility, long published support windows, and cPanel/WHM on current branches.
Pick CentOS Stream 9 or 10 when you develop, test, or contribute to the RHEL pipeline—previewing the next RHEL minor release—not when you want “install once and forget like CentOS 7.”
Do not install CentOS Linux 7 or 8 in 2026—they are EOL.
| Pick this | Best reason |
|---|---|
| AlmaLinux 10 | New EL10 builds; security support to 2035-05-31 |
| AlmaLinux 9 | Mature 9.x fleet; security support to 2032-05-31 |
| CentOS Stream 10 | RHEL 10 upstream preview; EOL 2030-05-31 |
| CentOS Stream 9 | RHEL 9 upstream preview; EOL 2027-05-31 |
Related: CentOS vs Red Hat, AlmaLinux vs Rocky Linux, AlmaLinux vs Ubuntu.
CentOS vs AlmaLinux at a glance
| Topic | CentOS Stream 9/10 | AlmaLinux 9 | AlmaLinux 10 |
|---|---|---|---|
| Role vs RHEL | Upstream preview | Downstream RHEL-compatible rebuild | Same |
| Replaces CentOS Linux? | No (different product) | Yes (primary intent) | Yes |
| Governance | CentOS Project / Red Hat ecosystem | AlmaLinux OS Foundation (501(c)(6)) | Same |
| Cost | Free | Free | Free |
| Compatibility target | Next RHEL minor content | ABI compatible with RHEL | ABI compatible with RHEL |
| Update cadence | Continuous composes | Minor releases after RHEL GA | Same |
| Stream branch EOL | 9: 2027-05-31; 10: 2030-05-31 | — | — |
| Alma active support ends | — | 31 May 2027 | 31 May 2030 |
| Alma security support ends | — | 31 May 2032 | 31 May 2035 |
| Package tool | DNF / RPM | DNF / RPM | DNF / RPM |
| cPanel/WHM (v134+, 2026) | Not primary matrix | Supported (8/9/10) | Supported |
| In-place from CentOS Linux 8 | Historical Stream swap only | almalinux-deploy | ELevate / fresh install paths |
Sources: centos.org/cl-vs-cs, CentOS download, AlmaLinux release notes, AlmaLinux FAQ.
What “CentOS” means—and where AlmaLinux fits
CentOS Linux is gone
In December 2020, the CentOS Project moved investment from CentOS Linux to CentOS Stream. Per Comparing CentOS Stream and CentOS Linux:
| Release | End of life |
|---|---|
| CentOS Linux 7 | 2024-06-30 |
| CentOS Linux 8 | 2021-12-31 |
| CentOS Stream 8 | 2024-05-31 |
CentOS Linux was a downstream rebuild of released RHEL—what hosting panels, ISV installers, and yum-era runbooks meant by “CentOS.”
CentOS Stream is upstream
CentOS Stream is the upstream, public development branch for RHEL. Updates land as composes are ready—previewing upcoming RHEL minor releases, not mirroring a frozen RHEL minor like old CentOS Linux.
AlmaLinux is the production-oriented successor
AlmaLinux launched in 2021 after the CentOS shift. The AlmaLinux OS Foundation is a 501(c)(6) nonprofit; engineering is community- and sponsor-backed.
Per the AlmaLinux FAQ:
- AlmaLinux is ABI/binary compatible with RHEL—software and kernel modules built for RHEL should run on AlmaLinux.
- AlmaLinux is not 1:1 with CentOS Stream—Stream may track ahead of Alma at points.
- AlmaLinux typically releases within a day or two of upstream RHEL minors, with updates often within 24 hours.
CentOS Stream vs AlmaLinux: upstream vs production rebuild
| Dimension | CentOS Stream | AlmaLinux |
|---|---|---|
| Pipeline position | Before RHEL minor GA | After RHEL sources—rebuild for operators |
| Best for | SIG work, IHV/ISV preview testing | Production VPS, databases, panels |
| Update risk | Continuous preview churn | Released-minor stability target |
| Red Hat positioning | RHEL development platform | Community RHEL-compatible OS |
| Match old CentOS Linux behavior | No | Closest free option |
Red Hat Developer documentation states CentOS Stream is not designed for enterprise production the way RHEL is—AlmaLinux exists precisely for teams that still want free EL production without Stream’s upstream role.
Support timelines
AlmaLinux
| Major | Active support until | Security support until |
|---|---|---|
| AlmaLinux 9 | 31 May 2027 | 31 May 2032 |
| AlmaLinux 10 | 31 May 2030 | 31 May 2035 |
| AlmaLinux 8 | Active support ended May 2024 | 31 May 2029 |
CentOS Stream
Per centos.org/download and cl-vs-cs:
| Stream major | End-of-life |
|---|---|
| CentOS Stream 9 | 2027-05-31 |
| CentOS Stream 10 | 2030-05-31 |
Stream EOL aligns with RHEL full support for that major—not Alma’s separate security-support calendar. Plan major upgrades (9 → 10) as projects on either side.
Migration from CentOS to AlmaLinux
CentOS Linux 8 → AlmaLinux (common path)
almalinux-deploy converts many EL8/EL9 systems—including CentOS Linux 8—in place by swapping repositories and syncing packages.
Before you run it:
- Snapshot or backup the VM
- Test on staging
- Verify cPanel, ISV, or kernel module support after conversion
CentOS Linux 7 → AlmaLinux
There is no single command from CentOS 7 to AlmaLinux 10. Use multi-step tooling such as ELevate—for example CentOS 7 → intermediate EL → AlmaLinux—or reinstall and restore data. The ELevate guide notes one-step limits and documents Elevating CentOS 7 to AlmaLinux 10 as a split process.
CentOS Linux 8 → CentOS Stream 8 (historical only)
CentOS documented a conversion to Stream 8 (now EOL):
sudo dnf swap centos-linux-repos centos-stream-repos
sudo dnf distro-syncThat path moved hosts toward upstream Stream, not toward AlmaLinux. In 2026, CentOS Linux 8 → AlmaLinux 8 via almalinux-deploy is the direct production path; jumping to AlmaLinux 9 or 10 requires ELevate or a fresh install.
CentOS Stream → AlmaLinux
Moving from Stream to AlmaLinux changes your pipeline role—from upstream preview to RHEL-compatible rebuild. Treat it as a planned migration: backup, staging test, maintenance window—not a casual Friday dnf swap.
| From | Practical AlmaLinux target | Tool |
|---|---|---|
| CentOS Linux 8 | AlmaLinux 8 first | almalinux-deploy |
| CentOS Linux 8 → AlmaLinux 9/10 | Multi-step upgrade or fresh install | ELevate / rebuild |
| CentOS Linux 7 | AlmaLinux 8/9/10 via multi-step path | ELevate / fresh install |
| CentOS Stream 9 | AlmaLinux 9 | almalinux-deploy with --downgrade + staging |
| Rocky Linux 8/9/10 | Matching AlmaLinux major | almalinux-deploy |
Rocky-focused steps: migrate CentOS to Rocky Linux (compare with Alma before you choose).
Package management and day-to-day administration
Both Stream and AlmaLinux use DNF, RPM, SELinux, and firewalld—the Enterprise Linux stack you know from CentOS Linux.
| Task | CentOS Stream | AlmaLinux |
|---|---|---|
| Install | sudo dnf install nginx |
Same |
| Release file | /etc/centos-release |
/etc/almalinux-release |
| Extra repos | EPEL, CRB patterns | EPEL, CRB/PowerTools |
| Roll back updates | DNF history | Same |
Verify what you installed:
# AlmaLinux
cat /etc/almalinux-release
uname -r
# CentOS Stream
cat /etc/centos-release
uname -rTypical shapes:
AlmaLinux release 9.8 (Olive Jaguar)
5.14.0-687.el9.x86_64
CentOS Stream release 9
5.14.0-*.el9.x86_64Command reference: DNF command in Linux. Firewall: firewalld cheat sheet.
Web hosting and cPanel
Many CentOS Linux fleets were shared hosting servers. In 2026:
- AlmaLinux 8, 9, and 10 are supported on cPanel’s current supported operating systems matrix.
- CentOS Linux is EOL—do not build new panel servers on it.
- CentOS Stream is not the usual cPanel target matrix item.
- Rocky Linux is not supported on cPanel 134+ (January 2026)—many Rocky shops moved to AlmaLinux via almalinux-deploy.
| Hosting scenario | Practical pick |
|---|---|
| New cPanel dedicated server (2026) | AlmaLinux 9 or 10 |
| Legacy CentOS 7 cPanel | Migrate via ELevate or reprovision to Alma |
| Dev preview of next RHEL PHP/nginx stack | CentOS Stream lab—not panel production |
Details: AlmaLinux vs Ubuntu for panel + cloud split; AlmaLinux vs Rocky Linux for Rocky-specific gaps.
Architectures and EL10 hardware
Both AlmaLinux and CentOS Stream ship x86_64, aarch64, ppc64le, and s390x on current majors per project docs.
The EL10 split that matters for older metal:
| EL10 x86_64 | AlmaLinux 10 | CentOS Stream 10 |
|---|---|---|
| Default baseline | x86_64 + x86_64_v2 images available | x86_64_v3 class |
| Older pre-v3 CPUs | Alma v2 media may work | Verify Stream/RHEL v3 requirement |
If you still run pre-Haswell-era servers, check CPU baselines before standardizing on EL10—see AlmaLinux vs Rocky Linux for the full arch table.
Workload guide: CentOS Stream vs AlmaLinux
| Workload | CentOS Stream | AlmaLinux |
|---|---|---|
| Replace CentOS Linux production | Poor fit | Strong fit |
| cPanel / WHM new builds | Not primary | Strong fit |
| RHEL ecosystem contribution | Strong fit | Secondary |
| ISV “certified on RHEL” apps | Test on Stream; deploy on Alma/RHEL | Strong fit |
| SAP / Oracle strict RHEL contract | Use RHEL subscription | Verify matrix |
| Kubernetes / nginx / PostgreSQL | Good for preview labs | Strong fit |
| CI matching released RHEL minor | Use Alma or RHEL | Strong fit |
| CI previewing next RHEL minor | Strong fit | Lagging until rebuild |
Who should choose CentOS Stream vs AlmaLinux
Choose AlmaLinux when
- You are migrating from CentOS Linux 7/8 to a supported free EL production base.
- You run cPanel, DirectAdmin, or EL hosting playbooks written for downstream clones.
- You want RHEL ABI compatibility with published Alma support dates—not Stream preview cadence.
- Your team types
dnfand expects released-minor stability.
Choose CentOS Stream when
- You contribute to Enterprise Linux SIGs or test what RHEL will ship next.
- You partner with Red Hat on upstream validation—not operating a 10-year unmaintained hosting fleet.
- You explicitly need visibility ahead of RHEL minor GA.
Choose RHEL instead of both when
- Contracts require Red Hat subscriptions, Insights, or Convert2RHEL from legacy CentOS—see CentOS vs Red Hat.
Common mistakes
- Treating CentOS Stream as “the new CentOS Linux” — use AlmaLinux (or Rocky) for production clone behavior.
- Staying on CentOS Linux 7 in 2026 — EOL June 2024; migrate urgently.
- Assuming AlmaLinux equals CentOS Stream — Alma FAQ says they are not 1:1; Stream can run ahead.
- Skipping staging before almalinux-deploy — repo swaps can break panels and custom kernels.
- Picking “AlmaLinux” without a major version — ISV matrices care about 9 vs 10.
- Using Stream for new cPanel servers — AlmaLinux is the supported EL path.
- Expecting CentOS Linux 7 → AlmaLinux 10 in one step — plan ELevate multi-hop or reinstall.
Summary
CentOS Linux—the downstream free rebuild—is end of life. CentOS Stream is the upstream RHEL development branch with continuous updates through Stream 9 (EOL 2027-05-31) and Stream 10 (EOL 2030-05-31). AlmaLinux 9 and 10 are the community-owned, RHEL ABI-compatible operating systems most teams wanted when CentOS Linux disappeared—production-oriented, free, with support through 2032 (9) or 2035 (10) and cPanel on current branches.
Choose AlmaLinux to replace CentOS Linux on servers. Choose CentOS Stream to preview and influence RHEL. Do not greenfield EOL CentOS Linux. Run almalinux-deploy or ELevate on staging, validate your panel and ISV stack, then schedule production migration.
Official references: CentOS Project, CentOS cl-vs-cs, AlmaLinux, AlmaLinux FAQ, AlmaLinux release notes, almalinux-deploy, ELevate guide.
On-site next steps: CentOS vs Ubuntu, CentOS vs Red Hat, AlmaLinux vs Rocky Linux, AlmaLinux vs Ubuntu, Red Hat vs Rocky Linux.
