In the world of enterprise Linux distributions, CentOS was once the go-to option for users who wanted the power of Red Hat Enterprise Linux (RHEL) without the licensing fees. Many companies and developers are searching for a reliable substitute, though, as CentOS 7 will reach its end-of-life (EOL) in June 2024 and CentOS 8 was previously discontinued in favor of CentOS Stream. One of the most well-known substitutes is AlmaLinux 8, which provides a free, open-source, RHEL-compatible experience. To assist you in making an informed choice, we will compare AlmaLinux 8 versus CentOS 7 in this article, along with a number of technical and functional aspects.
1. Background and Overview
CentOS 7:
- Date of Release: July 7, 2014
- Predicated on: RHEL 7
- End-of-Life status as of June 30, 2024
- Version of the kernel: 3.10.x
- Package Manager: YUM (Modified Yellowdog Updater)
Because of its long support cycle, binary compatibility with RHEL, and rock-solid stability, CentOS 7 was adored. But its kernel and software stack are now outdated.
AlmaLinux 8:
- Initial Release: March 2021
- Based On: RHEL 8
- Current Version: AlmaLinux 8.x (as of 2025)
- Status: Active, with long-term support
- Kernel Version: 4.18+
- Package Manager: DNF (Dandified YUM), modular support
AlmaLinux is a people-driven, enterprise-grade Linux distro sponsored by CloudLinux & governed by the AlmaLinux OS Base. Like CentOS used to do for RHEL 7, it provides a 1:1 binary replacement for RHEL 8.
2. Enhancements to Performance and Kernel
Compared to CentOS 7, AlmaLinux 8 is significantly faster and more advanced:
| Feature | CentOS 7 | AlmaLinux 8 |
|---|---|---|
| Kernel | 3.10.x | 4.18+ |
| Cgroup version | v1 | v2 (default) |
| Filesystem support | ext4, XFS | ext4, XFS, better Btrfs support |
| Performance tuning | Manual | Tuned profiles available |
The updated AlmaLinux kernel offers:
- Better support for hardware
- Improved resource management and scheduling
- Improved memory protection and security
Better performance in virtualization, networking, and storage settings results from this.
3. Availability of Software
Because AlmaLinux 8 supports modular repositories, you can install different software versions (like PHP 7.2 and PHP 8.0) side by side.
| Package | CentOS 7 Version | AlmaLinux 8 Version |
|---|---|---|
| Python | 2.7 | 3.6, 3.8 (via AppStreams) |
| PHP | 5.4 | 7.2, 7.4, 8.x |
| GCC | 4.8 | 8.2+ |
| OpenSSL | 1.0.2 | 1.1.1 |
This makes AlmaLinux a better choice for developers who want access to modern programming languages, security libraries, and tools.
4. Security benefit
CentOS 7:
- SELinux: Older policies are supported
- Limited crypto deprecations
- CVEs: Due to EOL, many recent vulnerabilities remain unpatched.
AlmaLinux 8:
- By default, SELinux is in enforcing mode
- Support for FIPS 140-2 compliance
- Patch management and timely security updates
- Built-in audit tools and OpenSCAP
AlmaLinux 8 is more actively maintained, more secure by design, and prepared for deployments that are ready for compliance.
5. System Administration & Tools
AlmaLinux 8 brings modern system tools that make a sysadmin’s life easier:
| Feature | CentOS 7 | AlmaLinux 8 |
|---|---|---|
| Package Manager | YUM | DNF |
| Firewall | iptables | firewalld (nftables backend) |
| Networking | ifcfg scripts | nmcli, nmtui, NetworkManager |
| System init | systemd | systemd (newer version) |
| Cockpit | Not available by default | Web-based system management interface included |
DNF, for instance, offers best dependency resolution & performance than YUM. Additionally, AlmaLinux supports Cockpit, a web-based admin panel for controlling users, storage, and services as well as tracking CPU usage.
6. The Path of Migration
You have two primary choices if you’re still using CentOS 7:
- Switch straight to AlmaLinux 8.
- Reinstall and adjust your system.
A migration script (ELevate) provided by AlmaLinux enables in-place upgrades from CentOS 7 to AlmaLinux 8. It is complicated, though, and should not be used on vital systems until thoroughly tested.
7. Use Cases
When to Use CentOS 7 (while still supported):
- Legacy systems that depend on older libraries (e.g., legacy PHP or Java)
- Environments where stability trumps modern features
When to Use AlmaLinux 8:
- New deployments requiring RHEL compatibility
- Systems that need access to modern dev stacks
- Enterprises that require long-term support and security
8. Community & Support
CentOS 7:
- There are still active community forums
- No official patches or updates after EOL
- Absence of upstream assistance
AlmaLinux 8:
- The AlmaLinux OS Foundation supports.
- kept up to date
- CloudLinux-supported, with enterprise support accessible
- robust community presence across community forums, Reddit, and GitHub
9. Final Criteria for The victor
| Criteria | Winner |
|---|---|
| Performance | AlmaLinux 8 |
| Security | AlmaLinux 8 |
| Package Ecosystem | AlmaLinux 8 |
| Support Lifecycle | AlmaLinux 8 |
| Legacy Software | CentOS 7 |
The time to plan your passage is now if you’re still running CentOS 7. Although CentOS 7 was dependable and long-lasting, AlmaLinux 8 is the secure, future-proof, and actively maintained replacement for enterprise Linux environments.
Conclusion
In the battle between AlmaLinux 8 vs CentOS 7, the choice is clear for new and modern workloads: AlmaLinux 8 offers better performance, modern tools, and long-term support. For legacy methods, CentOS 7 may hang on for a bit, but its days are numbered.
Step to take: Begin testing AlmaLinux 8 in staging settings. If you’re planning an in-place upgrade from CentOS 7, think about using automation scripts for deployment and monitoring ELevate.
If you would like a detailed migration guide or a comparison with Oracle Linux or Rocky Linux, please let me know!
