What is CentOS and how it is used on servers

Introduction

CentOS was one of the most widely used Linux distributions on servers for many years. Its popularity came from its stability, its close relationship with the Red Hat ecosystem and its frequent use in hosting, VPS and dedicated server environments.

Today it is important to distinguish between the older CentOS Linux and CentOS Stream, because the project changed and that affects support and compatibility decisions.

What CentOS is

CentOS stands for Community ENTerprise Operating System. Historically, it was a free and open-source Linux distribution built from the source code of Red Hat Enterprise Linux.

For a long time, it was used as a stable option for production servers, especially by companies, hosting providers and administrators who wanted a robust operating system without licensing costs.

CentOS Linux and CentOS Stream

Classic CentOS no longer follows the same traditional model. The project evolved into CentOS Stream, a distribution that sits between Fedora and Red Hat Enterprise Linux in the development flow.

That is why, before installing CentOS on a new server, you should review which version you are using, whether it still has support and whether it is compatible with your control panel, applications or required software.

Many hosting environments now also use RHEL-compatible alternatives such as AlmaLinux or Rocky Linux.

Main characteristics

• Stability for web servers, databases, email and business applications.
• Enterprise ecosystem closely related to RHEL.
• Large community with years of documentation and shared practices.
• Stable repositories and packages, often expanded with options such as EPEL.

Common hosting uses

CentOS has been used for:

1. Web servers with Apache, Nginx or LiteSpeed.
2. Hosting control panels.
3. VPS and dedicated servers.
4. MySQL or MariaDB databases.
5. Development and testing environments.
6. Enterprise infrastructures.

Useful tips

• Review the installed version and its real support status.
• Do not keep a production server running without security patches.
• Before migrating, prepare a full backup and a maintenance window.

Frequently asked questions

Is CentOS still recommended for hosting

It depends on the version and the use case. For new installations, it is best to review options with active support and control-panel compatibility.

Is CentOS the same as Red Hat Enterprise Linux

No. It was historically very close to RHEL, but it was not the same product and did not provide the same commercial support.

What can I use if my software no longer supports CentOS

Many deployments move to AlmaLinux, Rocky Linux, Debian or Ubuntu Server, depending on compatibility and technical requirements.

Conclusion

CentOS was an important part of the hosting and Linux server world. However, because of project changes and version life cycles, it is essential to review support, compatibility and security before continuing to use it or deploying it on a new server.