What system is centos?

Centos means "community enterprise operating system" in Chinese. It is a free open source operating system that can be redistributed; CentOS is one of the Linux distributions, released by Red Hat Enterprise Linux in accordance with open source regulations Compiled from source code, the difference between the two is that CentOS does not contain closed source software. CentOS technical support is mainly provided through the community's official mailing list, forums and chat rooms.

#The operating environment of this tutorial: centos8 system, thinkpad t480 computer.

CentOS is the abbreviation of Community Enterprise Operating System, which means "community enterprise operating system" in Chinese. It is an open source operating system that is free, open source, and can be redistributed.

CentOS is one of the Linux distributions compiled from the source code released by Red Hat Enterprise Linux in accordance with open source regulations. Due to the same source code, some servers with higher stability requirements use CentOS instead of the commercial version of Red Hat Enterprise Linux. The difference between the two is that CentOS does not include closed source software.

CentOS is free. You can use it to build an enterprise-level Linux system environment just like RHEL, but you do not need to pay any fees to RedHat. CentOS technical support is mainly provided through the community's official mailing list, forums and chat rooms.

System features:

1. CentOS can be understood as the community version of the Red Hat AS series. It is completely improved and released on Red Hat AS. Various operations and uses are no different from RHEL.

2. CentOS is completely free, and there is no problem that RED HAT AS requires a serial number.

3. CentOS’s unique yum command supports online upgrades, which can update the system instantly. Unlike RHEL, which requires spending money to purchase support services.

4. CentOS has fixed many RHEL bugs.

5. CentOS version description: CentOS3.1 is equivalent to RED HAT AS3 Update1 CentOS3.4 is equivalent to RED HAT AS3 Update4 CentOS4.0 is equivalent to RED HAT AS4.

Extended Knowledge: History

Among Red Hat's products, there are Red Hat Linux (such as Redhat8, 9) and the enterprise distribution version of Red Hat Enterprise Linux, which can be Network FTP is free to obtain and use,

However, in 2003, redhat com released redhat 9 (rh9 for short), and no longer developed redhat 10, 11..., but turned to redhat enterprise linux (rhel for short) development,

The new rhel 3 requires users to purchase a license first, and redhat com promises to ensure the stability and security of the product. rhel 3 binaries are no longer available for download as part of the redhat service, but the source code is still open.

Its project was superseded by the FedoraProject project, released under the name Fedora Core and made freely available to general users (starting with Fedora 7, "Core" has been removed).

The Linux distribution Fedora Core is updated very quickly. A new version will be released in about half a year. The current version is Fedora 16. This Fedora experiment is very interesting.

New features are added with each version. Successful results will be adopted into the RHEL release. Having said that, an unstable product that is constantly improved and updated is not the best choice for enterprises, and most enterprises will still choose the paid RHEL product.

Most of the software packages that make up RHEL are released based on the GPL agreement, which is what we often call open source software. Because of this, Red Hat also follows this protocol and releases the software packages that make up RHEL.

It follows the GPL agreement, and anyone can re-develop and release it based on the original software composition. CentOS is a Linux distribution that reproduces the components of RHEL based on the RHEL distribution.

The clone version of RHEL is not only CentOS, but also Oracle Linux, Scientific Linux, Fermi Linux, etc. However, there is no guarantee that RHEL corresponding software can run 100% normally on CentOS.

And the repair of security vulnerabilities and software package upgrades correspond to RHEL's paid services and technical support, and there are also delays of days, weeks, and months.

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