What does centos do?

What does centos do?

CentOS (Community Enterprise Operating System, Chinese means community enterprise operating system) is one of the Linux distributions. It is derived from the source code released by Red Hat Enterprise Linux in accordance with the open source code regulations. compiled. Because it comes from the same source code, some servers that require high stability use CentOS instead of the commercial version of Red Hat Enterprise Linux. The difference between the two is that CentOS is completely open source.

Recommended: "centos Tutorial"

Introduction

CentOS is a freely available source based on Red Hat Linux An enterprise-grade Linux distribution of code. Each version of CentOS is supported (via security updates) for ten years. New versions of CentOS are released approximately every two years, and each version of CentOS is updated regularly (approximately every six months) to support new hardware. In this way, a secure, low-maintenance, stable, highly predictable, and highly repeatable Linux environment is established. CentOS is the abbreviation of Community Enterprise Operating System.

CentOS is the product of recompilation of RHEL (Red Hat Enterprise Linux) source code, and many known bugs have been corrected on the basis of RHEL. Compared with other Linux distributions, its stability is trustworthy.

CentOS announced in early 2014 that it would join Red Hat.

What remains unchanged after CentOS joins Red Hat is:

1. CentOS continues to be free of charge

2. The sponsored content-driven network center remains unchanged

3. Bug, Issue and emergency handling strategies remain unchanged

4. Red Hat Enterprise Linux and CentOS firewalls also still exist

The changes are:

1. We Work for Red Hat, not RHEL

2. Red Hat provides sponsorship of build systems and initial content distribution resources

3. Some development resources including source code will be easier to obtain

4. Avoided some legal issues with Red Hat

Latest version

The latest version is CentOS 8.1.1911.

Main improvements in upstream RHEL 7:

The kernel is updated to 3.10.0; supports Linux containers (Docker), Open VMware Tools and 3D images can be installed and used, and Open JDK7 is used as the default JDK , LVM snapshots of ext4 and XFS, switch to systemd, firewalld and GRUB2, XFS as the default file system, iSCSI and FCoE in the kernel space, support PTPv2, support 40G network cards, etc.

Features

1. CentOS can be understood as the Red Hat AS series! It is completely improved upon Red Hat AS and released! Various operations and uses are no different from RED HAT!

2. CentOS is completely free, and there is no problem that RED HAT AS4 requires a serial number.

3． CentOS's unique yum command supports online upgrades, which can update the system instantly. Unlike RED HAT, which requires money to purchase support services!

4. CentOS has fixed many RHEL BUGs!

5. CentOS version notes: 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

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