What is the difference between RHEL and CentOS?

What is the difference between RHEL and CentOS?

1. Redhat is a paid version, and CentOS is a free version;

2. Redhat provides commercial solutions, but CentOS does not;

3. CentOS is independent Some yum commands support online upgrades and can update the system instantly, but redhat charges a fee.

RHEL

RHEL generally refers to Red Hat Enterprise Linux

Red Hat on November 11, 2010 Released the official version of Enterprise Linux 6, which includes more powerful scalability and virtualization features, and comprehensive improvements in system resource allocation and energy saving. Theoretically, RHEL can use 64,000 cores in a single system. In addition to better multi-core support, RHEL 6 also inherits support for new chip architectures from the RHEL 5.5 version, including Intel's Xeon 5600 and 7500, and IBM's Power7. The new version brings a completely rewritten process scheduler and a new multi-processor locking mechanism, and takes advantage of NVIDIA graphics processors to make major upgrades to GNOME and KDE, and new system security service daemon (SSSD) functions. Allows for centralized identity management, while SELinux's sandboxing capabilities allow administrators to better handle untrusted content. The new components built into RHEL 6 include GCC 4.4 (including backward compatibility with RHEL 4 and 5 components), OpenJDK 6, Tomcat 6, Ruby 1.8.7 and Rails 3, PHP 5.3.2 and Perl 5.10.1, and the database front end includes PostgreSQL 8.4 .4, MySQL 5.1.47 and SQLite 3.6.20. After two delays, Red Hat officially released RHEL5 on March 14, 2007. RHEL 5 will be the fourth important version release of Red Hat's commercial server operating system version. Red Hat is planning to release RHEL 5. Over two years, major changes include the upgrade of the Linux kernel from 2.6.9 to 2.6.18, support for Xen virtualization technology, cluster storage, etc.

CentOS Features

1. CentOS can be understood as 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 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

Recommended tutorial: "CentOS》

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