1. The difference between free and paid: redhat is a paid version, and centos is a free version;

2. Redhat provides commercial solutions, while centos does not.

3. CentOS is one of the Linux distributions. It is compiled from the source code released by Red Hat Enterprise Linux in accordance with open source regulations. It uses the same source code as RedHat.

Extended information:

CentOS (Community Enterprise Operating System, Chinese meaning: community enterprise operating system) is one of the Linux distributions. It is compiled from source code released by Red Hat Enterprise Linux in accordance with open source regulations. 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 does not contain closed source software.

CentOS 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 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

Reference: Baidu Encyclopedia-centos? Baidu Encyclopedia-Red Hat