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چطور ورژن Centos را در بدست بیاوریم.

How to Check CentOS Version Number

The easiest way to check your CentOS version is via the command line.

Login to your CentOS server using SSH and run the following command:

cat /etc/centos-release

You may also use:
cat /etc/redhat-release

This should return the following CentOS version information:
CentOS release 6.2 (Final)

CentOS version history follows that of Red Hat but it could be delayed, which is just one of a few things you should know before running a CentOS server.

Let’s break this down:

CentOS – This is your Linux distribution. This may seem obvious but in doing outsourced support, we sometimes find surprises.

6.2 – There are two parts of this version number. 6 is the major release version for this Linux distribution. The 2 represents the second update for this release. Red Hat, Fedora and CentOS Linux distributions use this version system.
Kernel Versions

Know that you know your CentOS version, you may also want to check what kernel is running on your CentOS server. You can check which kernel you are using by running:
uname -a

This will return:
Linux office.rackaid.net 2.6.32-220.2.1.el6.x86_64 #1 SMP
Fri Dec 23 02:21:33 CST 2011 ×86_64 ×86_64 ×86_64 GNU/Linux

If you use 3rd party repos, make sure you add the appropriate i386 or x86_64 bit versions of software.
You may notice that this is not the latest kernel, but this it typical. However, I don’t recommend picking a Linux distribution just because it runs the latest kernel. The most important thing is that you are running the latest kernel for our CentOS server.

This is the kernel that is actually running on your server. There you could be newer kernels installed on your CentOS server but not actually running. You can list the installed kernels using yum or rpm. You can then see which kernel will start on boot by checking your /etc/grub.conf.

If you run a CentOS server, keeping track of CentOS versions is important. The best way to do this is to follow the CentOS web site so you can stay on top of your chosen Linux distribution.

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