[CentOS] CentOS upgrade info

Jegadeesh Kumar jegasmile at gmail.com
Tue Feb 17 07:16:31 UTC 2015


Hi team,

I upgrade my OS to 6.6 via yum update. Thanks a lot for your support

On Mon, Feb 16, 2015 at 11:38 PM, Johnny Hughes <johnny at centos.org> wrote:

> On 02/16/2015 10:29 AM, Jegadeesh Kumar wrote:
> > I am working on linux environment. we have centOS servers which is
> running
> > on CentOS 6.2. So far i didn't work on upgrade OS to higher version.
> That's
> > why i asked this question.
> >
> > I know yum upgade will update the packages that installed on the server.
> > Any way  let me try um upgrade and update you.
> >
>
> Every time this comes up, I try to explain how CentOS numbering works
> and how CentOS works in general.
>
> In CentOS, there is CentOS-5, CentOS-6 and CentOS-7.  The minor
> versions, or point releases as we call them, like 5.11, 6.6, 7.0.1406
> ... are all just "POINT IN TIME" releases of the major CentOS branch you
> are on.
>
> These "POINT IN TIME" releases are NOT designed to be consumed out of
> band.  In reality, being on CentOS-6.2 when CentOS-6.3 is available
> means you are missing security updates as 6.3 is just 6.2 and all
> current updates.
>
> If you have any CentOS-6.x release installed and if you run a "yum
> update" without changing anything then you will get the latest update
> set for CentOS-6 .. which is currently 6.6 plus updates.  That is the
> only version of CentOS-6 that is in any way tested and it is the only
> version that might be somewhat secure.  Any other CentOS-6 version is
> missing security updates.
>
> It is just like Windows 7 and Service Packs.  If you have Windows 7, you
> SHOULD have the latest Service Pack installed.  If you don't that is an
> unsupported option and you have security issues.  You can have Windows
> 7, Windows 8 or Windows 10 and be secure, but you must be running the
> latest service packs on each of those to be secure.  If you are running
> Windows 7 without any service packs, that is a very bad thing.
>
> Same for CentOS .. you can be running 5, 6, or 7 .. but you need to be
> running the latest snapshot in that tree to have all the security
> updates .. and unless you (or your provider) are trying really hard,
> running any updates set will take you to the latest version in your branch.
>
> <snip>
>
>
>
>
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