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> > > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >