Hello,

I ran yum update in order to upgrade CentOS 6.5 to 6.6 version but after the command completed the CentOS was upgraded to 6.10.
Is there any possibility to downgrade it to 6.6 (the one that I need) ?

BR,
Ilir

You ran the update, so it did exactly what you told it to. Version 6.x is VERY old, and the latest is 8.x. Why do you 'need' 6.6?? Being so far behind from a software/security standpoint is *NEVER* good.

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I'd either live boot, or instead install clean if you truly need/want 6.6. The only issue is settings and data, but right now an upgrade has already occurred. Bear in mind that version 6.6 is pretty close to EOL End Of Life, and therefore support, plus updates will no longer be available officially.

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Hello,

I need this CentOS release cause I'm upgrading an application which does not support newer CentOS releases but 6.6 version.
Can I revert back to CentOS 6.5 the one that I had before ?

BR,
Ilir

All I have is the same answer, I do not believe downgrades are supported officially. Perhaps they are, but no experience on my end for that.

Quick search engine result, top find, not reviewed in any detail: How to Downgrade RHEL/CentOS to Previous Minor Release

are you sure 6.10 is not supported? At least you can try it (much easier than revert back).
By the way: you could use a backup to restore the original system (if you have a reliable one).

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As said, no. You can do a fresh installation of 6.6, but I find it VERY hard to believe that there is an application that cannot go past 6.6, period.

This has been something that's been said many times here in the past: "I **CAN'T** upgrade because of XXX!!!" If this is for a business, think about what you're actually doing. You're locking yourself into an old, outdated application running on an older OS with well known vulnerabilities that will never, EVER be patched/fixed. What are you going to do when the hardware ages off as well?? Go buy ancient equipment from eBay to keep your business going?? You need to update, period. Whatever app you're running either has a newer version or there is ANOTHER app that does the same thing which DOES support newer OS'es.

What application are you upgrading??

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I do agree with the last two comments.

And I will also add, Welcome to LQ.

An application which requires the older version, raises an eyebrow, and the ensuing questions.

Perhaps instead that it is a combination of the OS version, and an older application version, where migration of the users, data, etc are complicated, not done, or other things.

As a result, if it's things like this, then there are a couple of situations.

First, this is being used for a multi-user situation and does affect multiple users. It is inadvisable to have upgraded the server in advance of proper testing. If this is the testing/staging portion, then please do elaborate more on the applications concerned and people can offer migration strategies.

Second, if this is home use, one family/person, not highly critical, excepting the data, it is likely one system and once again, it is inadvisable to have upgraded without proper staging.

Third, if this is all academic or some other variation, then fine. It does come back to describing the environment and the critical applications being used, to understand a proper migration strategy.

Once again, it is inadequate to just present the problem to your fellow LQ members, state that you have a special need where you aren't yet describing it, and further to slowly reveal more and more requirements and/or restrictions.

Long winded way of saying, I do not believe any of us can help you unless you are able to provide a more complete summary of your server setup and the critical applications which are important.

No one's going to criticize if this is an exploratory question, just you need to indicate this to people.

No one's going to criticize if you happened to have cornered your situation by way of moving too soon on an upgrade and post-discovered a problem. But people cannot provide helpful aid to you if we get brief, unclear updates.

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The install isos for CentOS 6.6 are at:

http://vault.centos.org/6.6/isos/

Note this a follow-on to a previous thread where it was suggested the OP start this new thread. A little more info is in the prior thread.

Aha. Thanks syg00. The application is ArcSight Logger. Appears to be a paid app, and access to their support requires a login.

isaqellari: Recommend you contact ArcSight support to see of the app will run on 6.10. You may be able to find a list of requirements on their support portal.

Hello Guys,

Thank you all for your helpful information and support!

Sorry for any inconvenience caused and posting a thread without more information.
Yes, this is thread which is related with another previous one. I opened a new thread cause one LQ fellow suggested it.

I have to upgrade Arcsight Logger application and the existing one is very old 6.0. In order to go to the last one 7.0 or 7.1 I have to go to every minor upgrade
6.0 -> 6.1 -> 6.2 -> 6.3 .... and so on. So, to upgrade to Logger 6.1, I had to upgrade CentOS from 6.5 to 6.6 cause Logger 6.1 supports only 6.6 CentOS version.
That's why I wanted that upgrade.

I solved the problem reverting from CentOS 6.10 to 6.5 first using a VMware snapshot, then I upgraded to CentOS 6.6 using the corresponding ISO.
Now I can upgrade to Arcsight Logger 6.1.

I have already opened a case with Microfocus support but they provide support only for issues related with Arcsight Logger and nothing if you have any OS related issue.

Best regards,
Ilir

That makes some sense. Surprised you couldn't just do a fresh install of the latest Arcsight, rather than going through all the minor-upgrades.