Seeking to understand updates and CentOS versions

Issues related to applications and software problems and general support
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kauer
Posts: 16
Joined: 2020/05/03 07:47:30

Seeking to understand updates and CentOS versions

Post by kauer » 2020/06/16 22:52:18

I'm not sure how CentOS versioning works. I installed CentOS8.1.1911 a month or so ago. Immediately after that I applied all available updates. There were around fifty or sixty things that got updated as I recall.

Now I see that CentOS8.2.2004 has come out, and yum check-updates shows around 600 updates waiting :-)

My question is this: If I apply all those updates, do I effectively have CentOS8.2.2004 installed?

A not unrelated question is, what level of confidence can I have that installing those updates won't break anything? Myinstall is plain-vanilla, no special drivers, but I do trun a coupl of KVM virtuals on it.

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jlehtone
Posts: 2940
Joined: 2007/12/11 08:17:33
Location: Finland

Re: Seeking to understand updates and CentOS versions

Post by jlehtone » 2020/06/16 23:09:26

kauer wrote:
2020/06/16 22:52:18
My question is this: If I apply all those updates, do I effectively have CentOS8.2.2004 installed?
Yes.
kauer wrote:
2020/06/16 22:52:18
A not unrelated question is, what level of confidence can I have that installing those updates won't break anything?
Red Hat made and did publish RHEL 8.2. They have confidence that it won't break the systems of their paying customers.
CentOS 8 is derived from RHEL 8. That process does not introduce horrific amount of novel bugs.

The Release Notes of CentOS 8.2.2004 and RHEL 8.2 should list known issues.

gerry666uk
Posts: 52
Joined: 2020/02/10 19:06:06

Re: Seeking to understand updates and CentOS versions

Post by gerry666uk » 2020/06/17 17:45:21

Let's say you install CentOS 8.1 and it's fully up-to-date.
You then run check-update later the same day, and notice there are no updates.
Why are there no updates? Because it's only a few hours later and nothing has been released yet.
But, you then run check-update a week later, and suddenly there are 20 updates, e.g. security fixes.
You decide to install all 20 updates, and now you are fully up-to-date.
BUT, you are still on CentOS 8.1 at that point.

A few weeks later (now) they release CentOS 8.2
If you now run check-update and install everything, your o/s will suddenly become CentOS 8.2

In other words, updates can happen between minor versions of CentOS.

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