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I have tried executing yum update command but it only took me from 5.11 to 6.x. I need the server to be running CentOS 6.x for nagiosxi. 

[root@nagiosxi network-scripts]# uname -a
Linux nagiosxi.inl.gov 2.6.18-371.8.1.el5 #1 SMP Thu Apr 24 18:23:07 EDT 2014 i686 i686 i386 GNU/Linux
Wajahat Makki
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  • Have you looked at the CentOS/RedHat documentation? – Etan Reisner May 11 '15 at 20:28
  • Yes i have, it wasn't really clear as to how to do it – Wajahat Makki May 11 '15 at 20:30
  • Which documentation specifically? It likely wasn't clear because that's generally not how they recommend doing things. Though there are (and have been) semi-official ways of doing it since CentOS 6 I believe. – Etan Reisner May 11 '15 at 20:36
  • Because you are upgrading to a major version, the safest way is to run preupgrade. Here's what centos has to offer http://wiki.centos.org/TipsAndTricks/CentOSUpgradeTool – alvits May 11 '15 at 20:46

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As you probably know, CentOS is based on RedHat so the same rules apply for both.

In place upgrades between 4, 5, and 6 are not supported by RedHat (and thus CentOS). The only supported upgrade path is from 6 to 7. The expectation is that an upgrade path will continue in future releases.

With that said, there is a way to upgrade from 5 to 6 but it is not supported by RedHat so be careful with how you use it.

The link is: In place upgrade

acer123
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