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I upgraded my CentOS machines from 6.4 to 6.5. My local machine, after the upgrade, gives this for

uname -r
2.6.32-431.5.1.el6.x86_64

My Linode show this -

uname -r
3.13.7-x86_64-linode38

The output is same for the following

more /etc/redhat-release 
CentOS release 6.5 (Final)

Any idea why?

2 Answers 2

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Linode uses Xen for it's virtualization and for that to be supported it needs a different kernel.
They have their own kernel in the repos they provide to you by default.
So the version will be different from the "stock" CentOS kernel.
See: https://www.linode.com/kernels/

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  • 1
    Unless of course you boot pvgrub. Apr 16, 2014 at 12:25
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uname -r gives the output of the kernel-release, whereas the /etc/redhat-release file contains information about the distro's name and version.

Your scenario shows you have different kernel versions on your systems, but the OS release versions are the same.

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