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I'm running Ubuntu 10.04LTS on my cloud servers. To update and upgrade the packages available, I did:

sudo apt-get update
sudo apt-get upgrade

... followed by a reboot.

The upgrade shows 2.6.32-41-server kernel image installed, and referenced in the /boot directory. Yet after the reboot, the motd reports still running -31-server. The grub menu.lst doesn't even include the -41 patch of the kernel.

I didn't expect this based on my experience with the desktop edition. What am I missing here?

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Did the upgrade show the kernel package in the "will be upgraded", list, or a list saying it had been held back? Try apt-get dist-upgrade instead? –  Shane Madden Jul 22 '12 at 17:38
There was no "held back" message, so I had the impression it would be upgraded. It actually installed the directory in /boot for the newer kernel, but didn't enable it for boot. No error messages. –  Mojo Jul 22 '12 at 21:40
Gotcha. Which cloud service is it? And does running update-grub help at all? –  Shane Madden Jul 22 '12 at 21:50
Rackspace. I tried update-grub, and it left 2.6.32-31-server in place. Reading the comments in the file now leads me to believe that this is the kernel version that's blessed by the hypervisor, and I really shouldn't touch it. :) –  Mojo Jul 23 '12 at 1:19
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