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I had upgraded a VPS server from 12.04 to 14.04, but recently noticed that that the kernel is 2.6.32. I am not an expert Linux user but unfortunately, it is my responsibility.

I have checked how to upgrade kernel, and it seems simple enough. Would appreciate if someone could give me advice on which kernel should I upgrade to (3.17?) and what are the things I should keep in mind while doing it?

Sunil J
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I found a link to a problem like this in another post: I would stress that prior to attempting the upgrades, you should back up your data.

The post suggested that perhaps the linux meta-package had been removed, and that the solution is to re-install this package.

sudo apt-get install linux linux-generic
sudo apt-get update
sudo apt-get dist-upgrade

The original answer goes on to discuss that prior kernels will still be present on your system, and could be accessed through the grub menu.

Charles Green
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