Different kernels on my servers?

[andrew clarke]

On Wed 2015-06-10 07:43:54 UTC-0700, Knute Johnson (ubuntu at knutejohnson.com) wrote:

> So I was getting another server up and running in case my old one died 
> and found they have different kernels.
> 
> Old: Linux knutejohnson 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 
> 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
> 
> New: Linux knute3 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 
> 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
> 
> Both are 14.04.2LTS.  The new one had a kernel held back when I did my 
> update and upgrade so I did a dist-upgrade but it was still a 3.16 
> kernel before that.  The old computer was upgraded from an earlier 
> version of server but that shouldn't stop kernel upgrades? Do I have 
> something set somewhere to prevent my old server from upgrading the kernel?

The 2012 in "Fri Aug 24 16:52:48 UTC 2012" would suggest you're still
running a kernel from Ubuntu 12.04.

I wonder if you've pinned the kernel? There are different ways you
could've done that, explained at https://help.ubuntu.com/community/PinningHowto

Among other things, on the old server I'd run:

dpkg -l | grep linux-image

and look in the first column for "hi" instead of "ii". For example my
local machine has two kernels installed:

ii  linux-image-3.13.0-52-generic               3.13.0-52.86
                  amd64        Linux kernel image for version 3.13.0
		  on 64 bit x86 SMP
ii  linux-image-3.13.0-53-generic               3.13.0-53.89
                  amd64        Linux kernel image for version 3.13.0
		  on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-52-generic         3.13.0-52.86
                  amd64        Linux kernel extra modules for version
		  3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-53-generic         3.13.0-53.89
                  amd64        Linux kernel extra modules for version
		  3.13.0 on 64 bit x86 SMP
ii  linux-image-generic                         3.13.0.53.60
                  amd64        Generic Linux kernel image