Install now, upgrade later?

ekul taylor ekul.taylor at
Fri Mar 19 21:35:05 GMT 2010

uname -r
which will tell you the specific build of the kernel you are running.  If
the PAE kernel is in use it will have -pae in the name.  if you don't see
that you'll need to install the linux-server package.

You can also run free -m as a check to ensure all your ram is being
addressed.  However much you think there is should match the total column in
MB.  If it doesn't something isn't quite working.

On Fri, Mar 19, 2010 at 5:07 PM, David Groos <djgroos at> wrote:

> Thanks Ekul for the further info, I get it now.  I think I'll use solution
> #1 below--sounds like it is doable and will help out with what I need for
> these last couple of months of school then over summer power-up with a new
> Lucid install.  I'm pretty sure I'm currently using the server install.  How
> can I tell?
> David
> On Fri, Mar 19, 2010 at 8:35 AM, ekul taylor <ekul.taylor at>wrote:
>> The 32/64 bit question is very complicated.  Hopefully I can help.
>> Any AMD Opteron or Intel Xeon server made in the past few years has
>> support for running 32 bit and 64 bit code (even at the same time).  So you
>> could clone your existing server and it would work fine but you might not be
>> able to take advantage of all of your RAM.
>> If you have more then 4 GB of RAM you have 3 options to use it all:
>> 1. Clone your 32 bit server install but install the linux-server package
>> if it isn't already used.  This kernel is PAE enabled which is something
>> Intel developed to let 32 bit processors address more then 4 GB of RAM.  It
>> does have slight performance issues and no one process can address more then
>> 4 GB of RAM but for a terminal server this isn't important.
>> 2.  Clone your 32 bit server but install and run a 64 bit kernel.  This
>> can be tricky dependency-wise so I wouldn't recommend it so I won't outline
>> the many steps here.
>> 3.  Install a 64 bit version of edubuntu and reuse
>> your configuration files from your old server.  It's pretty easy to do since
>> except for /etc/modules.d and /etc/modprobe.conf none of the config files
>> are about the kernel.  You do have to build your chroot a little differently
>> if you use this option as thin clients will almost certainly need a 32 bit
>> boot environment.  To do this you use the command:
>> ltsp-build-client --arch i386
>> instead of just ltsp-build-client.  This is what I option I would use when
>> installing lucid but if you're just going to be using karmic for a few
>> months option 1 will involve the least setup.
>> On Fri, Mar 19, 2010 at 9:11 AM, David Groos <djgroos at> wrote:
>>> Confusion compounds...
>>> the one thing I might have understood...
>>>> If you install this kernel in Jaunty/Karmic, then you can access more
>>>> than 4 Gb of RAM while having 32 bit systems/OS:
>>>> So you can do that either in the old or the new server.
>>> You're saying that:
>>> --I could install the above kernel onto my current 32 bit hardware.
>>> --then I could either:
>>> --------install up to 64 Gb RAM on old server
>>>                       or...
>>> --------then I could clone this new setup to the new server.
>>> ?
>>> Thanks,
>>> David
>>> --
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