Install now, upgrade later?

[David Groos]

Thanks Ekul.  I didn't really understand what you meant by the dpkg so
didn't go with that but did understand the sudo aptitude part :)  So I did
this, it installed, I rebooted and checked:

dgroos at gcos2:~$ uname -r
2.6.28-18-server

Which doesn't have the -pae in the name.  Any ideas?
David


On Sat, Mar 20, 2010 at 4:29 PM, ekul taylor <ekul.taylor at gmail.com> wrote:

> It's actually really easy to install a kernel if you use the repositories.
>  dpkg adds your kernel to the list of available kernels so if for any reason
> you have trouble you can simply use grub to boot into your old kernel.
>  Among all package installations a new kernel is among the safest since
> reverting is as easy as hitting escape during grub and choosing the old
> kernel.
>
> I'm not sure what package mixture you have so I can't really deal with that
> but installing the PAE kernel is as simple as:
> sudo aptitude install linux-server
> This will install the kernel and any necessary headers.  If you want to run
> the karmic kernel but nothing else from karmic you'll have to do some apt
> pinning.
>
> As for the reason you don't have the pae kernel I believe it is only
> selected by default when installing via the server cd.  Any other method you
> have to add it via apt after install.
>
> On Sat, Mar 20, 2010 at 12:34 PM, David Groos <djgroos at gmail.com> wrote:
>
>>  I find I'm not using the server kernel which surprises me--isn't that the
>> one that the 'alternate CD' used?  Shouldn't that be the standard install
>> for a thin client server using Edubuntu?
>>
>> So, how do I go about installing this kernel?  I used the link that Alkis
>> provided and I could download the kernel.  I couldn't access it via
>> Synaptic, probably because I've set sources to Jaunty but I wasn't sure how
>> to set some to Karmic.  Any link/suggestion would be appreciated!  I don't
>> want to willy-nilly upgrade a kernel, sounds like risky business.
>>
>> Thanks!
>> David
>>
>> On Mar 19, 2010, at 4:35 PM, ekul taylor wrote:
>>
>> Run
>> 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 gmail.com> 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 gmail.com>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 gmail.com> 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:
>>>>>> http://packages.ubuntu.com/karmic/linux-server
>>>>>>
>>>>>> 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
>>>>>
>>>>>
>>>>> --
>>>>> edubuntu-users mailing list
>>>>>
>>>>> edubuntu-users at lists.ubuntu.com
>>>>>  Modify settings or unsubscribe at:
>>>>> https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
>>>>>
>>>>>
>>>>
>>>
>>
>>
>
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