Install now, upgrade later?

David Groos djgroos at gmail.com
Mon Mar 22 18:20:07 GMT 2010 

Thanks again.

This new server that's coming my way has 2, Giga NICs, and I would add a
third, 100 MB NIC to reach out to the WAN.  I thought it would be great to
connect each Giga NICs to a separate switch which corresponds to a
classroom.   First, does this setup work (couldn't find it on the wiki) and
second, how difficult might it be to configure this soon-to-be-cloned-server
which currently only has 2 NICs?

David

On Sat, Mar 20, 2010 at 10:20 PM, ekul taylor <ekul.taylor at gmail.com> wrote:

> It looks like what has happened is the package names have changed from
> jaunty to karmic.  I don't see a -pae package in jaunty but it exists in
> karmic.  And in karmic linux-server is a metapackage for the -pae kernel.
>
> Use the free -m command to check and see if ubuntu is seeing more then 4 GB
> of ram while booted in the -server kernel.  If it is then you are all set
>
>
> On Sat, Mar 20, 2010 at 11:13 PM, David Groos <djgroos at gmail.com> wrote:
>
>> Sorry to keep bothering!  I got this:
>> dgroos at gcos2:~$ sudo aptitude install linux-generic-pae
>> [sudo] password for dgroos:
>> Reading package lists... Done
>> Building dependency tree
>> Reading state information... Done
>> Reading extended state information
>> Initializing package states... Done
>> Couldn't find any package whose name or description matched
>> "linux-generic-pae"
>> Couldn't find any package whose name or description matched
>> "linux-generic-pae"
>> No packages will be installed, upgraded, or removed.
>> 0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
>> Need to get 0B of archives. After unpacking 0B will be used.
>> Reading package lists... Done
>> Building dependency tree
>> Reading state information... Done
>> Reading extended state information
>> Initializing package states... Done
>> Any ideas?
>> David
>>
>>
>>
>> On Sat, Mar 20, 2010 at 10:02 PM, ekul taylor <ekul.taylor at gmail.com>wrote:
>>
>>> That's strange it didn't select the pae kernel.  In that case install the
>>> linux-generic-pae package.
>>>
>>> sudo aptitude install linux-generic-pae
>>>
>>>
>>> On Sat, Mar 20, 2010 at 10:50 PM, David Groos <djgroos at gmail.com> wrote:
>>>
>>>> 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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