Install now, upgrade later?

ekul taylor ekul.taylor at gmail.com
Mon Mar 22 18:35:15 GMT 2010 

It shouldn't be too hard at all.  Off the top of my head you have to make
sure of the following:

- the 2nd LAN NIC is assigned a new address in /etc/network/interfaces.  The
simple thing to do would be to assign the 2nd LAN NIC one subnet higher than
the existing one.
- dhcp server is listening on both gigE NICs.  Modify /etc/dhcp3/dhcpd.conf
to include a new section for the new subnet.  It will be exactly the same as
the section you already have just with different ip addresses.
- If you are using local apps you'll need to add a firewall rule for the new
subnet
- If you are using direct X connections you'll need to make sure X listens
and accepts connections on the new subnet

On Mon, Mar 22, 2010 at 2:20 PM, David Groos <djgroos at gmail.com> wrote:

> 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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