[K12OSN] K12LTSP Chrooted Environment Misunderstanding

murrah boswell otrcomm at isp-systems.net
Thu Jul 2 15:44:47 UTC 2009

Hello Peter,

> What Todd wrote is correct.  In K12LTSP, access to the chroot 
> environment on the client is via Ctrl-Alt-F1, but must first be enabled 
> in the lst.conf file via the 'SCREEN02 = shell' parameter.  In the 
> lts.conf file there is a parameter listed for enabling support for local 
> apps, but it doesn't really work.  It was put there at the time more as 
> a place holder for the future.  The reason LTSP 4.2, on which K12LTSP 
> was based, doesn't have a full chrooted environment is that the idea 
> hadn't yet come to full fruition at the time.  If you need local apps, 
> use K12Linux/LTSP5.

Thanks for your reply! By "K12Linux/LTSP5" do you mean the Fedora 10 version with LTSP5 or do you mean the Centos5/RHEL5 with LTSP5? 
Either way, how would I force the terminal clients to use an application that is in the chrooted environment?

I am trying to get voice communication between the server and the TCs, and am currently experimenting with Sjphone for its 
simplicity. The problem is that when I start Sjphone from one of the TCs, it is actually running on the server so I can not 
establish communication. That is, if I dial one of the TC IPs from the server, I am just looping back on myself. I am not sure, but 
I figure if Sjphone is running from the TC chrooted environment, I should be able to connect to that instantiation via IP from the 


> Peter
> Todd O'Bryan wrote:
>> The system in the chroot environment is very basic--it's just enough
>> stuff to get the terminal up and running. Once the terminal is running
>> a basic OS, it connects to the server and acts as a remote X session.
>> When you log in on the terminal, you're logging onto the server, not
>> the chroot environment that's running on the terminal. The idea is
>> that a terminal that can only run basic stuff gets the full power of a
>> much nicer server, because everything really runs on the server. The
>> terminal is just a way of viewing the server processes.
>> There is a way to get to the chroot environment that's running on the
>> terminal--if I remember correctly, Ctrl-Alt-F1 will display a console
>> that really is running on the terminal. But you'd only use that to
>> debug problems, not as a normal operating mode.
>> Todd
>> On Mon, Jun 29, 2009 at 9:40 PM, murrah 
>> boswell<otrcomm at isp-systems.net> wrote:
>>> Hello All,
>>> I know everyone is busy and excited about Fedora 11 K12Linux, but I am
>>> attached to the K12LTSP system and have a couple of questions. I know 
>>> these
>>> are questions out of antiquity for some people who have been with 
>>> K12LTSP
>>> from the beginning, but please humor me here.
>>> I must have a misunderstanding about the /opt/ltsp/i386 chrooted 
>>> environment
>>> apparently. From a client terminal, when I right click on the desktop 
>>> and
>>> select to Create Launcher, Browse for Command and select File System, 
>>> why is
>>> it that the client terminal has full visibility of the server file 
>>> system
>>> and not just the chrooted environment? Same is true of a Terminal 
>>> window; I
>>> have total visibility of the server file system.
>>> Is there a reason why the K12LTSP isn't truly a chrooted environment?
>>> Along the same questioning, how do I install an application, such as
>>> linphone, in the chrooted environment and force the client to use 
>>> "local"
>>> instantiation of linphone and not allow them to even see the server 
>>> based
>>> instantiation of linphone?
>>> Regards,
>>> Murrah Boswell
>>> _______________________________________________
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