[K12OSN] Teacher access to teacher tool

Sat Sep 2 05:46:36 UTC 2006

On 9/1/06, James P. Kinney III <jkinney at localnetsolutions.com> wrote:
>
> On Fri, 2006-09-01 at 16:17 -0700, Robert Arkiletian wrote:
> >
> >
> > On 9/1/06, James P. Kinney III <jkinney at localnetsolutions.com> wrote:
> >         On Fri, 2006-09-01 at 14:08 -0700, Robert Arkiletian wrote:
> >
> >         >
> >         >
> >         >         Any suggestions?
> >
> >
> >
> >         TeacherTool is blowing away the folks in Atlanta!
> >
> >         Watching the look as we launched 23 simultaneous copies of
> >         OpenOffice with one button click was priceless!
> >
> >         The speedup with the IP address only (instead of the hostname)
> >         I am
> >           willing to sacrifice in favor of the hostname list and a way
> >         to filter
> >         the list. We are going to have 150-180 thin clients per server
> >         (Big
> >         Servers!) and the fun of a teacher accidentally logging out a
> >         student
> >         in another room is not something I want to play with :)
> >
> >
> > Hmm. This is an issue when you have big servers.  Without doing big
> > additions to my code :) I have a couple of ideas.
> >
> > 1) Not sure if each student has their own username but if they are
> > just using generic logins like comp1, comp2, comp3, etc then you can
> > differentiate with usernames like Acomp1, Bcomp1, Ccomp1, etc where
> > A,B,C stand for different rooms. Fl_TT will sort alphabetically so all
> > students in room A will be in one solid block in the list.
>
> We have a mix of autologon by machine name and individual logon that
> will track the student through the school (Middle school kids change
> classes). So for the most part, sorting by logon name will be a
> challenge.
> >
> > 2)I just thought of this but it's kind of tricky since dhcp gives out
> > ip's dynamically. If you can manage to tie an ip address to a specific
> > mac address (client machine) you could potentially make each machine
> > according to their mac address (and therefore location or classroom)
> > start a tiny little program at login that does nothing and takes up
> > almost no memory. The important aspect would be the name of the
> > program. Call it "classA" for all computers in room A. I think you get
> > the idea. So you could therebye use the FIND button in Fl_TT to select
> > only those users who are in room A by typing "classA" and hitting
> > FIND. You could then broadcast, logout, whatever and only affect the
> > kids in your room.
>
> We are doing fixed address dhcp. We have a host name scheme based on
> room number ans workstation number (i.e. rm114ws05). This is why I was
> thinking about the filtering ability.

Ahh. I see.

>
> >
> >
> >         I have tweaked the source files and have the hostname back on.
> >         If you
> >         have any suggestions on a best way to implement a filter
> >         ("show only
> >         hostnames that begin with foo") I'll look at a patch.
> >
> > I'm not sure why ip is less useful than hostnames since by default an
> > ip of say MailScanner warning: numerical links are often
> > malicious:192.168.0.252 translates to ws252.ltsp. Since Fl_TT can't
> > access another K12LTSP server the .ltsp part of the hostname should
> > always be the same.
>
> Well, the last version I was using (what shipped with K12LTSP v. 5.0.0)
> had the IP only code and didn't display the host name for the clients.
> That works for (I can think in hex on good days. I dream in perl. I need
> help! :) I was thinking about potentially 4000 teachers seeing dotted
> quads and having to be trained to see all that in the room. We will be
> labeling the screen very visibly but text makes more sense to them that
> IP addresses.

I see your desire for hostnames.

I was looking at the line that produces the list of machines and took
> out the "-n" to regain the host names. As the names will be in

It's not that simple. putting the -n back in will make things very slow
especially if you have many users.
I have just finished modifying 0.34 to give you back your hostnames without
the speed penalty.
At this point I don't feel this justifies a 0.35 release. Not sure how many
people would find this useful. I am just going to send you the code. Compile
etc, etc and see how you like it. Let me know how it works for you.

the /etc/hosts file it's a fast enough lookup. So now I'm looking at a
> wrapper script that asks for the room number on launch and then uses
> that to only display machines with that string in it. It's a bit of a
> kludge as it requires a) a fixed implementation of room number in the
> host name and b) it requires more input from the teachers on start up.
>
> If I can get thin clients in front of the teachers, I can name them in a
> similar way (rm103ts01) and then the wrapper script can simply read the
> hostname of the launching system and display the matching clients.
>
> Basically the wrapper script just passes the string to the main app that
> will be used to match the hostnames with. There will be a modification
> to the actual teachertool to accommodate being passed a variable and to
> do a grep on the list. Once I have it working, I'll send a patch.
> >
> >
> >         Also needed is a way to refresh the machine list without
> >         having to
> >         restart the tool.
> >
> > Just click on the Users button whenever you want a refreshed list. No
> > need to restart.
>
> Ah! Many thanks!
> >
> >
> >         --
> >         James P. Kinney III
> >         CEO & Director of Engineering
> >         Local Net Solutions,LLC
> >         770-493-8244
> >         http://www.localnetsolutions.com
> >
> >         GPG ID: 829C6CA7 James P. Kinney III ( M.S. Physics)
> >         <jkinney at localnetsolutions.com>
> >         Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C
> >         6CA7
> >
> >
> >         _______________________________________________
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> >         K12OSN at redhat.com
> >         https://www.redhat.com/mailman/listinfo/k12osn
> >         For more info see <http://www.k12os.org>
> >
> >
> >
> >
> >
> > --
> > Robert Arkiletian
> > Eric Hamber Secondary, Vancouver, Canada
> > Fl_TeacherTool http://www3.telus.net/public/robark/Fl_TeacherTool/
> > C++ GUI tutorial http://www3.telus.net/public/robark/
> > _______________________________________________
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> > K12OSN at redhat.com
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> > For more info see <http://www.k12os.org>
> --
> James P. Kinney III
> CEO & Director of Engineering
> Local Net Solutions,LLC
> 770-493-8244
> http://www.localnetsolutions.com
>
> GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> <jkinney at localnetsolutions.com>
> Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
>
>
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>
>
>

-- 
Robert Arkiletian
Eric Hamber Secondary, Vancouver, Canada
Fl_TeacherTool http://www3.telus.net/public/robark/Fl_TeacherTool/
C++ GUI tutorial http://www3.telus.net/public/robark/
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